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
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.