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Meristem

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558:. The QC cells are characterized by their low mitotic activity. Evidence suggests that the QC maintains the surrounding stem cells by preventing their differentiation, via signal(s) that are yet to be discovered. This allows a constant supply of new cells in the meristem required for continuous root growth. Recent findings indicate that QC can also act as a reservoir of stem cells to replenish whatever is lost or damaged. Root apical meristem and tissue patterns become established in the embryo in the case of the primary root, and in the new lateral root primordium in the case of secondary roots. 263: 334: 325:, layer two of the corpus determines the characteristics of the edge of the leaf. The corpus and tunica play a critical part of the plant physical appearance as all plant cells are formed from the meristems. Apical meristems are found in two locations: the root and the stem. Some arctic plants have an apical meristem in the lower/middle parts of the plant. It is thought that this kind of meristem evolved because it is advantageous in arctic conditions. 3911: 500:, including A-ARRs. A-ARRs are similar to B-ARRs in structure; however, A-ARRs do not contain the DNA binding domains that B-ARRs have, and which are required to function as transcription factors. Therefore, A-ARRs do not contribute to the activation of transcription, and by competing for phosphates from phosphotransfer proteins, inhibit B-ARRs function. In the SAM, B-ARRs induce the expression of 765: 655:
If the dominant meristem is cut off, one or more branch tips will assume dominance. The branch will start growing faster and the new growth will be vertical. Over the years, the branch may begin to look more and more like an extension of the main trunk. Often several branches will exhibit this behavior after the removal of apical meristem, leading to a bushy growth.
523: 754: 359:. It is where the first indications that flower development has been evoked are manifested. One of these indications might be the loss of apical dominance and the release of otherwise dormant cells to develop as auxiliary shoot meristems, in some species in axils of primordia as close as two or three away from the apical dome. 1045:
In vascular cambium, the primary phloem and xylem are produced by the apical meristem. After this initial development, secondary phloem and xylem are produced by the lateral meristem. The two are connected through a thin layer of parenchymal cells which are differentiated into the fascicular cambium.
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family in this function. These genes essentially maintain the stem cells in an undifferentiated state. The KNOX family has undergone quite a bit of evolutionary diversification while keeping the overall mechanism more or less similar. Members of the KNOX family have been found in plants as diverse as
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is where one meristem prevents or inhibits the growth of other meristems. As a result, the plant will have one clearly defined main trunk. For example, in trees, the tip of the main trunk bears the dominant shoot meristem. Therefore, the tip of the trunk grows rapidly and is not shadowed by branches.
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Cork cambium creates a protective covering around the outside of a plant. This occurs after the secondary xylem and phloem has expanded already. Cortical parenchymal cells differentiate into cork cambium near the epidermis which lays down new cells called phelloderm and cork cells. These cork cells
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also exhibit intercalary growth. Intercalary meristems are capable of cell division, and they allow for rapid growth and regrowth of many monocots. Intercalary meristems at the nodes of bamboo allow for rapid stem elongation, while those at the base of most grass leaf blades allow damaged leaves to
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Through the years, scientists have manipulated floral meristems for economic reasons. An example is the mutant tobacco plant "Maryland Mammoth". In 1936, the department of agriculture of Switzerland performed several scientific tests with this plant. "Maryland Mammoth" is peculiar in that it grows
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There are three types of meristematic tissues: apical (at the tips), intercalary or basal (in the middle), and lateral (at the sides also known as cambium). At the meristem summit, there is a small group of slowly dividing cells, which is commonly called the central zone. Cells of this zone have a
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on legume plants such as soybean and pea is either determinate or indeterminate. Thus, soybean (or bean and Lotus japonicus) produce determinate nodules (spherical), with a branched vascular system surrounding the central infected zone. Often, Rhizobium-infected cells have only small vacuoles. In
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and is restricted to the centre of the floral meristem or the inner two whorls. This way floral identity and region specificity is achieved. WUS activates AG by binding to a consensus sequence in the AG's second intron and LFY binds to adjacent recognition sites. Once AG is activated it represses
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In contrast to vegetative apical meristems and some efflorescence meristems, floral meristems cannot continue to grow indefinitely. Their growth is limited to the flower with a particular size and form. The transition from shoot meristem to floral meristem requires floral meristem identity genes,
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Apical Meristems are the completely undifferentiated (indeterminate) meristems in a plant. These differentiate into three kinds of primary meristems. The primary meristems in turn produce the two secondary meristem types. These secondary meristems are also known as lateral meristems as they are
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around an organizing center called the quiescent center (QC) cells and together produces most of the cells in an adult root. At its apex, the root meristem is covered by the root cap, which protects and guides its growth trajectory. Cells are continuously sloughed off the outer surface of the
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Shoot apical meristems are the source of all above-ground organs, such as leaves and flowers. Cells at the shoot apical meristem summit serve as stem cells to the surrounding peripheral region, where they proliferate rapidly and are incorporated into differentiating leaf or flower primordia.
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After the primary growth, lateral meristems develop as secondary plant growth. This growth adds to the plant in diameter from the established stem but not all plants exhibit secondary growth. There are two types of secondary meristems: the vascular cambium and the cork cambium.
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are indeterminate, to maintain (at least for some time) an active meristem that yields new cells for Rhizobium infection. Thus zones of maturity exist in the nodule. Infected cells usually possess a large vacuole. The plant vascular system is branched and peripheral.
911:. Primary growth leads to lengthening of the plant body and organ formation. All plant organs arise ultimately from cell divisions in the apical meristems, followed by cell expansion and differentiation. Primary growth gives rise to the apical part of many plants. 1709:
Lohmann, Jan U.; Kieber, Joseph J.; Demar, Monika; Andreas Kehle; Stehling, Sandra; Busch, Wolfgang; To, Jennifer P. C.; Leibfried, Andrea (December 2005). "WUSCHEL controls meristem function by direct regulation of cytokinin-inducible response regulators".
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Lateral meristems, the form of secondary plant growth, add growth to the plants in their diameter. This is primarily observed in perennial dicots that survive from year to year. There are two types of lateral meristems: vascular cambium and cork cambium.
