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《Plant Physiology Journal》 2014-12
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Effect of High Temperature on Activities of Enzymes Associated with Starch Synthesis and Hormones Contents in Endosperm of Rice

ZHANG Gui-Lian;LIAO Bin;WU Xiao-Jin;XIAO Ying-Hui;XIAO Lang-Tao;CHEN Li-Yun;College of Agronomy,Hunan Agricultural University;Post-Doctoral Innovation Base of Agricultural Science and Technology Promotion Center of Longgang District,Shenzhen;Hunan Provincial Key Laboratory of Phytohormones and Growth Development,Hunan Agricultural University;  
The experiment was carried out in growth chamber to investigate the effect of high temperature on the activities of the key enzymes associated with starch synthesis and hormone contents in endosperm of two rice(Oryza sativa) lines including the heat-tolerant line 996 and heat-sensitive line 4628. The results showed that AGPase, SSS and SBE enzyme activities increased under high temperature stress, then decreased after the period of the peak, the decreasing extent in heat resistant line 996 was lower than that in heat sensitive line 4628. There was a signifi cant correlation between the starch accumulation rate and the AGPase, SSS activities. The ABA content increased, IAA content and Z+ZR content decreased under high temperature stress, the change scope of endogenous hormone content in heat-tolerant line 996 was greater than that of heat-sensitive line 4628.
【Fund】: 国家自然科学基金项目(30900874);; 湖南省自然科学基金项目(11JJ3026);; 湖南省教育厅优秀青年基金项目(13B052);; 作物学开放基金项目(ZWKF201301)
【CateGory Index】: S511
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