The symptomless leaf infection with grapevine leafroll associated virus 3 in grown in vitro plants as a simple model system for investigation of viral effects on photosynthesis.
作者： Ivan Christov , Detelin Stefanov , Tsvetan Velinov , Vasilii Goltsev , Katya Georgieva
DOI: 10.1016/J.JPLPH.2005.11.016
关键词: Botany 、 Chlorophyll fluorescence 、 Virus 、 Microbiology 、 Thylakoid 、 Photosynthesis 、 In vitro 、 Chlorophyll 、 Biology 、 Oxygen evolution 、 Quenching (fluorescence)
摘要: The photosynthetic changes evaluated by oxygen evolution, chlorophyll fluorescence, photoacoustics, and delayed fluorescence (DF) were studied in leaves of grown vitro for 8 weeks grapevine plants (Vitis vinifera) infected leafroll-associated virus 3 (GLRaV-3). characterized during the viral infection without visible disease symptoms. symptomless led to a decrease plant biomass. non-photochemical quenching, qN, declined, whereas photochemical qP, Chl a/b ratio not significantly affected. Photoacoustic evolution measurements showed that energy storage rate decreased leaves. Enhanced alternative electron sinks also estimated. DF temperature curves demonstrated an enhanced stability thylakoid membranes This effect was clearly expressed at high actinic light intensities. used present study as simplified model system allow avoid involvement different environmental factors could interfere with GLRaV virus-grapevine interactions. Thus, 'pure' impact on photosynthesis be investigated.
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