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histidine phosphotransfer proteins. Subsequently, the phosphate groups are transferred onto two types of Arabidopsis response regulators (ARRs): Type-B ARRS and Type-A ARRs. Type-B ARRs work as transcription factors to activate genes downstream of
302:), which provides the meristematic cells for future root growth. SAM and RAM cells divide rapidly and are considered indeterminate, in that they do not possess any defined end status. In that sense, the meristematic cells are frequently compared to the 955:
Propagating through cuttings is another form of vegetative propagation that initiates root or shoot production from secondary meristematic cambial cells. This explains why basal 'wounding' of shoot-borne cuttings often aids root formation.
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The fascicular cambium divides to create the new secondary phloem and xylem. Following this the cortical parenchyma between vascular cylinders differentiates interfascicular cambium. This process repeats for indeterminate growth.
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loop. Cytokinin signaling is positively reinforced by WUS to prevent the inhibition of cytokinin signaling, while WUS promotes its own inhibitor in the form of CLV3, which ultimately keeps WUS and cytokinin signaling in check.
188:(secondary meristems). The cork cambium further differentiates into the phelloderm (to the inside) and the phellem, or cork (to the outside). All three of these layers (cork cambium, phellem, and phelloderm) constitute the 599:
When plants begin flowering, the shoot apical meristem is transformed into an inflorescence meristem, which goes on to produce the floral meristem, which produces the sepals, petals, stamens, and carpels of the flower.
83:. Division of meristematic cells provides new cells for expansion and differentiation of tissues and the initiation of new organs, providing the basic structure of the plant body. The cells are small, with small 508:
then suppresses A-ARRs. As a result, B-ARRs are no longer inhibited, causing sustained cytokinin signaling in the center of the shoot apical meristem. Altogether with CLAVATA signaling, this system works as a
3741: 37:. The inner L3 layer is called the corpus. Cells in the L1 and L2 layers divide in a sideways fashion, which keeps these layers distinct, whereas the L3 layer divides in a more random fashion. 903:
Though each plant grows according to a certain set of rules, each new root and shoot meristem can go on growing for as long as it is alive. In many plants, meristematic growth is potentially
235:, which produces secondary xylem and secondary phloem. This is a process that may continue throughout the life of the plant. This is what gives rise to wood in plants. Such plants are called 3746: 1769:
Kieber, Joseph J.; Ecker, Joseph R.; Alonso, Jose M.; Schaller, G. Eric; Mason, Michael G.; Deruère, Jean; Ferreira, Fernando J.; Haberer, Georg; To, Jennifer P. C. (2004-03-01).
992:. Cells of the inner or outer cortex in the so-called "window of nodulation" just behind the developing root tip are induced to divide. The critical signal substance is the lipo- 143:
stem cell function and are essential for meristem maintenance. The proliferation and growth rates at the meristem summit usually differ considerably from those at the periphery.
666:. If apical dominance is complete, they prevent any branches from forming as long as the apical meristem is active. If the dominance is incomplete, side branches will develop. 689:
that also produce the lateral meristems while the stem elongates. It turns out that the mechanism of regulation of the stem cell number might be evolutionarily conserved. The
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Mackenzie, K.A.D; Howard, B.H (1986). "The Anatomical Relationship Between Cambial Regeneration and Root Initiation in Wounded Winter Cuttings of the Apple Rootstock M.26".
497: 1494: 938:. Such new plants can be grown from shoot cuttings that contain an apical meristem. Root apical meristems are not readily cloned, however. This cloning is called 3797: 999:, decorated with side groups to allow specificity of interaction. The Nod factor receptor proteins NFR1 and NFR5 were cloned from several legumes including 75:
plant cells generally cannot divide or produce cells of a different type. Meristematic cells are undifferentiated or incompletely differentiated. They are
2578: 3613: 877:, the expression continued, generating complex leaves. Also, it has been proposed that the mechanism of KNOX gene action is conserved across all 1339:
Fletcher JC, Brand U, Running MP, Simon R, Meyerowitz EM (1999). "Signaling of cell fate decisions by CLAVATA3 in Arabidopsis shoot meristems".
725:. These studies suggest that the regulation of stem cell number, identity and differentiation might be an evolutionarily conserved mechanism in 952:. This process known as mericloning, has been shown to reduce or eliminate viruses present in the parent plant in multiple species of plants. 309:
The apical meristems are layered where the number of layers varies according to plant type. In general the outermost layer is called the
1147:"Redox regulation at the site of primary growth: auxin, cytokinin and ROS crosstalk: Apical meristems plasticity in response to stress" 2006: 3803: 2043: 1108: 2157:"The fasciated ear2 gene encodes a leucine-rich repeat receptor-like protein that regulates shoot meristem proliferation in maize" 2698: 2447:"Elimination and detection of viruses in meristem-derived plantlets of sweetpotato as a low-cost option toward commercialization" 2114:
Lohmann, J. U. et al. (2001) A Molecular Link between Stem Cell Regulation and Floral Patterning in Arabidopsis Cell 105: 793-803
441: 3137: 2209:"Conservation and Diversification of Meristem Maintenance Mechanism in Oryza sativa: Function of the FLORAL ORGAN NUMBER2 Gene" 1292:"The Arabidopsis CLAVATA2 gene encodes a receptor-like protein required for the stability of the CLAVATA1 receptor-like kinase" 594: 3618: 1029:
signalling, and KAPP interaction, similar to that seen in the CLV1,2,3 system. LjKLAVIER also exhibits a nodule regulation
802:. Misexpression of these genes leads to the formation of interesting morphological features. For example, among members of 448:
that has been shown to interact with CLV1. KAPP is thought to act as a negative regulator of CLV1 by dephosphorylating it.
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Recent investigations into apical dominance and the control of branching have revealed a new plant hormone family termed
3787: 3374: 2889: 662:, types of plant growth regulators. These are produced in the apical meristem and transported towards the roots in the 425:
between the proteins. Proteins that contain these conserved regions have been grouped into the CLE family of proteins.
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of the apical meristem (growing tip). The epidermal (L1) and subepidermal (L2) layers form the outer layers called the
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that occur in plants. These cells continue to divide until they become differentiated and lose the ability to divide.
