Woronichinia
| Generic name: WORONICHINIA Elenkin, 1933. Trudy Bot. Inst. Akad. Nauk SSSR, ser. 2, Sporov. Rast. 1: 28. |
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| Type species: Woronichinia naegeliana (Unger)Elenkin, 1933. - About 14 species, several need revision. |
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| Descriptions: Komárek & Anagnostidis (1998): Colonies more or less spherical or irregular oval, commonly composed of subcolonies, free-living, usually with a narrow, colourless enveloping mucilaginous layer. In the center of colonies is a system of radially and more or less parallely oriented, simple, unbranched stalks, which split along their whole length after cell division; stalks thick, usually as wide as the width of cells, commonly densely packed together and so causing the radial lamellation of the central colonial mucilage (staining !); the stalk system sometimes diffluent within old colonies. Cells rarely almost spherical, usually slightly elongate, widely oval, oval or obovoid, separating from one another immediately after division, but in old colonies very densely, radially aggregated in the peripheral layer. Komárek (1992): Unicellular - colonial; colonies microscopic, +/- spherical or irregularly oval, usually composed from subcolonies, free living (plankton, metaphyton), with +/- narrow enveloping mucilaginous layer. Within colonies is developed a system of parallely and radially oriented tube-like stalks,+/- originating all from the centre of a colony; stalks are +/- thick, later widened as is the width of the cells and causing the radial lamellation of the mucilage (staining !); the stalk system lateral diffluents in the centre. Cells +/- radially elongated, joined to the ends (or within) of stalks, widely oval or slightly obovoid, in old colonies usually very densely, radially agglomerated in the peripheral layer. Cells pale blue-green or yellowish, in 5 species with aerotopes (obligatorily or facultatively). |
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| Genotype differences, molecular data: | ||||||||||
| Reproduction strategies, life cycles, cell division: Komárek & Anagnostidis (1998): Cell division in two planes perpendicular to one another in successive generations, and perpendicular to the colony surface; reproduction by disintegration of colonies and especially by liberation of solitary cells (sometimes spontaneously) from the colony (expulsingcells). Komárek (1992): Cell division in two directions in successive generations, perpendicular to each other and to the surface of the colony, immediately after division separating from one another. Reproduction by the disintegration of colonies and by the liberation of solitary cells (sometimes by their almost spontaneous "expulsion") from the colony (mainly at the end of the life cycle or in stress situations). |
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| Ultrastructure: | ||||||||||
| Taxonomic position, higher hierarchy: Cyanophyceae, Chroococcales, Merismopediaceae, Gomphosphaerioideae Notes to taxonomy, misinterpretations: |
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| Ecology, ecophysiology, ecological significance: Komárek (1992): Almost all species are planktic or tychoplanktic,less metaphytic or epipelic, few are known only from limited areas in the Europe (Scandinavian lakes, clear swamps in central Europe, etc.), from North America or from Himalayas. Three species with obligatory possessing aerotopes cause occasional "water blooms" in eutrophized reservoirs, two in temperate zones, one in tropics. |
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| Physiology and biochemistry: |
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| Distribution, endemism, problematic citations: |
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| Reference strain: |
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| Infrageneric scheme, species concept: |
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| List of species: Woronichinia botrys (Skuja) Komárek et Hindák 1988 Woronichinia compacta (Lemmermann) Komárek et Hindák 1988 Woronichinia delicatula (Skuja) Komárek et Hindák 1988 Woronichinia elorantae Komárek et Komárková-Legnerová 1992 Woronichinia fremyi (Komárek) Komárek et Hindák 1988 Woronichinia fusca (Skuja) Komárek et Hindák 1988 Woronichnia karelica Komárek et Komárková-Legnerová 1992 Woronichinia klingae Komárek et Komárková-Legnerová 1992 Woronichinia kuselae M. Watanabe et Komárek 1994 Woronichinia meiocystis (Skuja) Joosten 2006 Woronichinia naegeliana (Unger) Elenkin 1933 Woronichinia radians (Hortobágyi) Komárek et Hindák 1988 Woronichinia robusta (Skuja) Komárek et Hindák 1988 Woronichinia ruzickae Komárek et Hindák 1988 Woronichinia tenera (Skuja) Komárek et Hindák 1988 Unclear taxa: |
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Drawings: Komárek 1992 |
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Literature:
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