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J Integr Plant Biol, 1996, 38 (5): -, Research Article
In Vitro Heat Stability of Plasma Membrane Vesicles and Tonoplast Membrane Vesicles Isolated From the Hypocotyle of Phaseolus vulgaris
Liu Jian, Yang Xiao-he and Wu Xian-rong
doi:
Abstract
Microsome, plasma membrane vesicles and tonoplast membrane vesicles were isolated from the hypocotyles of Phaseolus vulgaris L. 85CT-49762, with very high heat tolerance potential. Comparing the H+-pump heat stability in vitro of the vesicles from the heat acclimated cells and the cells in which protein synthesis was inhibited by actidion during heat acclimation with that of normal cells, the authors found that heat acclimation could increase the heat stability of membrane vesicles, and that the heat shock proteins synthesized during heat acclimation were related to the effect. The authors further analysed the role of membrane peripheral proteins on H+-pump thermotolerance of membrane vesicles, and proved that heat shock protein HSP 70 and low molecular weight heat shock protein (LMW HSP) were able to protect H+-pump from heat destruction.
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