| Effects of calcium and calmodulin antagonist W7 on antioxidant systems of roots of tomato seedlings under drought stress |
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| DOI：10.7606/j.issn.1000-7601.2009.04.21 |
| Key Words: calmodulin antagonist W7 PEG stress tomato antioxidatant system |
| Author Name | Affiliation | | ZHANG Chunmei | College of Horticulture, Northwest A & F University, Yangling, Shanxi 712100, China；
Department of Agricutural Sciences, Hexi University, Zhangye, Gansu 734000, China | | ZOU Zhirong | College of Horticulture, Northwest A & F University, Yangling, Shanxi 712100, China | | HUANG Zhi | College of Horticulture, Northwest A & F University, Yangling, Shanxi 712100, China | | ZHANG Zhixin | College of Horticulture, Northwest A & F University, Yangling, Shanxi 712100, China |
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| Abstract: |
| The effect of Ca2+ 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 in hydroponics culture. The results showed that pretreated seedlings with calmodul in antagonist W7 under PEG stress had lower SOD and POD activities, and higher production rate of O2·, MDA and H2O2, in addition, aggravated the damage of AsA and GSH; On the contrary, Ca2+ treatment enabled the seedlings to keep relatively high activities of SOD and POD, lower production rate of O2-· and MDA content, at the same time, alleviated the accumulation of AsA and GSH. These results indicated that Ca2+-CaM signal transduction might regulate resistance of tomato seedlings to PEG stress of tomato seedlings by affecting the activity of some antioxidant enzymes and the content of antioxidant substance. The experiment shows that Ca2+-CaM signal system plays an important regulating role in alleviating PEG stress induced by 10% polyethylene glycol (PEG-6000) in seedlings. |
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