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Unlike the shoot apical meristem, the root apical meristem produces cells in two dimensions. It harbors two pools of
1924:"Multiple feedback loops through cytokinin signaling control stem cell number within the Arabidopsis shoot meristem" 1548:"Control of meristem development by CLAVATA1 receptor kinase and kinase-associated protein phosphatase interactions" 585:
rapidly regrow. This leaf regrowth in grasses evolved in response to damage by grazing herbivores and/or wildfires.
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of leaves, sepals, petals, stamens, and ovaries are initiated here at the rate of one every time interval, called a
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Bharathan G, et al. (2002). "Homologies in Leaf Form Inferred from KNOXI Gene Expression During Development".
119: 1243:"The CLAVATA1 gene encodes a putative receptor kinase that controls shoot and floral meristem size in Arabidopsis" 624:
is necessary to prevent the conversion of floral meristems to inflorescence shoot meristems, but is identity gene
3940: 3753: 612:) is a floral homeotic gene required for floral meristem termination and necessary for proper development of the 20: 3891: 3736: 2786: 466: 262: 155:, or an increase in length or height. Apical meristems may differentiate into three kinds of primary meristem: 72: 461:), which is a target of CLV signaling in addition to positively regulating CLV, thus forming a feedback loop. 406: 1019: 944: 422: 1771:"Type-A Arabidopsis Response Regulators Are Partially Redundant Negative Regulators of Cytokinin Signaling" 3935: 3721: 3645: 1207: 1188:
Evert, Ray, and Susan Eichhorn. Raven Biology of Plants. New York: W. H. Freeman and Company, 2013. Print.
2124: 1650:; Hwang, Ildoo (September 2001). "Two-component circuitry in Arabidopsis cytokinin signal transduction". 192:. In roots, the procambium can also give rise to the pericycle, which produces lateral roots in eudicots. 3886: 1488: 832:, and saw that some insertions led to formation of spurs that were very similar to the other members of 410: 333: 3608: 3460: 3132: 2691: 2408: 2365: 2261: 1935: 1719: 1659: 1348: 787: 757:
Note the long spur of the above flower. Spurs attract pollinators and confer pollinator specificity.
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Scofield and Murray (2006). The evolving concept of the meristem. Plant Molecular Biology 60:v–vii.
2609: 2605: 1016: 984: 921: 433: 673:. These compounds were previously known to be involved in seed germination and communication with 3716: 3581: 3450: 3359: 3051: 2837: 2733: 2650: 2389: 2338: 2287: 2092: 2067:
Heidstra, Renze; Sabatini, Sabrina (2014). "Plant and animal stem cells: similar yet different".
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that both specify the floral organs and cause the termination of the production of stem cells.
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Hay and Tsiantis; Tsiantis, M (2006). "The genetic basis for differences in leaf form between
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is expressed in the cells below the stem cells of the meristem and its presence prevents the
453: 389: 3660: 3566: 3561: 3515: 3408: 3393: 3354: 3279: 3120: 3044: 2941: 2883: 2632: 2550: 2534: 2503: 2466: 2458: 2420: 2409:"Elimination of viruses from the hop (Humulus lupulus) by heat therapy and meristem culture" 2373: 2322: 2269: 2220: 2176: 2168: 2129: 2076: 2031: 1994: 1961: 1943: 1886: 1839: 1798: 1782: 1727: 1667: 1611: 1567: 1559: 1517: 1466: 1456: 1438: 1406: 1398: 1356: 1311: 1303: 1254: 1215: 1158: 1079: 1064: 934:
Under appropriate conditions, each shoot meristem can develop into a complete, new plant or
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Bennett, Tom; Scheres, Ben (2010). "Root development-two meristems for the price of one?".
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are impermeable to water and gases because of a substance called suberin that coats them.
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The shoot apical meristem is the site of most of the embryogenesis in flowering plants.
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Nieminen, Kaisa; Blomster, Tiina; Helariutta, Ykä; Mähönen, Ari Pekka (January 2015).
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shoot meristems is maintained by a regulatory loop between Clavata and Wuschel genes"
1828:"The WUSCHEL gene is required for shoot and floral meristem integrity in Arabidopsis" 1572: 1547: 670: 481: 398: 321:, the tunica determines the physical characteristics of the leaf edge and margin. In 199: 2393: 2291: 2096: 1633: 1276: 107:). Meristematic cells are packed closely together without intercellular spaces. The 3839: 3829: 3731: 3455: 3440: 2949: 2916: 2654: 2424: 2342: 1755: 1695: 886: 834: 804: 782: 246: 207: 185: 76: 42: 2445:
Alam, I; Sharmin, SA; Naher, MK; Alam, MJ; Anisuzzaman, M; Alam, MF (April 2013).
1360: 239:. This does not occur in plants that do not go through secondary growth (known as 1122:"From primary to secondary growth: origin and development of the vascular system" 1011:). Regulation of nodule meristems utilizes long-distance regulation known as the 3655: 3640: 3635: 3571: 3433: 3213: 3184: 3083: 3078: 2926: 2766: 2761: 2746: 1600:"Role of WUSCHEL in Regulating Stem Cell Fate in the Arabidopsis Shoot Meristem" 1205:
Fletcher, J. C. (2002). "Shoot and Floral Meristem Maintenance in Arabidopsis".
1012: 915: 907:, making the overall shape of the plant not determinate in advance. This is the 898: 882: 855: 809: 799: 764: 730: 580: 356: 236: 203: 100: 96: 1033:
though it is not yet known how this relates to the other AON receptor kinases.
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of the stem cells. CLV1 acts to promote cellular differentiation by repressing
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Schoof, Heiko; Lenhard, M; Haecker, A; Mayer, KF; Jürgens, G; Laux, T (2000).
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Suzaki T.; Toriba, T; Fujimoto, M; Tsutsumi, N; Kitano, H; Hirano, HY (2006).
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and is widely practiced in horticulture to mass-produce plants of a desirable
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Gordon, S. P.; Chickarmane, V. S.; Ohno, C.; Meyerowitz, E. M. (2009-08-26).
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These four distinct zones are maintained by a complex signalling pathway. In
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Apical meristems give rise to the primary plant body and are responsible for
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Jackson, David; Simon, Rüdiger; Je, Byoung Il; Somssich, Marc (2016-09-15).
