Detailed Information on Publication Record
2013
Photosynthetic characteristics of lichens of genus Umbilicaria from SW Greenland (Nuuk area) in reponse to thallus dehydration.
BARTÁK, Miloš, Eric HANSEN, Jana HAZDROVÁ, Kateřina SKÁCELOVÁ, Kateřina TRNKOVÁ et. al.Basic information
Original name
Photosynthetic characteristics of lichens of genus Umbilicaria from SW Greenland (Nuuk area) in reponse to thallus dehydration.
Name in Czech
Fotosyntetické charakteristiky ve vztahu k dehydraci stélky u lišejníků rodu Umbilicaria z jihozápadního Grónska (oblast Nuuk)
Authors
BARTÁK, Miloš, Eric HANSEN, Jana HAZDROVÁ, Kateřina SKÁCELOVÁ, Kateřina TRNKOVÁ and Pavel PROŠEK
Edition
1st. Krakow, Poland, Sborník, p. 1-2, 2 pp. 2013
Publisher
Jagellonian University,
Other information
Language
English
Type of outcome
Stať ve sborníku
Field of Study
10600 1.6 Biological sciences
Country of publisher
Poland
Confidentiality degree
není předmětem státního či obchodního tajemství
Publication form
electronic version available online
References:
Organization unit
Faculty of Science
Keywords (in Czech)
lišejníky Arktida fotosyntéza vysychání
Keywords in English
lichens Arctics photosynthesis desiccation
Tags
Reviewed
Změněno: 8/5/2013 08:25, prof. Ing. Miloš Barták, CSc.
V originále
Thalli of foliose epilithic lichens Umbilicaria arctica and U.hyperborea were collected on the rocks at several locations in the neighbourhood of Nuuk, and transported to the Czech Republic where kept in dry state in dark at 5 oC before experiments. After 48 h rehydration, simultaneous measurements of (1)effective quantum yield (YieldPSII) of photosystem II, (2)photochemical reflectance index (PRI), (3)normalized difference vegetation index (NDVI), (4)chlorophyll fluorescence fast kinetics (OJIP) were made in response to gradual thallus dehydration expressed as water potential (WP). Dehydration-response curves of YieldPSII showed S-curve relationship. In both species, the first signs of inhibition of photosynthetic processes appeared at WP of about -10 MPa. Further dehydration led to a decrease in YieldPSII and, finally, full inhibition of PSII photochemical photosynthetic processes. Critical point for PSII processes was found at WP of about -25 MPa, similarly to other epilithic lichens investigated by this method
In Czech
Vyl studován vztah mezi fůznými fotosyntetickými charakteristikami lišejníků Umbilicaria arctica a Umbilicaria Hyperboera ve vztahu k vyschnutí stélky.
Links
| 1-7/2009-14, interní kód MU |
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