Yellow-green algae

Yellow-green algae
	Examples of xanthophytes (repair the unequal flagella in the cells)
Scientific classification
Domain:	Eukaryota
Clade:	Diaphoretickes
Clade:	SAR
Clade:	Stramenopiles
Phylum:	Gyrista
Subphylum:	Ochrophytina
Superclass:	Fucistia
Class:	Xanthophyceae; Allorge, 1930, emend. Fritsch, 1935
Synonyms
	Heterokontae Luther, 1899; Heterochloridia Pascher, 1912; Tribophyceae Hibberd, 1981; Heteromonadida Leedale, 1983; Xanthophyta Hibberd, 1990;

Yellow-green algae or the Xanthophyceae (xanthophytes) are an important group of heterokont algae. Most live in fresh water, but some are found 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 Stramenopiles (heterokonts), their chloroplasts do not contain fucoxanthin, which accounts for their lighter colour. Their storage polysaccharide is chrysolaminarin.^[7] Xanthophyte cell walls are produced of cellulose and hemicellulose.^[7] They appear to be the closest relatives of the brown algae.

^ Allorge, P (1930). "Heterocontées ou Xanthophycées?". Rev. Alg. 5: 230.
^ 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.^{[page needed]}
^ Lüther, A. (1899). "Über Chlorosaccus eine neue Gattung der Süsswasseralgen". Bihang Til Kongliga Svenska Vetenskaps-Akademiens Handlingar. 24: 1–22. OCLC 178060545.
^ 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.
^ 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–.^{[page needed]}
^ 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.
^ ^a ^b ^c Stace, Clive A. (1991). Plant Taxonomy and Biosystematics. Cambridge University Press. ISBN 978-0-521-42785-2.^{[page needed]}