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system seems to bear a close relationship with the CLV signaling system in
2480: 1859: 1625: 1581: 1563: 1461: 1268: 1098: 753: 522: 440:. These proteins may act as an intermediate between the CLV complex and a 3834: 3824: 3768: 3763: 3530: 3403: 3379: 3296: 2751: 2579:"Plant Development II: Primary and Secondary Growth | Organismal Biology" 2225: 2208: 1843: 1402: 989: 949: 726: 555: 189: 1731: 1508:
Valster, A. H.; et al. (2000). "Plant GTPases: the Rhos in bloom".
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Tognetti, Vanesa B.; Bielach, Agnieszka; Hrtyan, Mónika (October 2017).
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In angiosperms, intercalary (sometimes called basal) meristems occur in
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Karsten Oelkers, Nicolas Goffard, Georg F Weiller, Peter M Gresshoff,
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Taguchi-Shiobara; Yuan, Z; Hake, S; Jackson, D; et al. (2001).
2080: 436:. For example, the CLV complex has been found to be associated with 2326: 65:. Cells in the meristem can develop into all the other tissues and 3696: 3630: 3552: 3520: 3477: 3369: 3311: 3306: 3301: 3289: 3274: 3243: 3164: 2822: 2813: 795: 763: 752: 704: 659: 626: 521: 444:(MAPK), which is often involved in signalling cascades. KAPP is a 397:
reservoir in the shoot apical meristem by controlling the rate of
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The shoot apical meristem consists of four distinct cell groups:
249:, which gives rise to the periderm, which replaces the epidermis. 3547: 3542: 3194: 3034: 3009: 3004: 2988: 2959: 2847: 1989:
Sebastian, Jose; Lee, Ji-Young (2013). "Root Apical Meristems".
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activity outside of the central zone containing the stem cells.
215: 2680: 294:), which gives rise to organs like the leaves and flowers, and 128:("Contributions to Scientific Botany"). It is derived from 3467: 3029: 2610:
Micrographs of plant cells and tissues, with explanatory text.
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Jurgens, G.; Berger, J.; Mayer, K. F.; Laux, T. (1996-01-01).
979: 715:) also involved in the same function. Similarly, in rice, the 639:
expression of WUS leading to the termination of the meristem.
172:: lies just inside of the protoderm and develops into primary 1443:"Bioinformatic Analysis of the CLE signalling peptide family" 873:, the KNOX genes are completely turned off in leaves, but in 853:. One study looked at the pattern of KNOX gene expression in 677:
and are now shown to be involved in inhibition of branching.
103:) are undifferentiated, but are present in rudimentary form ( 1015:(AON). This process involves a leaf-vascular tissue located 162:: lies around the outside of the stem and develops into the 139: 'to divide', in recognition of its inherent function. 2202: 2200: 1387:"A Large Family of Genes That Share Homology with CLAVATA3" 816:
in the floral region. A spur is considered an evolutionary
343:(left). Fourteen days later, leaves have developed (right). 306:
in animals, which have an analogous behavior and function.
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Plant Patterning: Structural and Molecular Genetic Aspects
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populations could probably be an evolutionary innovation.
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and CLV2 are predicted to form a receptor complex (of the
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This article is about a plant tissue. For other uses, see
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Baucher, Marie; AlmJaziri, Mondher; Vandeputte, Olivier.
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Founder cells for organ initiation in surrounding regions
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responsible for maintaining the stem cell population in
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Another important gene in plant meristem maintenance is
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and tomato. KNOX-like genes are also present in some
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specificity and attraction. Researchers carried out
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Type of plant tissue involved in cell proliferation
