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Visualization of high light effects on intrathalline variability of photosynthetic processes in hydrated <I>Lasallia pustulata</I>

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F04%3A00019780" target="_blank" >RIV/00216224:14310/04:00019780 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Visualization of high light effects on intrathalline variability of photosynthetic processes in hydrated <I>Lasallia pustulata</I>

  • Original language description

    It is expected that hydrated lichen thalli are more susceptible to negative effects of high light (HL) under low rather then optimum temperature of thallus. In our experiments, we investigated response of foliose lichen species (Lasallia pustulata) to HLstress at low temperature under laboratory conditions. Hydrated thalli were exposed to HL of 500 mmol (CO2) m-2 s-1 for 30 min under 5 oC. Response of photosynthetic parameters (Fv/Fm - potential yield of PS II photochemistry, FII - quantum yield of PSII photochemistry, qN - non-photochemical quenching, qT+I - photoinhibition-related quenching) was monitored during HL treatment and subsequent 6 h recovery in dark using chlorophyll (Chl) fluorescence imaging technique False color images of lichen thallus showing heterogeneity of the above-specified Chl fluorescence parameters over the thalli were taken using a kinetic fluorometric CCD Camera (FluorCam FL-400, PSI, Czech Republic). Subsequent image analysis allowed us to specify zones a

  • Czech name

    Vizualizace účinku vysokých hodnot ozářenosti na vnitrostélkovou variabilitu fotosyntetických procesů v ovlhčených stélkách lišejníku <I>Lasallia pustulata</I>

  • Czech description

    Heterogenita fotosyntetických procesů v závislosti na navozené fotoinhibici byla studována pomocí kinetické fluorometrické CCD kamery(FluorCam FL-400) ve stélkách lasallia pustulata. Analýza obrazu umožnila rozlišit zóny stélky vykazující díky anatomickým chrakteristikám odlišnou sensitivitu vůči fotoinhibici. Na úrovni celé stélky byl zaznamenán 23 a 20 % pokles Fv/Fm and FII. Temnotní relaxace vedla k postupnému návratu obou parametrů směrem k původním hodnotám. Byla rozlišena rychlá a pomalá fáze návratu v závislosti na konformačních, respektive resyntetických procesech.

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    EF - Botany

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

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

Others

  • Publication year

    2004

  • Confidentiality

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

Data specific for result type

  • Article name in the collection

    Book of Abstracts. 5th IAL Symposium

  • ISBN

    9985-56-922-9

  • ISSN

  • e-ISSN

  • Number of pages

    1

  • Pages from-to

    45

  • Publisher name

    University of Tartu

  • Place of publication

    Tartu, Estonia

  • Event location

    Tartu, Estonia

  • Event date

    Jan 1, 2004

  • Type of event by nationality

    WRD - Celosvětová akce

  • UT code for WoS article