Abstract
Vegetative cells in dried, mucilagenous mass ofGloeocapsa aeruginosa andAphanothece nidulans, reticulum ofHydrodictyon reticulatum, mucilagenous mass ofChroococcus minor, and filaments ofOedogonium sp. andScytonema hofmanni died within 1/2, 1/2, 1/2, 1, 3 and 6 h, respectively, while dried vegetative filaments ofPhormidium foveolarum retained under similar storage conditions viability for 4 d.P. foveolarum tolerated 1 mol/L NaCl. The resistance to desiccation inP. foveolarum exhibited similar dependence as that to heat or UV light. The water stress imposed on growing algae either on high-agar solid media or in NaCl-containing liquid media reduced at various levels or altogether inhibited the survival of vegetative parts in all, the cell division inC. minor, G. aeruginosa andA. nidulans, formation of heterocyst and false branch inS. hofmanni, oogonium inOedogonium sp., and daughter net inH. reticulatum. Heat or UV shock of any level also produced similar effects as that by water stress.P. foveolarum tolerated low light level of 10 and 2 µmol m−2 s−1 and no light longer than the rest of other algae studied. Tolerance of microalgal forms to water, heat or UV stress depends primarily upon cell-wall characteristics or cell-sap osmotic properties rather than their habitats, morphology and prokaryotic or eukaryotic nature.
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Agrawal, S.C., Pal, U. Viability of dried vegetative cells or filaments, survivability and/or reproduction under water and light stress, and following heat and UV exposure in some blue-green and green algae. Folia Microbiol 48, 501–509 (2003). https://doi.org/10.1007/BF02931332
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DOI: https://doi.org/10.1007/BF02931332