干旱地区农业研究2009，Vol.27Issue(4)：111-115,135,6.
PEG胁迫下Ca 2+和钙调素拮抗剂W7对不同品种番茄幼苗抗氧化系统的影响
Effects of calcium and calmodulin antagonist W7 on antioxidant systems of roots of tomato seedlings under drought stress
摘要
Abstract
The effect of Ca 2+ and calmodulin antagonist W7 on antioxidant systems of tomato (Lycopersicon esculentum M.) seedlings under drought stress induced by 10% polyethylene glycol (PEG-6000) was studied i n hydroponics culture. The results showed that pretreated seedlings with calmodul in antagonist W7 under PEG stress had lower SOD and POD activities, and higher p roduction rate of O2 ()/(*), MDA and H2O2, in addition, ag gravated the dam age of AsA and GSH; On the contrary, Ca 2+ treatment enabled the seedli ngs to keep relatively high activities of SOD and POD, lower production rate of O 2-* and MDA content, at the same time, alleviated the accumulation of AsA a nd GSH. These results indicated that Ca 2+-CaM signal transduction might re gulate resistance of tomato seedlings to PEG stress of tomato seedlings by affec ting the activity of some antioxidant enzymes and the content of antioxidant sub stance. The experiment shows that Ca 2+-CaM signal system plays an importan t regulating role in alleviating PEG stress induced by 10% polyethylene glycol ( PEG-6000) in seedlings.关键词
钙调素拮抗剂W7/干旱胁迫/番茄/抗氧化系统Key words
calmodulin antagonist W7/PEG stress/tomato/antioxi datant system分类
农业科技引用本文复制引用
张春梅,邹志荣,黄志,张志新..PEG胁迫下Ca 2+和钙调素拮抗剂W7对不同品种番茄幼苗抗氧化系统的影响[J].干旱地区农业研究,2009,27(4):111-115,135,6.基金项目
国家"十一五"攻关项目(2007BAD79B04) （2007BAD79B04）
