Photosynthetic activity of vascular bundles in Plantago media leaves.
作者： Zbigniew Miszalski , Andrzej Skoczowski , Ekaterina Silina , Olga Dymova , Tamara Golovko
DOI: 10.1016/J.JPLPH.2016.06.012
关键词: RuBisCO 、 Chlorophyll 、 Plantago media 、 Plastoquinone 、 Photosynthesis 、 Vascular bundle 、 Botany 、 Chemistry 、 Horticulture 、 Photosynthetic reaction centre 、 Chloroplast
摘要: Photosynthetic processes in the leaf lamina and midribs of Plantago media were investigated using plants grown high light (HL) or low (LL) conditions. The fluorescence parameters, which indicate photochemical/photosynthetic activity, different HL LL plants, but no major differences between found. An OJIP test (chlorophyll a transient induction) indicative chloroplast electron transport chain, also showed both tissues to be similar. In partial blockage flow QA (the primary plastoquinone acceptor PSII) QB secondary was found, this less visible midribs. effective dissipation quantum energy per reaction center (DI0/RC) similar while leaves, process seemed effective. Measurements 13C discrimination that midrib leaves effectively used β-carboxylation products accumulate their biomass. Thus, well protected activity with limited capacity fix CO2 from air may involvement tissue β-carboxylation, signaling. Carbon accumulated roots lower value (more negative) than values observed lamina. This could are supplied assimilates mostly during phase day cycle intensive C3 photosynthesis.
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