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当前位置: 首页 > 文章 > 外源钙对高温胁迫下花生幼苗叶绿体Ca~(2+)-ATPase、Mg~(2+)-ATPase活性及Ca~(2+)分布的影响 中国油料作物学报 2005,27 (4) 41-44+49
Position: Home > Articles > Effects of Ca~(2+) on the activities of Ca~(2+)-ATPase,Mg~(2+)-ATPasein chloroplast and Ca~(2+) distribution in peanut seedlings Chinese Journal of Oil Crop Sciences 2005,27 (4) 41-44+49

外源钙对高温胁迫下花生幼苗叶绿体Ca~(2+)-ATPase、Mg~(2+)-ATPase活性及Ca~(2+)分布的影响

作  者：
宰学明;钦佩;吴国荣;闫道良
单  位：
南京大学生命科学学院;南京师范大学生命科学学院
关键词：
Ca2+;花生幼苗;叶绿体;Ca2+-ATPase;Mg2+-ATPase;Ca2+分布
摘  要：
以10mmol/L CaC l2溶液处理花生幼苗叶片后,置于培养箱42℃高温培养,定时测定幼苗叶叶绿体Ca2+-ATPase,Mg2+-ATPase活性,并观察幼叶细胞内Ca2+分布的变化。试验结果表明,外源Ca2+处理相应提高和保护了Ca2+-ATPase,Mg2+-ATPase的活性;外源Ca2+预处理能够明显增加细胞间隙、细胞壁、质膜和叶绿体上Ca2+颗粒密度;高温胁迫后,Ca2+具有从胞外转运到胞质内和叶绿体中的趋势;Ca2+能够稳定高温胁迫下叶肉细胞膜和叶绿体的超微结构。
译  名：
Effects of Ca~(2+) on the activities of Ca~(2+)-ATPase,Mg~(2+)-ATPasein chloroplast and Ca~(2+) distribution in peanut seedlings
作  者：
ZAI Xue-Ming~(1,3),QIN Pei~1,WU Guo-rong~2,YAN Dao-liang~1(1.Nanjing University,Nanjing 210093,China;2.Nanjing Normal University,Nanjing 210097,China;3.Horticulture Dept.,Jinling Institute of Technology,Nanjing 210038,China)
关键词：
Ca~(2+);Peanut Seedlings;Chloroplast;Ca~(2+)-ATPase;Mg~(2+)-ATPase;Ca~(2+) distribution
摘  要：
Peanut seedlings sprayed with 10mmol/L CaCl_2 were cultured at 42℃,and the activities of Ca~(2+)-ATPase,Mg~(2+)-ATPase in chloroplast were measured regularly and Ca~(2+) distribution in young leafage was observed timely.The results showed that Ca~(2+) could evidently improve and protect the activities of Ca~(2+)-ATPase,Mg~(2+)-ATPase,and Ca~(2+) pretreatment could induce changes of Ca~(2+) distribution and significantly increase the Ca~(2+) level in intercellular spaces,vacuoles and chloroplasts. When calcium-treated leaves were under heat stress at 42℃,the amount of Ca~(2+) located in intercellular space decreased,and most of them transferred to cytosol and chloroplast across the plasmalemma.The results suggest that exogenous Ca~(2+) results in the stabilization of membrane and chloroplast structures under high temperature stress.

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