Neochloris: Difference between revisions
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'''''Neochloris''''' is a [[genus]] of [[green algae]] in the family [[Neochloridaceae]].<ref name="Algaebase"/> |
'''''Neochloris''''' is a [[genus]] of [[green algae]] in the family [[Neochloridaceae]].<ref name="Algaebase"/> It is found in [[freshwater]] aquatic and terrestrial soil habitats.<ref name=Bicudo_and_Menezes2006/> |
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==Description== |
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''Neochloris'' consists of spherical cells that are solitary or sometimes found in small clusters. The [[cell wall]] is thin and smooth. Cells are multinucleate (with multiple nuclei).<ref name=Deason/> Each cell has a single parietal [[chloroplast]] with one to several [[pyrenoid]]s.<ref name=Bicudo_and_Menezes2006>{{cite book | title= Gêneros de Algas de Águas Continentais do Brasil: chave para identificação e descrições | edition=2 | year=2006 | first1=Carlos E. M. |last1=Bicudo | first2=Mariângela | last2= Menezes | publisher= RiMa Editora | pages=508 | isbn= 857656064X }}</ref> |
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''Neochloris'' reproduces [[asexual reproduction|asexually]]. Reproduction occurs via [[aplanospore]]s or [[zoospore]]s. Zoospores bear two [[flagella]]; upon spore germination, the zoospore loses its flagella and becomes spherical.<ref name=Shubert2014>{{cite book |editor-first1=John D.|editor-last1=Wehr|editor-first2=Robert G.|editor-last2=Sheath|editor-first3=J. Patrick|editor-last3=Kociolek |date= 2014 |edition=2 |title= Freshwater Algae of North America: Ecology and Classification |last1= Shubert|first1=Elliot| last2=Gärtner |first2=Georg |chapter= Chapter 7. Nonmotile Coccoid and Colonial Green Algae |url= |location= |publisher= Elsevier Inc. |page= |isbn=978-0-12-385876-4 }}</ref> |
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==Taxonomy== |
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''Neochloris'' was first described by [[Richard C. Starr]] in 1955 with a single species ''[[Neochloris aquatica]]'', with more species being added by later authors. However, the genus in this circumscription was [[polyphyletic]].<ref name=Deason>{{cite journal | doi=10.1007/BF00937958 | title=Taxonomic status of the species of the green algal genus ''Neochloris'' | date=1991 | last1=Deason | first1=T. R. | last2=Silva | first2=P. C. | last3=Watanabe | first3=S. | last4=Floyd | first4=G. L. | journal=Plant Systematics and Evolution | volume=177 | issue=3–4 | pages=213–219 | s2cid=33372487 }}</ref> Species one placed in ''Neochloris'' have now been placed in two segregate genera, ''[[Ettlia]]'' and ''[[Parietochloris]]''.<ref name=Deason/> |
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''Ettlia'' and ''Parietochloris'' differ from ''Neochloris'' in being uninucleate while ''Neochloris'' ''sensu stricto'' contains multinucleate cells.<ref name=Deason/> Additional features of the [[flagellar apparatus]] are visible in [[ultrastructure]] as well. The [[basal bodies]] of the zoospore flagella in ''Neochloris'' are arranged directly opposite to each other,<ref name=Deason/> those of ''Ettlia'' are arranged in a clockwise orientation, and those of ''Parietochloris'' are arranged in a counterclockwise orientation.<ref name=Deason/> |
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==References== |
==References== |
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Revision as of 03:19, 22 September 2023
| Neochloris | |
|---|---|
Scientific classification 
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| (unranked): | Viridiplantae |
| Division: | Chlorophyta |
| Class: | Chlorophyceae |
| Order: | Sphaeropleales |
| Family: | Neochloridaceae |
| Genus: | Neochloris Starr, 1955 |
| Type species | |
| Neochloris aquatica | |
| Species[1] | |
Neochloris is a genus of green algae in the family Neochloridaceae.[1] It is found in freshwater aquatic and terrestrial soil habitats.[2]
Description
Neochloris consists of spherical cells that are solitary or sometimes found in small clusters. The cell wall is thin and smooth. Cells are multinucleate (with multiple nuclei).[3] Each cell has a single parietal chloroplast with one to several pyrenoids.[2]
Neochloris reproduces asexually. Reproduction occurs via aplanospores or zoospores. Zoospores bear two flagella; upon spore germination, the zoospore loses its flagella and becomes spherical.[4]
Taxonomy
Neochloris was first described by Richard C. Starr in 1955 with a single species Neochloris aquatica, with more species being added by later authors. However, the genus in this circumscription was polyphyletic.[3] Species one placed in Neochloris have now been placed in two segregate genera, Ettlia and Parietochloris.[3]
Ettlia and Parietochloris differ from Neochloris in being uninucleate while Neochloris sensu stricto contains multinucleate cells.[3] Additional features of the flagellar apparatus are visible in ultrastructure as well. The basal bodies of the zoospore flagella in Neochloris are arranged directly opposite to each other,[3] those of Ettlia are arranged in a clockwise orientation, and those of Parietochloris are arranged in a counterclockwise orientation.[3]
References
- ^ a b Guiry, M.D. & Guiry, G.M. (2007). "Genus: Neochloris taxonomy browser". AlgaeBase version 4.2 World-wide electronic publication, National University of Ireland, Galway. Retrieved 2007-09-25.
- ^ a b Bicudo, Carlos E. M.; Menezes, Mariângela (2006). Gêneros de Algas de Águas Continentais do Brasil: chave para identificação e descrições (2 ed.). RiMa Editora. p. 508. ISBN 857656064X.
- ^ a b c d e f Deason, T. R.; Silva, P. C.; Watanabe, S.; Floyd, G. L. (1991). "Taxonomic status of the species of the green algal genus Neochloris". Plant Systematics and Evolution. 177 (3–4): 213–219. doi:10.1007/BF00937958. S2CID 33372487.
- ^ Shubert, Elliot; Gärtner, Georg (2014). "Chapter 7. Nonmotile Coccoid and Colonial Green Algae". In Wehr, John D.; Sheath, Robert G.; Kociolek, J. Patrick (eds.). Freshwater Algae of North America: Ecology and Classification (2 ed.). Elsevier Inc. ISBN 978-0-12-385876-4.
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