. . "Photosynthetic electron transport at low temperatures in the green algal foliose lichens Lasallia pustulata and Umbilicaria hirsuta affected by manipulated levels of ribitol" . "333380" . . "Photosynthetic electron transport at low temperatures in the green algal foliose lichens Lasallia pustulata and Umbilicaria hirsuta affected by manipulated levels of ribitol"@en . "14310" . . "Photosynthetic electron transport at low temperatures in the green algal foliose lichens Lasallia pustulata and Umbilicaria hirsuta affected by manipulated levels of ribitol"@en . . . "3"^^ . . . "CZ - \u010Cesk\u00E1 republika" . . "P(GP206/03/P140), P(KJB601630808)" . "Photosynthetica" . "3"^^ . "In lichens, ribitol is known as a carbon storage compound, an osmotic agens involved effectively in cell compartments protection during dehydration of lichen thalli and as a cryoprotective compound. In our study, we investigated the effect of ribitol on photochemical processes of photosynthesis in foliose lichens [Lasallia pustulata (L.) M,rat., Umbilicaria hirsuta (Sw. ex Westr.) Hoffm.] at low temperature. The effects of three concentrations of ribitol, added externally to thalli segments on several chlorophyll (Chl) fluorescence parameters, were evaluated. The 72 h exposition to 8, 16, and 26 mM ribitol led to a concentration-dependent increase in F-V/F-M, decrease in non-photochemical quenching (NPQ) but no change in quantum yield of photosystem II photochemistry (I broken vertical bar(PSII)) values at -5 A degrees C). At higher temperature (0, +5 A degrees C), no effect of ribitol addition on the photosynthetic parameters was apparent."@en . "2" . "47" . "6"^^ . . . . "Bart\u00E1k, Milo\u0161" . "In lichens, ribitol is known as a carbon storage compound, an osmotic agens involved effectively in cell compartments protection during dehydration of lichen thalli and as a cryoprotective compound. In our study, we investigated the effect of ribitol on photochemical processes of photosynthesis in foliose lichens [Lasallia pustulata (L.) M,rat., Umbilicaria hirsuta (Sw. ex Westr.) Hoffm.] at low temperature. The effects of three concentrations of ribitol, added externally to thalli segments on several chlorophyll (Chl) fluorescence parameters, were evaluated. The 72 h exposition to 8, 16, and 26 mM ribitol led to a concentration-dependent increase in F-V/F-M, decrease in non-photochemical quenching (NPQ) but no change in quantum yield of photosystem II photochemistry (I broken vertical bar(PSII)) values at -5 A degrees C). At higher temperature (0, +5 A degrees C), no effect of ribitol addition on the photosynthetic parameters was apparent." . . . . "H\u00E1jek, Josef" . . "[BB02C3332EB3]" . "RIV/00216224:14310/09:00028580!RIV10-AV0-14310___" . "chlorophyll fluorescence imaging; freezing tolerance; photosystem II; polyols"@en . "0300-3604" . "Photosynthetic electron transport at low temperatures in the green algal foliose lichens Lasallia pustulata and Umbilicaria hirsuta affected by manipulated levels of ribitol" . "000268951600005" . "V\u00E1czi, Peter" . . . "RIV/00216224:14310/09:00028580" . .