Spatial pattern of low-temperature photoinhibition on thalli of Antarctic lichen species <i>Umbilicaria antarctica</i> visualized by a novel approach

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F03%3A00008875" target="_blank" >RIV/00216224:14310/03:00008875 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Spatial pattern of low-temperature photoinhibition on thalli of Antarctic lichen species <i>Umbilicaria antarctica</i> visualized by a novel approach

Popis výsledku v původním jazyce

Sensitivity of lichens to photoinhibition is believed to be more pronounced under full hydration and low temperature. In this study, we exposed Umbilicaria antarctica, a foliose Antarctic lichen species, to 30 min photoinhibitory treatment (1500 micromols m-2 s-1) under 5 degC. The extent of photoinhibition and rate of recovery were monitored as time courses of chlorophyll fluorescence parameters: Fv/Fm , PSII yield, and quenching coefficients. To visualize distribution of response of the parameters tophotoinhibitory treatment over lichen thallus, we used a FuorCam (PSI, Czech Republic) device and imaging software. The novel approach enabled to distinguish a 0.1 square mm spots (pixels) over the thallus and relate the above parameters to each of them.Physiologically-active thallus zones forming irregular star-like shapes located close to thallus center showed high sensitivity to photoinhibition but also fast recovery. Less physiologically-active marginal parts of thallus were less af

Název v anglickém jazyce

Spatial pattern of low-temperature photoinhibition on thalli of Antarctic lichen species <i>Umbilicaria antarctica</i> visualized by a novel approach

Popis výsledku anglicky

Sensitivity of lichens to photoinhibition is believed to be more pronounced under full hydration and low temperature. In this study, we exposed Umbilicaria antarctica, a foliose Antarctic lichen species, to 30 min photoinhibitory treatment (1500 micromols m-2 s-1) under 5 degC. The extent of photoinhibition and rate of recovery were monitored as time courses of chlorophyll fluorescence parameters: Fv/Fm , PSII yield, and quenching coefficients. To visualize distribution of response of the parameters tophotoinhibitory treatment over lichen thallus, we used a FuorCam (PSI, Czech Republic) device and imaging software. The novel approach enabled to distinguish a 0.1 square mm spots (pixels) over the thallus and relate the above parameters to each of them.Physiologically-active thallus zones forming irregular star-like shapes located close to thallus center showed high sensitivity to photoinhibition but also fast recovery. Less physiologically-active marginal parts of thallus were less af

Druh

D - Stať ve sborníku

CEP obor

EF - Botanika

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2003

Kód důvěrnosti údajů

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

Název statě ve sborníku

Book of Abstracts. 10th Congress of the European Society for Photobiology

ISBN

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ISSN

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e-ISSN

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Počet stran výsledku

1

Strana od-do

108

Název nakladatele

European Society for Photobiology

Místo vydání

Vienna (Austria)

Místo konání akce

Vienna (Austria)

Datum konání akce

1. 1. 2003

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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