745:that goes about in the living world all the time. 2248:Golz J.F.; Keck, Emma J.; Hudson, Andrew (2002). 1875:"CLAVATA-WUSCHEL signaling in the shoot meristem" 1432: 1430: 1184: 1182: 417:with the ESR proteins of maize, with a short 14 266:Organisation of an apical meristem (growing tip) 1928:Proceedings of the National Academy of Sciences 1200: 1198: 1196: 1194: 1103:. World Scientific Publishing Company. p. 333. 393:genes are required to regulate the size of the 286:There are two types of apical meristem tissue: 964:Meristems may also be induced in the roots of 658:The mechanism of apical dominance is based on 574:) stems at the base of nodes and leaf blades. 526:10x microscope image of root tip with meristem 480:in the shoot apical meristem is linked to the 371:The immediate daughter cells of the stem cells 2692: 1380: 1378: 428:CLV1 has been shown to interact with several 8: 3798:International Association for Plant Taxonomy 1493:: CS1 maint: multiple names: authors list ( 1385:J. Mark Cock; Sheila McCormick (July 2001). 1241:Clark SE, Williams RW, Meyerowitz E (1997). 845:The KNOX family has also been implicated in 123: 838:, indicating that the loss of spur in wild 2899: 2699: 2685: 2677: 851:(See below for a more detailed discussion) 432:proteins that are most likely involved in 2636: 2554: 2470: 2273: 2224: 2180: 1965: 1947: 1890: 1802: 1615: 1571: 1470: 1460: 1410: 1315: 1258: 1162: 118:was first used in 1858 by Swiss botanist 3742:International Code of Nomenclature (ICN) 2672:Meristemania.org – Research on meristems 1290:Jeong S, Trotochaud AE, Clark S (1999). 1220:10.1146/annurev.arplant.53.092701.143332 2024:Current Topics in Developmental Biology 1541: 1539: 1090: 919:contrast, nodules on pea, clovers, and 781:have identified genes belonging to the 643:much faster than other tobacco plants. 125:Beiträge zur Wissenschaftlichen Botanik 2110: 2108: 2106: 1593: 1591: 1486: 1441:and Tancred Frickey (3 January 2008). 2069:Nature Reviews Molecular Cell Biology 446:kinase-associated protein phosphatase 438:Rho/Rac small GTPase-related proteins 7: 1598:Mayer, K. F. X; et al. (1998). 741:number. This example underlines the 1999:10.1002/9780470015902.a0020121.pub2 681:Diversity in meristem architectures 313:while the innermost layers are the 2508:10.1093/oxfordjournals.aob.a087228 1546:Stone, J. M.; et al. (1998). 504:which induces stem cell identity. 111:is a very thin primary cell wall. 14: 3747:ICN for Cultivated Plants (ICNCP) 1025:(LjHAR1, GmNARK and MtSUNN), CLE 893:Indeterminate growth of meristems 737:, that is involved in regulating 685:The SAM contains a population of 276:Medullary (i.e. central) meristem 91:filling the cell completely. The 3910: 3909: 2413:Journal of Horticultural Science 808:, only the species of the genus 774:result from KNOX gene expression 533:calyptrogen (live rootcap cells) 442:mitogen-activated protein kinase 53:found in plants. It consists of 2583:organismalbio.biosci.gatech.edu 703:is very closely related to the 595:ABC model of flower development 539:sloughed off dead rootcap cells 2604:Plant Anatomy Laboratory from 2523:"Vascular Cambium Development" 2425:10.1080/00221589.1975.11514616 914:The growth of nitrogen-fixing 885:between KNOX expression and a 1: 2638:10.1016/S0092-8674(00)80700-X 2275:10.1016/S0960-9822(02)00721-2 2036:10.1016/S0070-2153(10)91003-X 1617:10.1016/S0092-8674(00)81703-1 1522:10.1016/s0962-8924(00)01728-1 1361:10.1126/science.283.5409.1911 1260:10.1016/S0092-8674(00)80239-1 1151:Plant, Cell & Environment 859:, that has simple leaves and 749:Role of the KNOX-family genes 374:A subjacent organizing center 3788:History of plant systematics 3375:Thorns, spines, and prickles 1013:autoregulation of nodulation 259:involved in lateral growth. 210:cells that develop into the 2407:Adams, Alexa (April 2013). 881:, because there is a tight 759:(Flower: Linaria dalmatica) 409:family) to which CLV3 is a 3957: 3604:Alternation of generations 896: 592: 337:Shoot apical meristems of 18: 3905: 3754:Cultivated plant taxonomy 3717:Biological classification 2714: 2608:; the lab of JD Mauseth. 2463:10.1007/s13205-012-0080-6 79:and capable of continued 21:Meristem (disambiguation) 3614:Evolutionary development 812:lack a structure called 407:LRR receptor-like kinase 122:(1817–1891) in his book 3265:Hypanthium (Floral cup) 2378:10.1126/science.1070343 2161:Genes & Development 1949:10.1073/pnas.0908122106 945:vegetative reproduction 180:. It also produces the 120:Carl Wilhelm von Nägeli 3880:by author abbreviation 3804:Plant taxonomy systems 3722:Botanical nomenclature 2309:and its wild relative 2213:Plant and Cell Physiol 1510:Trends in Cell Biology 1308:10.1105/tpc.11.10.1925 1208:Annu. Rev. Plant Biol. 775: 761: 546: 487:. Cytokinin activates 344: 329:Shoot Apical Meristems 283: 124: 55:undifferentiated cells 38: 3887:Botanical expeditions 1564:10.1104/pp.117.4.1217 1462:10.1186/1471-2229-8-1 897:Further information: 767: 756: 593:Further information: 525: 434:downstream signalling 336: 288:shoot apical meristem 265: 29: 3619:Evolutionary history 3609:Double fertilization 3461:Cellular respiration 2527:The Arabidopsis Book 2307:Arabidopsis thaliana 1844:10.1242/dev.122.1.87 1403:10.1104/pp.126.3.939 1097:Galun, Esra (2007). 