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应用生态学报 ›› 1995, Vol. 6 ›› Issue (1): 87-91.

• 研究论文 • 上一篇    下一篇

农作物对Cd毒害的耐性机理探讨

杨居荣, 贺建群, 张国祥, 毛显强   

  1. 北京师范大学环境科学研究所, 北京 100875
  • 收稿日期:1994-04-29 修回日期:1994-07-07 出版日期:1995-01-25 发布日期:1995-01-25
  • 基金资助:

    国家自然科学基金

Tolerance mechanism of crops to Cd pollution

Yang Jurong, He Jianqun, Zhang Guoxiang, Mao Xianqiang   

  1. Baing Normal University, Beijing 100875
  • Received:1994-04-29 Revised:1994-07-07 Online:1995-01-25 Published:1995-01-25

摘要: 对生长在Cd污染条件下的8种作物体内Cd的存在形态分析表明,作物的耐Cd性与Cd的形态分布密切相关,在耐性作物体内,蛋白质(多肽)结合Cd量的比例低于非耐性作物;有机酸盐和一代磷酸盐态Cd的比例增加;分离得到Cd诱导蛋白,其中束缚了一定量的Cd,限制了Cd以自由态存在。耐性较低的作物体内,大分子量的蛋白质中富Cd量较高。

关键词: 耐性机理, 农作物, Cd, 黄瓜, 干旱, 不定根, 钙离子, 一氧化氮, 抗氧化酶

Abstract: Studies on Cd forms in8 kinds of crops under Cd pollution show that the Cd tolerance ofcrops is closely related to the distribution of Cd forms.In Cd-tolerant crops, the percentage of Cd combined with protein (polypeptide) is higher, organic Cd and Cd hydrophos-phare are more, and Cd-induced protein contains definite amounts of bound Cd which limits the existence of free Cd.In crops with lower Cd tolerance, big molecular protein isrich in Cd.

Key words: Tolerance mechanism, Cd, Crops, cucumber, drought, adventitious root, calcium ion, nitric oxide, antioxidant enzymes