Antenna Size Dependency of Photoinactivation of Photosystem II in Light-Acclimated Pea Leaves
نویسندگان
چکیده
منابع مشابه
Photoinactivation of Photosystem II at low light intensity
We studied the effect of low light intensity on Photosystem II (PSII) of thylakoid membranes isolated form spinach. The application of low frequency single turnover flashes results in the decreased oxygen evolving activity of PSII. This effect was explained in the framework of a model, which assumes that saturating visible light flashes at low frequency can result in the degradation of the D1 p...
متن کاملProtection of Photosystem II by Light in Heat-Stressed Pea Leaves
M odulated 685-nm chlorophyll fluorescence was measured under steady-state conditions in pea leaves adapted to m oderate actinic light. W hen the m easurem ents were perform ed after a short exposure to heat (42 °C) in darkness, the maximal (Fm) and steady-state (Fs) fluorescence levels were dram atically and irreversibly quenched whereas the basic fluorescence F0 rem ained unchanged. C oncom i...
متن کاملSupramolecular organization of photosystem II and its light-harvesting antenna in partially solubilized photosystem II membranes.
We present an extended analysis of the organization of green plant photosystem II and its associated light-harvesting antenna using electron microscopy and image analysis. The analysis is based on a large dataset of 16 600 projections of negatively stained PSII-LHCII supercomplexes and megacomplexes prepared by means of three different pretreatments. In addition to our previous work on this sys...
متن کاملPhotoinactivation of Photosystem II in Prochlorococcus and Synechococcus
The marine picocyanobacteria Synechococcus and Prochlorococcus numerically dominate open ocean phytoplankton. Although evolutionarily related they are ecologically distinct, with different strategies to harvest, manage and exploit light. We grew representative strains of Synechococcus and Prochlorococcus and tracked their susceptibility to photoinactivation of Photosystem II under a range of li...
متن کاملDevelopment of Photosystem I and Photosystem II Activities in Leaves of Light-grown Maize (Zea mays).
To compare chloroplast development in a normally grown plant with etiochloroplast development, green maize plants (Zea mays), grown under a diurnal light regime (16-hour day) were harvested 7 days after sowing and chloroplast biogenesis within the leaf tissue was examined. Determination of total chlorophyll content, ratio of chlorophyll a to chlorophyll b, and O(2)-evolving capacity were made f...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1997
ISSN: 1532-2548,0032-0889
DOI: 10.1104/pp.115.1.151