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Desmidium cell walls are smooth with multiple side-by-side or scattered pores. Every semicell contains one stellate chloroplast. Typically cells are oval in shape or have a three to five angle. Angles of the cell are often off-balance on each semicell. This creates a helical shape of angles throughout the filament. Cells may have either a pyrenoid (transparent structure) in each of its lobes or a single pyrenoid in the middle of the cell. The nucleus is found in the conjoined area of semicells (isthmus). After cell division daughter cells stick together so that the filament in question increases in length. Moreover, cell filaments are markedly twisted, to be seen from a gradual shift in position of the cellular lobe facing the observer. In case of conjugation (almost) all cells in the paired filaments are sexually activated, resulting in a series of zygospores coupling the empty cell filaments
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is one of the filamentous desmid genera characterized by rather firm intercellular connections. Cells connect to adjoining cells at the flat, apical face of the cells. The cells can be longer or shorter than wide. A median constriction of the cells may appear either as distinct or faint.
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The genus name of
Desmidium - derived from the Greek word 'desmos' (= ribbon, chain or bond) - presumably gave rise to the family name of Desmidiaceae.
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516:. You can help Knowledge (XXG) by
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223:. Data extracted from the
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277:Index Nominum Genericorum
253:Guiry, M.D.; Guiry, G.M.
226:"NCBI taxonomy resources"
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50:Scientific classification
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512:-related article is a
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221:webpage on Desmidium
272:AlgaTerra database
146:D. sp. UTEX LB 612
42:Desmidium swartzii
573:Green algae stubs
568:Charophyta genera
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288:Taxon identifiers
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518:expanding it
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233:. Retrieved
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181:Desmidiaceae
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139:D. grevillii
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110:Desmidiaceae
76:(unranked):
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510:green algae
387:iNaturalist
320:Wikispecies
177:green algae
153:D. swartzii
100:Desmidiales
557:Categories
235:2007-03-19
204:References
187:Morphology
80:Charophyta
335:AlgaeBase
326:Desmidium
296:Desmidium
264:AlgaeBase
257:Desmidium
192:Desmidium
168:Desmidium
121:Desmidium
25:Desmidium
311:Q1200794
305:Wikidata
216:See the
106:Family:
405:1354183
379:2648366
159:(more)
129:Species
116:Genus:
96:Order:
86:Class:
480:592884
467:329226
451:NZOR:
444:130975
392:200875
508:This
475:WoRMS
400:IRMNG
366:1DMMG
353:11650
340:43528
173:genus
171:is a
64:Clade
514:stub
439:NCBI
418:8844
413:ITIS
374:GBIF
361:EPPO
218:NCBI
426:NBN
348:EoL
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
