Koliella

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Koliella
Koliella longiseta.jpg
Koliella longiseta
Scientific classification OOjs UI icon edit-ltr.svg
Clade: Viridiplantae
Division: Chlorophyta
Class: Trebouxiophyceae
Order: Prasiolales
Family: Koliellaceae
Genus: Koliella
Hindák
Type species
Koliella spiculiformis
(Vischer) Hindák [1]
Species

Koliella is a genus of green algae in the order Prasiolales. [2] [3] [4] Members of this genus are found in freshwater plankton, but some are also found on snow and ice. [5]

Contents

The genus name of Koliella is in honour of Erszébet (Elizabet) Kol (1897-1980), who was a Hungarian botanist (Mycology and Algology), who worked at the Hungarian National Museum in Budapest. [6]

The genus was circumscribed by František Hindák in Nova Hedwigia vol.6 (issues 1/2) on page 99 in 1963.

Description

Koliella consists of straight or curved spindle-shaped or needle-shaped cells. The apices may be rounded, obtuse, acute, or sharply pointed. Cells contain a single parietal chloroplast lining the inside of the cell, which may be straight or spiraled; a pyrenoid may be present or absent. Oil droplets are also present within the cell. [5]

Koliella reproduces vegetatively by cell division; cells usually detach after division, but may, but may occasionally be found in short chains. It is similar to a number of fusiform green algal genera, such as Monoraphidium , Ankistrodesmus , and Schroederia but the cell division is transverse, dividing into two shorter cells. [7] It also reproduces asexually by producing zoospores, which are biflagellate. Sexual reproduction occurs in this genus, and is oogamous, but not much details are known. [5]

Taxonomy

Koliella is similar to the genus Raphidonema , and is primarily distinguished from the latter genus in that its cells detach after division (while Raphidonema forms filaments of cells). [5] Some taxonomists suggest that the difference between the two genera is too small to warrant separation, and that Koliella should be considered a synonym of Raphidonema. [1] For example, filaments of Raphidonema often separate into single cells akin to Koliella when placed in a liquid medium. [8]

As currently defined, the genus Koliella is polyphyletic; the type species K. spiculiformis is closely related to Chlorella while other species (K. longiseta and K. sempervirens) appear to be more closely related to Stichococcus . [9]

Related Research Articles

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The Trebouxiophyceae, also known as trebouxiophytes, are a class of green algae, in the division Chlorophyta. Members of this class are single-celled, colonial, or multicellular and are found in freshwater or terrestrial habitats worldwide. Many taxa in the Trebouxiophyceae form symbiotic relationships with other organisms; in particular, the majority of phycobionts within lichens are trebouxiophytes.

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<span class="mw-page-title-main">Selenastraceae</span> Family of algae

Selenastraceae is a family of green algae in the order Sphaeropleales. Members of this family are common components of the phytoplankton in freshwater habitats worldwide. A few species have been found in brackish and marine habitats, such as in the Baltic Sea.

<i>Ankistrodesmus</i> Genus of algae

Ankistrodesmus is a genus of green algae in the family Selenastraceae. It is one of the most common types of phytoplankton in freshwater habitats around the world. The name Ankistrodesmus comes from the Greek roots ankistron, meaning "cross", and desmos, meaning "bond".

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Characiosiphon is a genus of green algae in the family Characiosiphonaceae. It contains a single species, Characiosiphon rivularis.

Lobocharacium is a genus of green algae in the family Characiosiphonaceae. It contains the single species Lobocharacium coloradoense. It has been isolated from a pond in Colorado, United States.

<i>Nephroselmis</i> Genus of algae

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Podohedriella is a genus of green algae in the family Selenastraceae. It is found in freshwater habitats or on damp wood.

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Raphidocelis is a genus of green algae in the family Selenastraceae. They are found in freshwater habitats.

<i>Selenastrum</i> Genus of algae

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<span class="mw-page-title-main">Klebsormidiaceae</span> Family of algae

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<i>Phacus</i> Genus of algae

Phacus is a genus of unicellular excavates, of the phylum Euglenozoa, characterized by its flat, leaf-shaped structure, and rigid cytoskeleton known as a pellicle. These eukaryotes are mostly green in colour, and have a single flagellum that extends the length of their body. They are morphologically very flat, rigid, leaf-shaped, and contain many small discoid chloroplasts.

<i>Raphidonema</i> (alga) Genus of algae

Raphidonema is a genus of filamentous green alga comprising five species. It is a member of the Trebouxiophyceae.

Chlorolobion, sometimes spelled Chlorolobium, is a genus of algae belonging to the family Selenastraceae. The species of this genus are found in freshwater habitats in Europe and America.

References

  1. 1 2 Guiry, M.D.; Guiry, G.M. "Raphidonema". AlgaeBase . World-wide electronic publication, National University of Ireland, Galway. Retrieved 2024-12-01.
  2. ↑ Guiry, M.D.; Guiry, G.M. "Koliella". AlgaeBase . World-wide electronic publication, National University of Ireland, Galway.
  3. ↑ Katana, A.; Kwiatowski, J.; Spalik, K.; Zakryś, B.; Szalacha, E.; Szymańska, H. (2001). "Phylogenetic position of Koliella (Chlorophyta) as inferred from nuclear and chloroplast small subunit rDNA". Journal of Phycology. 37 (3): 443–451. doi:10.1046/j.1529-8817.2001.037003443.x. S2CID   84445729.
  4. ↑ See the taxonomy in the UniProt web
  5. 1 2 3 4 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.
  6. ↑ Burkhardt, Lotte (2022). Eine Enzyklopädie zu eponymischen Pflanzennamen [Encyclopedia of eponymic plant names](pdf) (in German). Berlin: Botanic Garden and Botanical Museum, Freie Universität Berlin. doi:10.3372/epolist2022. ISBN   978-3-946292-41-8. S2CID   246307410 . Retrieved January 27, 2022.
  7. ↑ Matthews, Robin A. (2016). "Freshwater Algae in Northwest Washington, Volume II, Chlorophyta and Rhodophyta". A Collection of Open Access Books and Monographs. Western Washington University. doi:10.25710/fctx-n773.
  8. ↑ Yakimovich, Kurt M.; Gauthier, Nick P.G.; Engstrom, Casey B.; Leya, Thomas; Quarmby, Lynne M. (2021). "A Molecular Analysis of Microalgae from Around the Globe to Revise Raphidonema (Trebouxiophyceae, Chlorophyta)". Journal of Phycology. 57 (5): 1419–1432. Bibcode:2021JPcgy..57.1419Y. doi:10.1111/jpy.13183. PMID   33988850.
  9. ↑ Katana, Agnieszka; Kwiatowski, Jan; Spalik, Krzysztof; Zakryś, Bożena; Szalacha, Elżbieta; Szymańska, Hanna (2001). "Phylogenetic position of Koliella (Chlorophyta) as inferred from nuclear and chloroplast small subunit rDNA". Journal of Phycology. 37 (3): 443–451. Bibcode:2001JPcgy..37..443K. doi:10.1046/j.1529-8817.2001.037003443.x.
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