Yellow-green algae

Yellow-green algae
Examples of xanthophytes (repair the unequal flagella in the cells)
Scientific classification Edit this classification
Domain: Eukaryota
Clade: Diaphoretickes
Clade: SAR
Phylum: Ochrophyta
Class: Xanthophyceae
Allorge, 1930,[1] emend. Fritsch, 1935[2]
Synonyms
  • Heterokontae Luther, 1899[3]
  • Heterochloridia Pascher, 1912
  • Tribophyceae Hibberd, 1981[4]
  • Heteromonadida Leedale, 1983[5]
  • Xanthophyta Hibberd, 1990[6]

Yellow-green algae are the Xanthophyceae (xanthophytes).

They are a group of heterokont algae. Most live in fresh water, but some live in marine and soil habitats. They vary from single-celled flagellates to simple colonial and filamentous forms.

Xanthophyte chloroplasts contain the photosynthetic pigments chlorophyll a, chlorophyll c, β-carotene, and the carotenoid diadinoxanthin.[7]

Unlike other heterokonts, their chloroplasts do not have fucoxanthin, which accounts for their lighter colour. Xanthophyte cell walls are made of cellulose and hemicellulose.[7] They may be the closest relatives of the brown algae.

References

  1. ↑ Allorge, P (1930). "Heterocontées ou Xanthophycées?". Rev. Alg. 5: 230.
  2. ↑ Fritsch, F.E. (1935) The Structure and Reproduction of the Algae. Volume I. Introduction, Chlorophyceae, Xanthophyceae, Chrysophyceae, Bacillariophyceae, Cryptophyceae, Dinophyceae, Chloromonadineae, Euglenineae, Colourless Flagellata. Cambridge University Press, Cambridge.
  3. ↑ Lüther, A. (1899). "Über Chlorosaccus eine neue Gattung der Süsswasseralgen". Bihang Til Kongliga Svenska Vetenskaps-Akademiens Handlingar. 24: 1–22. OCLC 178060545.
  4. ↑ Hibberd, D. J. (February 1981). "Notes on the taxonomy and nomenclature of the algal classes Eustigmatophyceae and Tribophyceae (synonym Xanthophyceae)". Botanical Journal of the Linnean Society. 82 (2): 93–119. doi:10.1111/j.1095-8339.1981.tb00954.x.
  5. ↑ Leedale, G.F. (1985). "Order 5, Heteromonadida Leedale, 1983". In Lee, John J.; Hutner, Seymour Herbert; Bovee, Eugene C. (eds.). An illustrated Guide to Protozoa. Lawrence, Kansas: Society of Protozoologists. pp. 70–.
  6. ↑ Hiberd, D. J. (1990). "Phylum Xanthophyta". In Margulis, L.; Corliss, J. O.; Melkonian, M.; et al. (eds.). Handbook of Protoctista. Boston, Massachusetts, USA: Jones and Bartlett Publishers. pp. 686–97.
  7. 1 2 Stace, Clive A. (1991). Plant taxonomy and biosystematics. Cambridge University Press. ISBN 978-0-521-42785-2.
Wikispecies has information on: Xanthophyceae.
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