Yellow-green algae

Yellow-green algae are the Xanthophyceae (xanthophytes).

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]

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. Stace, Clive A. (1991). Plant taxonomy and biosystematics. Cambridge University Press. ISBN 978-0-521-42785-2.
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