Photoinhibition of photosynthesis in Antarctic lichen Usnea antarctica. I. Light intensity- and light duration-dependent changes in functioning of photosystem II

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F12%3A00061543" target="_blank" >RIV/00216224:14310/12:00061543 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sci.muni.cz/CPR/3cislo/Ocenasova-web.pdf" target="_blank" >http://www.sci.muni.cz/CPR/3cislo/Ocenasova-web.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Photoinhibition of photosynthesis in Antarctic lichen Usnea antarctica. I. Light intensity- and light duration-dependent changes in functioning of photosystem II

Popis výsledku v původním jazyce

The paper deals with the differences in sensitivity of Antarctic lichen to photoinhibition. Thalli of Usnea antarctica were collected at the James Ross Island, Antarctica (57 deg 52 57 W, 63 deg 48 02 S) and transferred in dry state to the Czech Republic. After rewetting in a laboratory, they were exposed to 2 high light treatments: short-term (30 min), and long-term (6 h). In short-term treatment, the sample were exposed to 1000 and 2000 micromol m-2 s-1 of photosynthetically active radiation (PAR). Inlong-term experiment, PAR of 300, 600, and 1000 micromol m-2 s-1 were used. Photosynthetic efficiency of U.antarctica thalli was monitored by chlorophyll fluorescence parameters, potential (FV/FM) and actual (Phi PSII) quantum yield of photochemical processes in photosystem II in particular. In short-term treatments, the F0, FV and FM signals, as well as the values of FV/FM, and Phi PSII showed light-induced decrease, however substantial recovery after consequent 30 min. in dark.

Název v anglickém jazyce

Photoinhibition of photosynthesis in Antarctic lichen Usnea antarctica. I. Light intensity- and light duration-dependent changes in functioning of photosystem II

Popis výsledku anglicky

The paper deals with the differences in sensitivity of Antarctic lichen to photoinhibition. Thalli of Usnea antarctica were collected at the James Ross Island, Antarctica (57 deg 52 57 W, 63 deg 48 02 S) and transferred in dry state to the Czech Republic. After rewetting in a laboratory, they were exposed to 2 high light treatments: short-term (30 min), and long-term (6 h). In short-term treatment, the sample were exposed to 1000 and 2000 micromol m-2 s-1 of photosynthetically active radiation (PAR). Inlong-term experiment, PAR of 300, 600, and 1000 micromol m-2 s-1 were used. Photosynthetic efficiency of U.antarctica thalli was monitored by chlorophyll fluorescence parameters, potential (FV/FM) and actual (Phi PSII) quantum yield of photochemical processes in photosystem II in particular. In short-term treatments, the F0, FV and FM signals, as well as the values of FV/FM, and Phi PSII showed light-induced decrease, however substantial recovery after consequent 30 min. in dark.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EF - Botanika

OECD FORD obor

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Projekt

<a href="/cs/project/LM2010009" target="_blank" >LM2010009: Projekt CzechPolar - České polární stanice: Stavba a operační náklady</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Czech Polar Reports

ISSN

1805-0689

e-ISSN

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Svazek periodika

2

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

10

Strana od-do

42-51

Kód UT WoS článku

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EID výsledku v databázi Scopus

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