940:asexual reproduction 798:, mosses, ferns and 788:Arabidopsis thaliana 722:Arabidopsis thaliana 700:Arabidopsis thaliana 562:Intercalary meristem 518:Root apical meristem 384:Arabidopsis thaliana 296:root apical meristem 2838:Non-vascular plants 2606:University of Texas 2370:2002Sci...296.1858B 2364:(5574): 1858–1860. 2266:2002CBio...12..515G 1940:2009PNAS..10616529G 1934:(38): 16529–16534. 1732:10.1038/nature04270 1724:2005Natur.438.1172L 1718:(7071): 1172–1175. 1664:2001Natur.413..383H 1353:1999Sci...283.1911F 1005:Medicago truncatula 985:Medicago truncatula 922:Medicago truncatula 820:because it defines 413:. CLV3 shares some 223:Secondary meristems 31:Tunica-corpus model 3343:Surface structures 3138:Flower development 2226:10.1093/pcp/pcl025 2173:10.1101/gad.208501 2137:(7210). 2008-09-11 1892:10.1242/dev.133645 1787:10.1105/tpc.018978 776: 768:Complex leaves of 762: 547: 345: 284: 59:meristematic cells 39: 3923: 3922: 3562:Herbaceous plants 3388: 3387: 2311:Cardamine hirsuta 2219:(12): 1591–1602. 2167:(20): 2755–2766. 1885:(18): 3238–3248. 1658:(6854): 383–389. 1448:BMC Plant Biology 1347:(5409): 1911–14. 1164:10.1111/pce.13021 1157:(11): 2586–2605. 1037:Lateral Meristems 960:Induced meristems 865:, a plant having 862:Cardamine hirsuta 840:Antirrhinum majus 830:Antirrhinum majus 771:Cardamine hirsuta 675:mycorrhizal fungi 511:negative feedback 489:histidine kinases 147:Primary meristems 3948: 3941:Plant physiology 3913: 3912: 3892:Individual trees 3567:Secondary growth 3538:Succulent plants 3526:Prostrate shrubs 3409:Apical dominance 3394:Plant physiology 3355:Epicuticular wax 2900: 2893: 2884:Plant morphology 2701: 2694: 2687: 2678: 2658: 2640: 2593: 2592: 2590: 2589: 2575: 2569: 2568: 2558: 2539:10.1199/tab.0177 2518: 2512: 2511: 2496:Annals of Botany 2491: 2485: 2484: 2474: 2442: 2436: 2435: 2433: 2431: 2404: 2398: 2397: 2353: 2347: 2346: 2302: 2296: 2295: 2277: 2245: 2239: 2238: 2228: 2204: 2195: 2194: 2184: 2152: 2146: 2145: 2143: 2142: 2121: 2115: 2112: 2101: 2100: 2064: 2058: 2057: 2019: 2013: 2012: 1986: 1980: 1979: 1969: 1951: 1919: 1913: 1912: 1894: 1870: 1864: 1863: 1823: 1817: 1816: 1806: 1766: 1760: 1759: 1706: 1700: 1699: 1672:10.1038/35096500 1644: 1638: 1637: 1619: 1595: 1586: 1585: 1575: 1558:(4): 1217–1225. 1552:Plant Physiology 1543: 1534: 1533: 1505: 1499: 1498: 1492: 1484: 1474: 1464: 1439:Ulrike Mathesius 1434: 1425: 1424: 1414: 1391:Plant Physiology 1382: 1373: 1372: 1336: 1330: 1329: 1319: 1287: 1281: 1280: 1262: 1238: 1232: 1231: 1202: 1189: 1186: 1177: 1176: 1166: 1142: 1136: 1135: 1133: 1132: 1126:academic.oup.com 1117: 1111: 1095: 1065:Secondary growth 849:shape evolution 652:Apical dominance 647:Apical dominance 570:(in particular, 530:quiescent center 476:The function of 387:, 3 interacting 279:Medullary tissue 254:Apical meristems 233:Vascular cambium 182:vascular cambium 127: 3956: 3955: 3951: 3950: 3949: 3947: 3946: 3945: 3926: 3925: 3924: 3919: 3901: 3870:Botanical terms 3863: 3849: 3813: 3759:Citrus taxonomy 3737:Author citation 3703: 3597: 3576: 3498: 3492: 3488:Turgor pressure 3396: 3384: 3338: 3153:Floral symmetry 3071: 3063: 2993: 2982:Vascular bundle 2977:Vascular tissue 2936: 2896: 2887: 2886: 2872: 2843:Vascular plants 2808: 2804:Plant pathology 2728: 2710: 2705: 2668: 2614: 2601: 2596: 2587: 2585: 2577: 2576: 2572: 2520: 2519: 2515: 2493: 2492: 2488: 2444: 2443: 2439: 2429: 2427: 2406: 2405: 2401: 2355: 2354: 2350: 2304: 2303: 2299: 2247: 2246: 2242: 2206: 2205: 2198: 2154: 2153: 2149: 2140: 2138: 2123: 2122: 2118: 2113: 2104: 2081:10.1038/nrm3790 2066: 2065: 2061: 2046: 2021: 2020: 2016: 2009: 1988: 1987: 1983: 1921: 1920: 1916: 1872: 1871: 1867: 1825: 1824: 1820: 1768: 1767: 1763: 1708: 1707: 1703: 1646: 1645: 1641: 1597: 1596: 1589: 1545: 1544: 1537: 1507: 1506: 1502: 1485: 1436: 1435: 1428: 1384: 1383: 1376: 1338: 1337: 1333: 1302:(10): 1925–33. 1289: 1288: 1284: 1240: 1239: 1235: 1204: 1203: 1192: 1187: 1180: 1144: 1143: 1139: 1130: 1128: 1119: 1118: 1114: 1096: 1092: 1088: 1056: 1039: 1001:Lotus japonicus 994:oligosaccharide 975:Lotus japonicus 962: 932: 901: 895: 879:vascular plants 828:mutagenesis in 779:Genetic screens 751: 709:FASCIATED EAR 2 683: 649: 597: 591: 589:Floral meristem 564: 545: 520: 467:differentiation 331: 282: 273:Peripheral zone 256: 225: 196:Ground meristem 149: 24: 17: 12: 11: 5: 3954: 3952: 3944: 3943: 3938: 3928: 3927: 3921: 3920: 3918: 3917: 3906: 3903: 3902: 3900: 3899: 3894: 3889: 3884: 3883: 3882: 3872: 3866: 3864: 3862: 3861: 3860:Related topics 3858: 3854: 3851: 3850: 3848: 3847: 3842: 3837: 3832: 3827: 3821: 3819: 3815: 3814: 3812: 3811: 3809:Taxonomic rank 3806: 3801: 3795: 3790: 3785: 3784: 3783: 3782: 3781: 3776: 3771: 