Dried vegetative filaments of Spirogyra sp., Vaucheria geminata and Nostoc calcicola died within 1/2, 1 and 4 h, respectively; those of Hormidium fluitans, Oscillatoria agardhii and Lyngbya martensiana retained under similar storage conditions viability for 3, 5 and 10 d, respectively. The viability of dried vegetative filaments of L. martensiana, O. agardhii and H. fluitans decreased on storage at 20 degrees C in the dark. L. martensiana and O. agardhii tolerated 0.8 mol/L NaCl. The resistance to desiccation in L. martensiana and O. agardhii exhibited similar dependence as that to frost, to heat and UV light. O. agardhii filaments became slightly broader and their cells developed large number of gas vacuoles when grown in 0.8 mol/L NaCl-containing medium. The water stress imposed on growing algae either on high-agar solid media or in NaCl-containing liquid media reduced hormogonium formation in L. martensiana and O. agardhii, heterocyst and akinete formation in N. calcicola and fragmentation in H. fluitans; it did not induce conjugation in Spirogyra sp. and formation of reproductive organs in V. geminata. In all studied algae the stress reduced at various levels the survival of vegetative parts. Generally, algal body form and composition rather than habitats seem to decide primarily the level of resistance against various stress conditions.

Department of Botany University of Allahabad Allahabad India

See more in PubMed

Appl Environ Microbiol. 1993 Jan;59(1):163-9 PubMed

Folia Microbiol (Praha). 1999;44(4):411-8 PubMed

World J Microbiol Biotechnol. 1993 Jan;9(1):113-6 PubMed

Folia Microbiol (Praha). 2000;45(5):439-46 PubMed

Folia Microbiol (Praha). 2000;45(1):41-4 PubMed

Bacteriol Rev. 1971 Jun;35(2):171-205 PubMed

Photochem Photobiol. 1992 Jul;56(1):17-23 PubMed

Response of short-term heat shock on photosynthetic activity of soil crust cyanobacteria

Factors controlling induction of reproduction in algae--review: the text

Nitric oxide plays a role as second messenger in the ultraviolet-B irradiated green alga Chlorella pyrenoidosa

Survival and reproduction of some blue-green and green algae as affected by sewage water, fertilizer factory effluent, brassica oil, phenol, toluene and benzene

Vegetative survival of some wall and soil blue-green algae under stress conditions

Morphological variability in selected heterocystous cyanobacterial strains as a response to varied temperature, light intensity and medium composition

Survival and reproduction in some algae under stress conditions

Motility in Oscillatoria salina as affected by different factors

Survival of blue-green and green algae under stress conditions

Nutrient stress causes akinete differentiation in cyanobacterium Anabaena torulosa with concomitant increase in nitrogen reserve substances

Vegetative survival and reproduction under submerged and air-exposed conditions and vegetative survival as affected by salts, pesticides, and metals in aerial green alga Trentepohlia aurea

Effectiveness of Cyanothece spp. and Cyanospira capsulata exocellular polysaccharides as antiadhesive agents for blocking attachment of Helicobacter pylori to human gastric cells

Zoosporangia survival, dehiscence and zoospore formation, and motility in the green alga Rhizoclonium hieroglyphicum as affected by different factors

Cell differentiation and colony alteration of an edible terrestrial cyanobacterium Nostoc flagelliforme, in liquid suspension cultures

Evaluation of Tolypothrix germplasm for phycobiliprotein content

Fatty acid composition of six freshwater wild cyanobacterial species

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

Vegetative survival, akinete and zoosporangium formation and germination in some selected algae as affected by nutrients, pH, metals, and pesticides