钙对夜间低温下番茄叶片光合作用，防御系统以及叶绿体超微结构的影响

刘玉凤; 张国显; 李天来

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Effects of Calcium on Photosynthesis, Antioxidant System, and Chloroplast Ultrastructure in Tomato Leaves Under Low Night Temperature Stress

首发时间：2014-10-23

LIUYufeng ¹
liuyufeng(1981-)，lecturer, The adversity physiology research of protected vegetables
ZHANG Guoxian ¹ LI Tianlai ¹
litianlai(1955-),professor, The adversity physiology research of protected vegetables

1、Horticulture Department, Shenyang Agricultural University, No. 120 Dongling Road, Shenhe District 110866, PR China

Abstract：The effect of exogenous CaCl2 on photosynthesis, antioxidant system, and chloroplast ultrastructure of tomato leaves under low night temperature (LNT) was investigated. Tomato seedlings were pretreated with 27 mM CaCl2, 5 mM EGTA respectively for 4 days and then exposed to LNT treatment at 6 C for 7 d. Plants treated with CaCl2 showed higher photosynthesis, increased stomatal aperture and chloroplast area, and decreased number of starch grains under LNT stress than those treated with distilled water. LNT increased the contents of superoxide radicals, hydrogen peroxide, and malondialdehyde, whereas calcium application reduced the contents of these compounds. The increase in antioxidant activities caused by LNT stress was also enhanced by the application of exogenous calcium. The opposite effects were observed with ethyleneglycol-bis-(2-aminoethyl) tetraacetic acid pretreatment. CaCl2 application improved photosynthesis in LNT-stressed plants. Such improvement was associated with increased stomatal conductance, improved antioxidant activities, and adjusted chloroplast structure. These results suggest that CaCl2 application improved photosynthesis in LNT-stressed plants. Such improvement was associated with increased stomatal conductance, improved antioxidant activities, and adjusted chloroplast structure. It provided fundamental information for further molecular mechanism research.

keywords： calcium photosynthesis chloroplast ultrastructure antioxidant system low night temperature tomato

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钙对夜间低温下番茄叶片光合作用，防御系统以及叶绿体超微结构的影响

刘玉凤 ¹
liuyufeng(1981-)，lecturer, The adversity physiology research of protected vegetables
张国显 ¹ 李天来 ¹
litianlai(1955-),professor, The adversity physiology research of protected vegetables

1、沈阳农业大学，园艺学院，110866

摘要：本文研究了外源钙素对夜间低温下番茄叶片光合作用，防御系统以及叶绿体超微结构的影响。外源钙素处理增加了夜间低温下番茄叶片光合作用，气孔孔径和叶绿体面积，降低了淀粉粒的数量；喷施外源钙素后降低了夜间低温下番茄叶片超氧阴离子、过氧化氢和丙二醛的含量；同时钙素也诱导了抗氧化酶活性的提高。而喷施钙离子抑制剂EGTA，明显抑制了钙素的效果。以上结果表明，钙素通过提高夜间低温下番茄叶片气孔导度、抗氧化酶活性以及调整叶绿体结构而提高了光合作用；此研究为将来分子机制的研究奠定基础。

关键词：钙素光合作用叶绿体结构防御系统夜间低温番茄

基金：

1. the Specialized Research Fund for the Doctoral Program of Higher Education （Grant No. 20132103120007), National Natural Science Foundation of China）

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LIUYufeng,ZHANG Guoxian,LI Tianlai. Effects of Calcium on Photosynthesis, Antioxidant System, and Chloroplast Ultrastructure in Tomato Leaves Under Low Night Temperature Stress[EB/OL]. Beijing:Sciencepaper Online[2014-10-23]. https://www.paper.edu.cn/releasepaper/content/201410-292.

No.4613944100913214****

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论文编号	201410-292
论文题目	钙对夜间低温下番茄叶片光合作用，防御系统以及叶绿体超微结构的影响
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