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@article{1315192,
author = {Mishra, Anamika and Hájek, Josef and Tuháčková, Tereza and Barták, Miloš and Mishra, Kumud Bandhu},
article_location = {Brno},
article_number = {1},
doi = {http://dx.doi.org/10.5817/CPR2015-1-10},
keywords = {Rhizoplaca melanophtalma; Umbilicaria antarctica; Xanthoria elegans; temperaturestress},
language = {eng},
issn = {1805-0689},
journal = {Czech Polar Reports},
title = {Features of chlorophyll fluorescence transients can be used to investigate low temperature induced effects on photosystem II of algal lichens from polar regions},
url = {http://www.sci.muni.cz/CPR/9cislo/Mishra-web.pdf},
volume = {5},
year = {2015}
}
TY - JOUR
ID - 1315192
AU - Mishra, Anamika - Hájek, Josef - Tuháčková, Tereza - Barták, Miloš - Mishra, Kumud Bandhu
PY - 2015
TI - Features of chlorophyll fluorescence transients can be used to investigate low temperature induced effects on photosystem II of algal lichens from polar regions
JF - Czech Polar Reports
VL - 5
IS - 1
SP - 99-111
EP - 99-111
PB - Masarykova univerzita
SN - 18050689
KW - Rhizoplaca melanophtalma
KW - Umbilicaria antarctica
KW - Xanthoria elegans
KW - temperaturestress
UR - http://www.sci.muni.cz/CPR/9cislo/Mishra-web.pdf
L2 - http://www.sci.muni.cz/CPR/9cislo/Mishra-web.pdf
N2 - Chlorophyll fluorescence is an effective tool for investigating characteristics of any photosynthesizing organisms and its responses due to different stressors. Here, we have studied a short-term temperature response on three Antarctic green algal lichen species: Umbilicaria antarctica, Xanthoria elegans, and Rhizoplaca melanophtalma. We measured slow chlorophyll fluorescence transients in these Antarctic lichen species during slowely cooling of thallus temperature from 20°C to 5, 0 and -5°C with 20 minute acclimation at each temperature. The measurements were supplemented with saturation pulses for the analysis of chlorophyll fluorescence parameters: maximum yield of PS II photochemistry (FV/FM), effective quantum yield of PS II photochemistry ( Phi PSII) and quenching parameters. In response to decreasing thallus temperature, we observed species-specific changes in chlorophyll fluorescence parameters as well as in the shape of the chlorophyll fluorescence transients. We propose that species-specific changes in the slow phase of chlorophyll fluorescence transients can be potentially used as indicators of freezing stress in photosynthetic apparatus of lichen algal photobionts.
ER -
MISHRA, Anamika, Josef HÁJEK, Tereza TUHÁČKOVÁ, Miloš BARTÁK and Kumud Bandhu MISHRA. Features of chlorophyll fluorescence transients can be used to investigate low temperature induced effects on photosystem II of algal lichens from polar regions. \textit{Czech Polar Reports}. Brno: Masarykova univerzita, 2015, vol.~5, No~1, p.~99-111. ISSN~1805-0689. Available from: https://dx.doi.org/10.5817/CPR2015-1-10.
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