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Exogenous nitric oxide protects against salt-induced oxidative stress in the leaves from two genotypes of tomato (Lycopersicom esculentum Mill.)

文献类型： 外文期刊

作者： Wu, Xuexia 1 ; Zhu, Weimin 1 ; Zhang, Hui 1 ; Ding, Haidong 1 ; Zhang, Hong Juan 3 ;

作者机构： 1.Shanghai Acad Agr Sci, Inst Hort Res, Shanghai 201106, Peoples R China

2.Shanghai Key Lab Protected Hort Technol, Shanghai 201106, Peoples R China

3.Yangzhou Univ, Coll Biosci & Biotechnol, Yangzhou 225009, Peoples R China

关键词： catalase: 9001-05-2;EC 1.11.1.6;ascorbate: 299-36-5;nitric oxide: 10102-43-9;malondialdehyde: 542-78-9;reduced glutathione: 70-18-8;proline: 609-36-9;sodium nitroprusside: 14402-89-2;antioxidant enzyme;superoxide dismutase: 9054-89-1;EC 1.15.1.1;ascorbate peroxidase: 72906-87-7;EC 1.11.1.11;soluble sugar;guaiacol peroxidase: 9003-99-0;EC 1.11.1.7;genotype;salt-induced oxidative stress

期刊名称：ACTA PHYSIOLOGIAE PLANTARUM （ 影响因子：2.354； 五年影响因子：2.711 ）

ISSN：

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收录情况： SCI

摘要： Nitric oxide (NO) has emerged as a key molecule involved in many physiological events in plants. To characterize roles of NO in tolerance of tomato (Lycopersicom esculentum Mill.) to salt stress, the protective effects of NO against salt-induced oxidative stress in the leaves of tomato cultivar Hufan1480 (salt-tolerant) and Hufan2496 (salt-sensitive) were evaluated. Under salt stress, Hufan1480 showed higher biomass accumulation, and less oxidative damage when compared with the Hufan2496. Application of exogenous sodium nitroprusside, a NO donor, dramatically alleviated growth suppression induced by salt stress in two tomato ecotypes, reflected by decreased malondialdehyde and O (2) (center dot-) production. Furthermore, the antioxidant enzymes superoxide dismutase, guaiacol peroxidase, catalase and ascorbate peroxidase, the antioxidant metabolites ascorbate and reduced glutathione, and the osmosis molecules proline and soluble sugar were increased in both ecotypes in the presence of NO under salt stress. Therefore, the protective effect of NO against salt-induced oxidative damages in tomato seedlings is most likely mediated through stimulation of antioxidant system.

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