3761: 3751: 3750: 3749: 3744: 3739: 3734: 3729: 3727:Botanical name 3719: 3713: 3711: 3709:Plant taxonomy 3705: 3704: 3702: 3701: 3700: 3699: 3694: 3693: 3692: 3685:Megasporangium 3682: 3681: 3680: 3673:Microsporangia 3665: 3664: 3663: 3658: 3653: 3648: 3638: 3633: 3628: 3627: 3626: 3616: 3611: 3606: 3600: 3598: 3596: 3595: 3590: 3584: 3578: 3577: 3575: 3574: 3569: 3564: 3559: 3558: 3557: 3556: 3555: 3545: 3540: 3535: 3534: 3533: 3528: 3518: 3513: 3511:Cushion plants 3502: 3500: 3494: 3493: 3491: 3490: 3485: 3480: 3475: 3470: 3465: 3464: 3463: 3458: 3448: 3446:Plant hormones 3443: 3438: 3437: 3436: 3429:Photosynthesis 3426: 3421: 3416: 3411: 3406: 3400: 3398: 3390: 3389: 3386: 3385: 3383: 3382: 3377: 3372: 3367: 3362: 3357: 3352: 3346: 3344: 3340: 3339: 3337: 3336: 3331: 3326: 3321: 3316: 3315: 3314: 3309: 3304: 3294: 3293: 3292: 3287: 3282: 3277: 3267: 3262: 3261: 3260: 3259: 3258: 3253: 3248: 3247: 3246: 3241: 3221: 3216: 3211: 3210: 3209: 3208: 3207: 3202: 3192: 3187: 3182: 3177: 3172: 3162: 3161: 3160: 3155: 3150: 3148:Floral formula 3145: 3143:Floral diagram 3140: 3135: 3125: 3124: 3123: 3118: 3113: 3112: 3111: 3106: 3096: 3086: 3081: 3075: 3073: 3072:(incl. Flower) 3065: 3064: 3062: 3061: 3060: 3059: 3054: 3049: 3048: 3047: 3042: 3032: 3022: 3017: 3012: 3007: 3001: 2999: 2995: 2994: 2992: 2991: 2986: 2985: 2984: 2974: 2972:Storage organs 2969: 2964: 2963: 2962: 2952: 2946: 2944: 2938: 2937: 2935: 2934: 2929: 2924: 2919: 2914: 2908: 2906: 2897: 2895: 2894: 2880: 2874: 2873: 2871: 2870: 2865: 2860: 2858:Spermatophytes 2855: 2850: 2845: 2840: 2835: 2830: 2828:Archaeplastida 2825: 2819: 2817: 2810: 2809: 2807: 2806: 2801: 2796: 2791: 2790: 2789: 2782:Phytogeography 2779: 2777:Phytochemistry 2774: 2769: 2764: 2759: 2754: 2749: 2744: 2738: 2736: 2734:Subdisciplines 2730: 2729: 2727: 2726: 2721: 2715: 2712: 2711: 2706: 2704: 2703: 2696: 2689: 2681: 2675: 2674: 2667: 2666:External links 2664: 2663: 2662: 2659: 2631:(6): 635–644. 2612: 2600: 2597: 2595: 2594: 2570: 2513: 2502:(5): 649–661. 2486: 2437: 2419:(2): 151–160. 2399: 2348: 2327:10.1038/ng1835 2321:(8): 942–947. 2297: 2260:(7): 515–522. 2240: 2196: 2147: 2116: 2102: 2059: 2044: 2014: 2008:978-0470016176 2007: 1981: 1914: 1865: 1818: 1781:(3): 658–671. 1775:The Plant Cell 1761: 1701: 1639: 1610:(6): 805–815. 1587: 1535: 1516:(4): 141–146. 1500: 1426: 1397:(3): 939–942. 1374: 1331: 1282: 1233: 1190: 1178: 1137: 1112: 1089: 1087: 1084: 1083: 1082: 1077: 1072: 1067: 1062: 1060:Primary growth 1055: 1052: 1038: 1035: 961: 958: 931: 928: 909:primary growth 894: 891: 867:complex leaves 750: 747: 682: 679: 671:strigolactones 648: 645: 590: 587: 563: 560: 544: 543: 540: 537: 534: 531: 527: 519: 516: 457:(shortened to 379: 378: 375: 372: 369: 340:Crassula ovata 330: 327: 281: 280: 277: 274: 271: 267: 255: 252: 251: 250: 244: 224: 221: 220: 219: 198:: Composed of 193: 167: 153:primary growth 148: 145: 73:Differentiated 15: 13: 10: 9: 6: 4: 3: 2: 3953: 3942: 3939: 3937: 3936:Plant anatomy 3934: 3933: 3931: 3916: 3908: 3907: 3904: 3898: 3895: 3893: 3890: 3888: 3885: 3881: 3878: 3877: 3876: 3873: 3871: 3868: 3867: 3865: 3859: 3856: 3855: 3852: 3846: 3845:Phytochemical 3843: 3841: 3838: 3836: 3833: 3831: 3828: 3826: 3823: 3822: 3820: 3816: 3810: 3807: 3805: 3802: 3799: 3796: 3794: 3791: 3789: 3786: 3780: 3777: 3775: 3772: 3770: 3767: 3766: 3765: 3762: 3760: 3757: 3756: 3755: 3752: 3748: 3745: 3743: 3740: 3738: 3735: 3733: 3730: 3728: 3725: 3724: 3723: 3720: 3718: 3715: 3714: 3712: 3710: 3706: 3698: 3695: 3691: 3688: 3687: 3686: 3683: 3679: 3676: 3675: 3674: 3671: 3670: 3669: 3666: 3662: 3659: 3657: 3654: 3652: 3649: 3647: 3644: 3643: 3642: 3639: 3637: 3634: 3632: 3629: 3625: 3622: 3621: 3620: 3617: 3615: 3612: 3610: 3607: 3605: 3602: 3601: 3599: 3594: 3591: 3589: 3586: 3585: 3583: 3579: 3573: 3570: 3568: 3565: 3563: 3560: 3554: 3551: 3550: 3549: 3546: 3544: 3541: 3539: 3536: 3532: 3529: 3527: 3524: 3523: 3522: 3519: 3517: 3514: 3512: 3509: 3508: 3507: 3504: 3503: 3501: 3495: 3489: 3486: 3484: 3483:Transpiration 3481: 3479: 3476: 3474: 3471: 3469: 3466: 3462: 3459: 3457: 3454: 3453: 3452: 3449: 3447: 3444: 3442: 3439: 3435: 3432: 3431: 3430: 3427: 3425: 3422: 3420: 3417: 3415: 3412: 3410: 3407: 3405: 3402: 3401: 3399: 3395: 3391: 3381: 3378: 3376: 3373: 3371: 3368: 3366: 3363: 3361: 3358: 3356: 3353: 3351: 3348: 3347: 3345: 3341: 3335: 3332: 3330: 3327: 3325: 3322: 3320: 3317: 3313: 3310: 3308: 3305: 3303: 3300: 3299: 3298: 3295: 3291: 3288: 3286: 3283: 3281: 3278: 3276: 3273: 3272: 3271: 3270:Inflorescence 3268: 3266: 3263: 3257: 3254: 3252: 3249: 3245: 3242: 3240: 3237: 3236: 3235: 3232: 3231: 3230: 3227: 3226: 3225: 3222: 3220: 3217: 3215: 3212: 3206: 3203: 3201: 3198: 3197: 3196: 3193: 3191: 3188: 3186: 3183: 3181: 3178: 3176: 3173: 3171: 3168: 3167: 3166: 