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Single-cell chlorophyll fluorescence kinetic microscopy of Pylaiella littoralis (Phaeophyceae) infected by Chytridium polysiphoniae (Chytridiomycota)

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    0099737 - MBÚ 2008 RIV GB eng J - Journal Article
    Gachon, C. M. M. - Küpper, H. - Kupper, F. C. - Šetlík, Ivan
    Single-cell chlorophyll fluorescence kinetic microscopy of Pylaiella littoralis (Phaeophyceae) infected by Chytridium polysiphoniae (Chytridiomycota).
    [Mikroskopické sledování kinetiky fluorescence u jednotlivých buněk Pylaiella litoralis (Phaeophyceae) které infikovalo Chytridium polysiphoniae (Chytridiomycota).]
    European Journal of Phycology. Roč. 41, č. 4 (2006), s. 395-403. ISSN 0967-0262. E-ISSN 1469-4433
    Institutional research plan: CEZ:AV0Z50200510
    Keywords : photosystem II * fluorescence kinetic microscopy * pylaiella littoralis
    Subject RIV: EE - Microbiology, Virology
    Impact factor: 1.293, year: 2006

    Chlorophyll fluorescence imaging is a non-invasive method to monitor the metabolic state of photosynthetic organisms. We used spatially resolved (imaging) microscopic measurements of chlorophyll fluorescence kinetics to follow the fate of individual cells of the filamentous brown alga Pylaiella littoralis infected by the biotrophic parasite Chytridium polysiphoniae (Chytridiomycota). These measurements showed strong differences between individual parameters of the inhibition of photosynthesis, revealing important details about the mechanism of damage. The dark-adapted photochemistry of photosystem II itself (measured as Fv/Fm, where Fv0,25Fm_F0) remained unaffected until a very late stage of damage to the cell, while the light-adapted efficiency of PSII electron transport decreased earlier. A particularly complex pattern was found for the changes in nonphotochemical quenching (NPQ)

    Mikroskopickým zobrazováním kinetiky fluorescence chlorofylu v buňkách vláknité hnědé řasy Pylaiella littoralis se studovaly změny ve fotosyntetickém aparátu při infekci parasitem Chytridium polysiphoniae. Výsledky ukazují, že infekce má vliv na regulaci fotosyntézy; v prvé fázi infekce fotosyntézu stimuluje, v druhé fázi všechny fotosyntetické parametry klesají. Fluorescenční parametry měřené na buňkách adaptovaných na tmu klesaly až v posledních stadiích poškození buňky
    Permanent Link: http://hdl.handle.net/11104/0158261

     
     
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