Simultaneous measurements of PSII activity and thallus temperature during linear cooling. A method to assess interspecific differences in photosynthetic processes in lichens from polar regions.
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F14%3A00076590" target="_blank" >RIV/00216224:14310/14:00076590 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—
Alternative languages
Result language
angličtina
Original language name
Simultaneous measurements of PSII activity and thallus temperature during linear cooling. A method to assess interspecific differences in photosynthetic processes in lichens from polar regions.
Original language description
A comparison of cryoresistance of isolated lichen photobiont and polar lichens is presented. Several species were chosen for this experiment: (1) algal cultures of Trebouxia glomerata, Trebouxia sp. (2) thalli of Usnea antarctica, Usnea aurantiaco-atra,Usnea longissima, Umbilicaria decussata, Umbilicaria cylindrica. All the samples were exposed to temperatures linearly decreasing from +20 °C to -40 °C under controlled conditions. During the experiment, sample temperature and two parameters of chlorophyll fluorescence ? (1) potential (FV/FM) and (2) effective quantum yield of photochemical processes in photosystem II (YieldPSII) ? were measured simultaneously. Cooling was provided by a KRYO 560-16 (PLANER, United Kingdom) device. For majority of samples, two cooling rates were used: 6 °C min-1 (fast) and 2 °C min-1 (slow) were used. The chlorophyll fluorescence was measured by a PC-linked PAM 2000 fluorometer (H. Walz, Germany). Measurements of YieldPSII were made every 30 s.
Czech name
—
Czech description
—
Classification
Type
O - Miscellaneous
CEP classification
EF - Botany
OECD FORD branch
—
Result continuities
Project
<a href="/en/project/LM2010009" target="_blank" >LM2010009: CzechPolar ? Czech Polar Stations: Construction and management</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů