Combined effect of  NaCl and temperature on chlorophyll fluorescence parameters in Lasallia pustulata and Umbilicaria hirsuta

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Authors	HÁJEK Josef BARTÁK Miloš
Year of publication	2003
Type	Article in Proceedings
Conference	Book of Abstracts. Plant Physiology Conference of Ph.D. Students and Young Scientists
MU Faculty or unit	Faculty of Science
Citation
Field	Botany
Keywords	lichens; photosynthesis; osmotic stress; water potential; dehydration
Description	In both lichen species measured under 22 and 5 degC, increased osmotic stress led to a decrease in Fv/Fm ratio of chlorophyll fluorescence and also in quantum yield of photosystem two. Time courses of background chlorophyll fluorescence revealed two phases of phases of osmotic stress: (1)mild - induced by water potential of about-2.3 MPa, and (b)heavy - induced by water potential of about -17.0 Mpa.
Related projects:	Limitation of photochemical and biochemical processes of photosynthesis of lichens under low temperature Ecology of the coastal vegetation