Groenbladia
Genus of algae
Groenbladia is a genus of green algae, specifically of the Desmidiaceae. It has a cosmopolitan distribution in acidic, oligotrophic freshwater habitats; it may occasionally form blooms.
The genus name of Groenbladia is in honour of Rolf Leo Grönblad (1895-1962), who was a Finnish dentist and botanist (Algology), who worked in Finland.
The genus was circumscribed by Einar Johan Sigurd Teiling in Bot. Not. (1952) on page 275 in 1952.
01Description
Groenbladia forms long or short filaments of cells, which are often surrounded by a gelatinous sheath. Cells are elongate, cylindrical (sometimes narrowing towards the ends), and are up to nine times longer than broad; there may be a slight constriction at the middle of the cell (isthmus). On each side of the isthmus, there is a transverse row of pores. Each cell has two chloroplasts, which are axial, band-shaped, with one to eight pyrenoids.
Aplanospores have been reported in one species, G. neglecta; the aplanospores are yellowish and elliptical. Sexual reproduction occurs by conjugation. During conjugation, cells (i.e. gametangia) become geniculate and produce a broad tube in which the gametes fuse. Mature zygospores are quadrangular, surrounded by the conjugation tube and gametangial cell walls.
Species are distinguished based on the shape of the cells.
Sources and credits
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