生态与农村环境学报 ›› 2006, Vol. 22 ›› Issue (1): 34-37.doi:

• 论文 • 上一篇    下一篇

不同UV-C辐射时间对豌豆幼苗光合特性及抗氧化酶活性的影响

 李雪梅, 张利红, 马莲菊,  陈强, 王兰兰   

  1. 沈阳师范大学化学与生命科学学院
  • 收稿日期:2005-09-20 出版日期:2006-01-25 发布日期:2011-09-20
  • 作者简介:李雪梅(1967-),女,河北三河人,博士,副教授,主要研究方向为植物逆境生理生态。
  • 基金资助:

    国家自然科学基金重大课题资助项目(90411019);沈阳师范大学博士启动基金资助项目

Effects of duration of UV-C Radiation on Photosynthetic Characteristics and Activity of Antioxidant Enzyme in Pea Seedlings

 LI  Xue-Mei, ZHANG  Li-Hong, MA  Lian-Ju,   Chen-Qiang, WANG  Lan-Lan   

  1. College of Chemistry and Life Science,Shenyang Normal University
  • Received:2005-09-20 Online:2006-01-25 Published:2011-09-20

摘要: 研究了不同UV-C辐射时间对豌豆幼苗光合特性及抗氧化酶活性的影响。结果表明,UV-C辐射增强使叶片光合速率减弱,气孔导度、胞间CO2浓度、蒸腾速率和羧化效率明显降低,CO2补偿点升高。随着UV-C辐射时间的延长,POD和CAT活性先升高随后降低,SOD活性、叶绿素含量则逐渐降低,但丙二醛含量逐渐增加。这说明UV-C辐射增强引起抗氧化酶活性降低,使膜脂过氧化,导致光合作用减弱。

关键词: UV-C辐射, 光合作用, 豌豆, 抗氧化酶

Abstract: Effects of duration of UV-C radiation on photosynthetic characteristics and activity of antioxidant enzyme in pea seedlings were studied.Results show that Enhanced UV-C radiation significantly decreased photosynthesis rate(Pn),stomatal conductance(Gs),intercellular CO2 concentration(Ci),transpiration rate(Etr)and carboxylation efficiency(CE).Prolonged duration of UV-C radiation increased the activities of POD and CAT,which soon declined,and kept the activity of SOD,and the content of chlorophyll gradually going down,but the content of MDA going up.The results suggest that enhanced UV-C radiation decreased activities of the antioxidant enzymes and made membrane peroxidated,thus leading to weakened photosynthesis.

Key words: UV-C radiation, photosynthesis, pea, antioxidant enzyme

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