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@inproceedings{1105651,
author = {Barták, Miloš and Hansen, Eric and Hazdrová, Jana and Skácelová, Kateřina and Trnková, Kateřina and Prošek, Pavel},
address = {Krakow, Poland},
booktitle = {Sborník},
edition = {1st.},
editor = {Maja Lisowska},
keywords = {lichens Arctics photosynthesis desiccation},
howpublished = {elektronická verze "online"},
language = {eng},
location = {Krakow, Poland},
pages = {1-2},
publisher = {Jagellonian University,},
title = {Photosynthetic characteristics of lichens of genus Umbilicaria from SW Greenland (Nuuk area) in reponse to thallus dehydration.},
url = {http://www.assw2013.us.edu.pl/?p=abstract},
year = {2013}
}
TY - JOUR
ID - 1105651
AU - Barták, Miloš - Hansen, Eric - Hazdrová, Jana - Skácelová, Kateřina - Trnková, Kateřina - Prošek, Pavel
PY - 2013
TI - Photosynthetic characteristics of lichens of genus Umbilicaria from SW Greenland (Nuuk area) in reponse to thallus dehydration.
PB - Jagellonian University,
CY - Krakow, Poland
KW - lichens Arctics photosynthesis desiccation
UR - http://www.assw2013.us.edu.pl/?p=abstract
L2 - http://www.assw2013.us.edu.pl/?p=abstract
N2 - 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
ER -
BARTÁK, Miloš, Eric HANSEN, Jana HAZDROVÁ, Kateřina SKÁCELOVÁ, Kateřina TRNKOVÁ a Pavel PROŠEK. Photosynthetic characteristics of lichens of genus Umbilicaria from SW Greenland (Nuuk area) in reponse to thallus dehydration. In Maja Lisowska. \textit{Sborník}. 1st. Krakow, Poland: Jagellonian University,. s.~1-2. 2013.
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