yellow-green algae

yellow-green algae
a group of common single-celled and colonial algae of the phylum Chrysophyta, having mostly yellow and green pigments, occurring in soil and on moist rocks and vegetation and also as a slime or scum on ponds and stagnant waters.
Also, yellow green algae.
[1925-30]

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▪ class of algae
 members of the class Xanthophyceae (division Chromophyta), consisting of approximately 600 species, once classified with the green algae on the basis of similarity of body organization. The Xanthophyceae are distinguished by their food reserve (oil), the quantity of β-carotene in their plastids, and motile cells with unequal flagella. Frequently their cell walls are two overlapping halves. The usual method of asexual reproduction is by motile zoospores or nonmotile resting aplanospores. Sexual reproduction is rare; the genus Vaucheria is an important exception.

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Universalium. 2010.

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  • yellow-green algae — [yel′ōgrēn′] pl.n. any of a class (Xanthophyceae) of photosynthetic thallophytes that contain a yellowish or brownish pigment that obscures the chlorophyll and whose motile cells have two unequal flagella: the cell walls may contain silica …   English World dictionary

  • Yellow-green algae — Taxobox name = Yellow green algae domain = Eukaryota regnum = Chromalveolata phylum = Heterokontophyta classis = Xanthophyceae classis authority = Allorge ex FritschYellow green algae or xanthophytes are an important group of heterokont algae.… …   Wikipedia

  • yellow-green algae — noun any alga of the division Chrysophyta with its chlorophyll masked by yellow pigment • Hypernyms: ↑alga, ↑algae • Hyponyms: ↑conferva • Member Holonyms: ↑Chrysophyta, ↑division Chrysophyta * * * Biol …   Useful english dictionary

  • yellow-green algae — yel′low green al′gae n. pl. mcr bio algae of the phylum Chrysophyta, having mostly yellow and green pigments, occurring in soil, on moist rocks and vegetation, and on ponds and stagnant waters • Etymology: 1925–30 …   From formal English to slang

  • blue-green algae — Biol. a widely distributed group of predominantly photosynthetic prokaryotic organisms of the subkingdom Cyanophyta, resembling phototrophic bacteria, occurring singly or in colonies in diverse habitats: some species can fix atmospheric nitrogen …   Universalium

  • yellow-green alga — noun Date: 1930 any of a class (Xanthophyceae of the division Chrysophyta) of algae with the chlorophyll masked by brown or yellow pigment …   New Collegiate Dictionary

  • algae — algal, adj. /al jee/, n.pl., sing. alga / geuh/. any of numerous groups of chlorophyll containing, mainly aquatic eukaryotic organisms ranging from microscopic single celled forms to multicellular forms 100 ft. (30 m) or more long, distinguished… …   Universalium

  • Algae — For other uses, see Algae (disambiguation) and Alga (disambiguation). Algae Laurencia, a marine genus of Red Algae from Hawaii. Scientific classification …   Wikipedia

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