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THE ANALYSIS OF ULTRASTRUCTURE OF PHOTOSYNTHETIC MEMBRANE ON CREMAVTHODIUM DISCOIDEUM ANDACONITUM TANGUTCUM IN ALPINE PLANT

Wu Xueming(Qinghai Normal University , Xinning 810008 )  
The analysis of the ultrastructure of the photosynthetic membrane of mesophyll cellof Cremanthodium discoideum and Aconitum tangutcum,which grew on the northeast ofQinghai--Tibet plateau,3700 m above sea level,shows that the chloroplast membraneappears abnormal. The thylakoids of stroma and grana have unusual expansion. The degreeof overlap of grana lamella is smaller than that of normal condition. The characteristicson ultrastructure of chloroplast are the results of the long time illfluence,such as,highsea level,super--cold, low pressure gradient and intensive radiation and other ecologicalfactors on Qinghai--Tibet plateau.
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