Modifications in photosystem II photochemistry in senescent leaves of maize plants
نویسندگان
چکیده
منابع مشابه
Changes in Photosystem II Photochemistry in Senescing Maple Leaves
Biochemical and functional changes in photosystem II (PSII) were investigated during natural senescence of maple (Acer platanoides L.) leaves. Three different types of senescing leaves were used: early senescent green (G), yellow green (YG) and yellow (Y). The main goal of this study was to investigate the dynamics of degradation of major photosynthetic proteins (D1, LHCII and Rubisco LSU) and ...
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...
متن کاملPhotosystem II photochemistry, photoinhibition, and the xanthophyll cycle in heat-stressed rice leaves.
To investigate how high light affects the responses of photosynthesis to heat stress, the effects of high temperature (25-42.5 degrees C) either in the dark or in the light (1000 micromol m(-2) s(-1)) on photosystem II (PSII) photochemistry and the xanthophyll cycle were investigated in rice plants. At temperatures higher than 35 degrees C, there was a decrease in the CO(2) assimilation rate, a...
متن کاملCharacterization of photosystem II photochemistry in transgenic tobacco plants with lowered Rubisco activase content.
Rubisco activase plays an important role in the regulation of CO(2) assimilation. However, it is unknown how activase regulates photosystem II (PSII) photochemistry. To investigate the effects of Rubisco activase on PSII photochemistry, we obtained transgenic tobacco (Nicotiana tabacum) plants with 50% (i7), 25% (i28), and 5% (i46) activase levels as compared to wild type plants by using a gene...
متن کاملEffects of water stress on photosystem II photochemistry and its thermostability in wheat plants
Key words: Chlorophyll fluorescence, heat stress, photo-system II photochemistry, water stress, wheat (Tritium Modulated chlorophyll fluorescence, rapid fluores-aestivum L.). cence induction kinetics and the polyphasic fluores-cence transients (OJIP) were used to evaluate PSII photochemistry in wheat plants exposed to water
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ژورنال
عنوان ژورنال: Journal of Experimental Botany
سال: 1998
ISSN: 1460-2431
DOI: 10.1093/jexbot/49.327.1671