外源Ca²⁺、La³⁺和EGTA处理对辣椒叶片热激反应的影响

外源Ca 2+ 、La 3+ 和EGTA处理对辣椒叶片热激反应的影响 Effects of Ca 2+ ,La 3+ and EGTA Treatments on the Responses of Pepper Leaves to Heat Stress 张宗申 ZHANG Zong\|shen 1 first-author 利容千 LI Rong\|qian 1 王建波 WANG Jian\|bo 1 武汉大学生命科学学院,武汉,430072 武汉大学生命科学学院,武汉,430072 College of Life Sciences, Wuhan University College of Life Sciences, Wuhan University 以湘研十号辣椒为材料 ,研究了外源 Ca2 +、L a3+和 EGTA处理对热胁迫下叶片生理代谢的影响 .结果表明 :Ca2 +处理能降低热胁迫下细胞质膜的透性 ,而 L a3+和 EGTA处理略增加了细胞质膜透性 ;Ca2 +处理能够降低 As A和 GSH在热胁迫下的氧化 ,而 L a3+和 EGTA处理却没有这种作用 ;Ca2 +处理的叶绿素 a和叶绿素 b在热胁迫下降解较慢 ,L a3+和 EGTA处理的则降解较快 .本文认为 ,Ca2 +处理能够提高辣椒叶片的抗热性 ,而 L a3+和 EGTA处理却在一定程度上降低了其抗热性 . The young pepper （cv. Xingyan10） leaves were treated with CaCl 2, LaCl 3 and EGTA solutions, then the effect of chemical treatment on the physiological metabolism in the leaves was investigated. The results show that the treatment with Ca 2+ can lessen the damage of cell membrane caused by heat stress, and reduce the amount of GSH and AsA consumed by active oxygen radicals, while the change of chlorophyll content in the treated leaves is the same as it in the control. But the effect of LaCl 3 and EGTA treatments on these items is different from what Ca 2+ treatment does. The above results suggest that, to some extent, Ca 2+ treatment can enforce the resistance to heat stress. 辣椒 热胁迫 Ca2+ La3+ EGTA pepper heat stress Ca 2+ La 3+ EGTA 10.14188/j.1671-8836.2000.02.032 S641.3 国家自然科学基金(61672102);湖北省自然科学基金资助项目!（ 99J0 84） 2000-02-01 2021-04-01 2