3163: 3159: 3156: 3154: 3151: 3149: 3146: 3144: 3141: 3139: 3136: 3134: 3131: 3130: 3129: 3126: 3122: 3119: 3117: 3114: 3110: 3107: 3105: 3102: 3101: 3100: 3097: 3095: 3092: 3091: 3090: 3087: 3085: 3082: 3080: 3077: 3076: 3074: 3070: 3066: 3058: 3055: 3053: 3050: 3046: 3043: 3041: 3038: 3037: 3036: 3033: 3031: 3028: 3027: 3026: 3023: 3021: 3018: 3016: 3013: 3011: 3008: 3006: 3003: 3002: 3000: 2996: 2990: 2987: 2983: 2980: 2979: 2978: 2975: 2973: 2970: 2968: 2965: 2961: 2958: 2957: 2956: 2955:Ground tissue 2953: 2951: 2948: 2947: 2945: 2943: 2939: 2933: 2930: 2928: 2925: 2923: 2920: 2918: 2915: 2913: 2910: 2909: 2907: 2905: 2901: 2898: 2891: 2885: 2882: 2881: 2879: 2878:Plant anatomy 2875: 2869: 2866: 2864: 2861: 2859: 2856: 2854: 2851: 2849: 2846: 2844: 2841: 2839: 2836: 2834: 2831: 2829: 2826: 2824: 2821: 2820: 2818: 2815: 2811: 2805: 2802: 2800: 2799:Plant ecology 2797: 2795: 2794:Plant anatomy 2792: 2788: 2785: 2784: 2783: 2780: 2778: 2775: 2773: 2770: 2768: 2765: 2763: 2760: 2758: 2755: 2753: 2750: 2748: 2745: 2743: 2742:Archaeobotany 2740: 2739: 2737: 2735: 2731: 2725: 2722: 2720: 2717: 2716: 2713: 2709: 2702: 2697: 2695: 2690: 2688: 2683: 2682: 2679: 2673: 2670: 2669: 2665: 2660: 2656: 2652: 2648: 2644: 2639: 2634: 2630: 2626: 2622: 2620: 2613: 2611: 2607: 2603: 2602: 2598: 2584: 2580: 2574: 2571: 2566: 2562: 2557: 2552: 2548: 2544: 2540: 2536: 2532: 2528: 2524: 2517: 2514: 2509: 2505: 2501: 2497: 2490: 2487: 2482: 2478: 2473: 2468: 2464: 2460: 2457:(2): 53–164. 2456: 2452: 2448: 2441: 2438: 2426: 2422: 2418: 2414: 2410: 2403: 2400: 2395: 2391: 2387: 2383: 2379: 2375: 2371: 2367: 2363: 2359: 2352: 2349: 2344: 2340: 2336: 2332: 2328: 2324: 2320: 2316: 2312: 2308: 2301: 2298: 2293: 2289: 2285: 2281: 2276: 2271: 2267: 2263: 2259: 2255: 2251: 2244: 2241: 2236: 2232: 2227: 2222: 2218: 2214: 2210: 2203: 2201: 2197: 2192: 2188: 2183: 2178: 2174: 2170: 2166: 2162: 2158: 2151: 2148: 2136: 2132: 2131: 2126: 2120: 2117: 2111: 2109: 2107: 2103: 2098: 2094: 2090: 2086: 2082: 2078: 2075:(5): 301–12. 2074: 2070: 2063: 2060: 2055: 2051: 2047: 2045:9780123809100 2041: 2037: 2033: 2029: 2025: 2018: 2015: 2010: 2004: 2000: 1996: 1992: 1985: 1982: 1977: 1973: 1968: 1963: 1959: 1955: 1950: 1945: 1941: 1937: 1933: 1929: 1925: 1918: 1915: 1910: 1906: 1902: 1898: 1893: 1888: 1884: 1880: 1876: 1869: 1866: 1861: 1857: 1853: 1849: 1845: 1841: 1837: 1833: 1829: 1822: 1819: 1814: 1810: 1805: 1800: 1796: 1792: 1788: 1784: 1780: 1776: 1772: 1765: 1762: 1757: 1753: 1749: 1745: 1741: 1737: 1733: 1729: 1725: 1721: 1717: 1713: 1705: 1702: 1697: 1693: 1689: 1685: 1681: 1677: 1673: 1669: 1665: 1661: 1657: 1653: 1649: 1643: 1640: 1635: 1631: 1627: 1623: 1618: 1613: 1609: 1605: 1601: 1594: 1592: 1588: 1583: 1579: 1574: 1569: 1565: 1561: 1557: 1553: 1549: 1542: 1540: 1536: 1531: 1527: 1523: 1519: 1515: 1511: 1504: 1501: 1496: 1490: 1482: 1478: 1473: 1468: 1463: 1458: 1454: 1450: 1449: 1444: 1440: 1433: 1431: 1427: 1422: 1418: 1413: 1408: 1404: 1400: 1396: 1392: 1388: 1381: 1379: 1375: 1370: 1366: 1362: 1358: 1354: 1350: 1346: 1342: 1335: 1332: 1327: 1323: 1318: 1313: 1309: 1305: 1301: 1297: 1293: 1286: 1283: 1278: 1274: 1270: 1266: 1261: 1256: 1253:(4): 575–85. 1252: 1248: 1244: 1237: 1234: 1229: 1225: 1221: 1217: 1213: 1210: 1209: 1201: 1199: 1197: 1195: 1191: 1185: 1183: 1179: 1174: 1170: 1165: 1160: 1156: 1152: 1148: 1141: 1138: 1127: 1123: 1116: 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439: 435: 431: 426: 424: 421:region being 420: 416: 412: 408: 404: 400: 399:cell division 396: 392: 391: 386: 385: 376: 373: 370: 368: 365: 364: 363: 360: 358: 354: 349: 342: 341: 335: 328: 326: 324: 320: 316: 312: 307: 305: 301: 297: 293: 289: 278: 275: 272: 269: 268: 264: 260: 253: 248: 245: 242: 238: 234: 231: 230: 229: 222: 217: 213: 209: 205: 201: 197: 194: 191: 187: 183: 179: 175: 171: 168: 165: 161: 158: 157: 156: 154: 146: 144: 140: 138: 134: 131: 126: 121: 117: 112: 110: 106: 102: 98: 94: 90: 87:or none, and 86: 82: 81:cell division 78: 74: 70: 68: 64: 63:cell division 61:) capable of 60: 56: 52: 49:is a type of 48: 44: 36: 32: 28: 22: 3840:Horticulture 3830:Floriculture 3732:Correct name 3582:Reproduction 3572:Woody plants 3497:Plant growth 3456:Gas Exchange 3441:Phytomelanin 3319:Plant embryo 3069:Reproductive 2966: 2917:Phragmoplast 2628: 2624: 2618: 2586:. 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Index

Meristem (disambiguation)

tunica
cell biology
tissue
undifferentiated cells
cell division
organs
Differentiated
totipotent
cell division
vacuoles
protoplasm
plastids
chloroplasts
chromoplasts
proplastids
cell wall
Carl Wilhelm von Nägeli
Greek
primary growth
epidermis
xylem
phloem
vascular cambium
cork cambium
periderm
parenchyma
collenchyma
sclerenchyma

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