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The first record of snow algae vitality in situ by variable fluorescence of chlorophyll
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SYSNO ASEP 0026316 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title The first record of snow algae vitality in situ by variable fluorescence of chlorophyll Title První záznam vitality sněžných řas in situ pomocí variabilní fluorescence chlorofylu Author(s) Kvíderová, Jana (BU-J) RID, ORCID
Stibal, Marek (BU-J)
Nedbalová, Linda (BU-J) RID, ORCID
Kaštovská, Klára (BU-J)Source Title Czech Phycology - ISSN 1213-3434
Roč. 5, - (2005), s. 69-77Number of pages 9 s. Language eng - English Country CZ - Czech Republic Keywords snow algae ; fluorescence ; Chlamydomonas Subject RIV EF - Botanics R&D Projects KJB6005409 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z6005908 - BU-J Annotation Although snow algae may serve as very good model organisms for their adaptation to extreme environments, ecophysiological studies of them are rare. In our study, we measuerd the dependence of relative electron transfer rate on the irradiance of natural samples by variable fluorescence of chlorophyll directly in the field. The sample consisted mainly of zygospores of Chlamydomonas brevispina (FRITSCH) Hoh. Roem. et MULI. The cell density in the snow field (10*5 cells/ml) exceeded the lower detection limit of fluorometr. The parametrs of the dependency indicate the viability of zygospores. The values of maximum quantum yield suggest that the zygospores were not subject to serious stress and, for the firts time, proved that the resting stages of Chlamydomonas brevispina were photosynthetically active, at least at the level of primary photochemical reactions in the photosystem 2. Workplace Institute of Botany Contact Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Year of Publishing 2006
Number of the records: 1