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Spirotaenia

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Spirotaenia is a genus of basal green algae that may be sister to the Chlorokybophyceae.[1] It was previously considered to be part of the Zygnemataceae. It is sexually conjugating, a mode of reproduction that was previously only known in the Zygnemataceae/Mesotaeniaceae, the sister groups to the land plants. This is surprising, as Spirotaenia is much more basal. The conjugating process is substantially aberrant.[2][3] Spirotaenia may actually be more than one distinct lineage which may not be closely related.[4]

Phylogeny

Archaeplastida

Rhodophyta (red algae)

     

Glaucophyta (glaucophyte algae)

Viridiplantae    

Mesostigmatophyta:
Mesostigmatophyceae

     

Chlorokybophyceae

   

Spirotaenia

         

Chlorophyta

Streptophytes

Klebsormidiophyceae

     

Coleochaetophyceae

     

Zygnematophyceae

     

Charophyceae (stoneworts)

   

Embryophytes

                 
groups
traditionally
included in
the "algae"

References

  1. ^ Gitzendanner, Matthew A.; Soltis, Pamela S.; Wong, Gane K.-S.; Ruhfel, Brad R.; Soltis, Douglas E. (2018). "Plastid phylogenomic analysis of green plants: A billion years of evolutionary history". American Journal of Botany. 105 (3): 291–301. doi:10.1002/ajb2.1048. ISSN 0002-9122. PMID 29603143.
  2. ^ Brook, Alan J. (1981). The Biology of Desmids. University of California Press. ISBN 9780520042810.
  3. ^ Gontcharov, Andrey A.; Melkonian, Michael (2004). "Unusual position of the genus Spirotaenia (Zygnematophyceae) among streptophytes revealed by SSU rDNA and rbcL sequence comparisons". Phycologia. 43 (1): 105–113. CiteSeerX 10.1.1.539.2139. doi:10.2216/i0031-8884-43-1-105.1. ISSN 0031-8884. S2CID 51945556.
  4. ^ COESEL, PETER; VANHOOF, ANDRÉ; MEESTERS, KOOS (2017-12-01). "Zygospore morphology in the conjugating green alga Spirotaenia diplohelica (Streptophyta, Zygnematophyceae, Mesotaeniaceae)". Phytotaxa. 329 (3): 284. doi:10.11646/phytotaxa.329.3.10. ISSN 1179-3163.
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Spirotaenia: Brief Summary

provided by wikipedia EN

Spirotaenia is a genus of basal green algae that may be sister to the Chlorokybophyceae. It was previously considered to be part of the Zygnemataceae. It is sexually conjugating, a mode of reproduction that was previously only known in the Zygnemataceae/Mesotaeniaceae, the sister groups to the land plants. This is surprising, as Spirotaenia is much more basal. The conjugating process is substantially aberrant. Spirotaenia may actually be more than one distinct lineage which may not be closely related.

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN