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Modulation of zinc-induced oxidative damage in Solanum melongena by 6-benzylaminopurine involves ascorbate-glutathione cycle metabolism

文献类型： 外文期刊

作者： Wu, Xuexia 1 ; He, Jie 3 ; Ding, Haidong 3 ; Zhu, Zongwen 1 ; Chen, Jianlin 4 ; Xu, Shuang 2 ; Zha, Dingshi 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Inst Hort Res, Shanghai 201403, Peoples R China

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

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

4.Shanghai Acad Agr Sci, Agr Informat Inst Sci & Technol, Shanghai, Peoples R China

关键词： Ascorbate-glutathione cycle;6-Benzylaminopurine;Cytokinin;Oxidative damage;Solanum melongena;Zinc stress

期刊名称：ENVIRONMENTAL AND EXPERIMENTAL BOTANY （ 影响因子：5.545； 五年影响因子：5.99 ）

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收录情况： SCI

摘要： Cytokinins (CKs) play an important role in plant adaptation to environmental stresses. Ascorbate-glutathione (AsA-GSH) cycle is regarded as an essential mechanism for resistance of plants under stress conditions. In this study, the effects of 6-benzylaminopurine (BAP), a synthetic CK, on the growth, oxidative damage, AsA-GSH cycle metabolism, and hormone contents in the leaves of eggplant (Solanum melongena L.) seedlings were investigated under 10 mM zinc (Zn) stress. Zn stress resulted in oxidative damage as evidenced by a decrease in eggplant growth and an increase in reactive oxygen species (ROS, H2O2, and O-2(center dot-)) formation and membrane damage (lipid peroxidation and electrolyte leakage). However, application of exogenous BAP significantly alleviated the growth inhibition and oxidative damage caused by Zn stress. Importantly, BAP further enhanced the redox states of AsA and GSH, and the related enzyme activities involved in the AsA-GSH cycle such as ascorbate peroxidase (APX), glutathione reductase (GR), dehydroascorbate reductase (DHAR), monodehydroascorbate reductase (MDHAR), and glutathione synthetase (GS) in eggplants grown under Zn stress. Quantitative analysis revealed that BAP could induce the transcript levels of MDHAR and GS, but not DHAR in AsA-GSH cycle under Zn stress or non-stress conditions. GR expression was further increased by BAP application in the leaves of eggplants under Zn stress. Moreover, BAP shifted the hormonal balance toward a substantial increase in the levels of CK and auxin (IAA) but a decrease in abscisic acid (ABA) content in the leaves with or without Zn treatment. The results of the present study strongly suggest that BAP-enhanced resistance of eggplants against Zn toxicity is associated with the regulation of AsA-GSH cycle metabolism as an effective antioxidant system and the balance of hormones. (C) 2015 Elsevier B.V. All rights reserved.

  • 相关文献

[1]Exogenous 24-epibrassinolide alleviates zinc-induced toxicity in eggplant (Solanum melongena L.) seedlings by regulating the glutathione-ascorbate-dependent detoxification pathway. Wu, X. X.,Xu, S.,Zhu, Z. W.,Zha, D. S.,Chen, J. L..

[2]Melatonin alleviates cold-induced oxidative damage by regulation of ascorbate-glutathione and proline metabolism in melon seedlings (Cucumis melo L.). Zhang, Y. P.,Chen, Y. Y.,Zhang, Y. P.,Xu, S.,Yang, S. J.,Chen, Y. Y..

[3]Exogenous 6-benzylaminopurine confers tolerance to low temperature by amelioration of oxidative damage in eggplant (Solanum melongena L.) seedlings. Chen, Jianlin,Wu, Xuexia,Zhu, Zongwen,Xu, Shuang,Zha, Dingshi,Wu, Xuexia,Zhu, Zongwen,Xu, Shuang,Zha, Dingshi,Yao, Xinfeng. 2016

[4]Grafting Eggplant onto Tomato Rootstock to Suppress Verticillium dahliae Infection: The Effect of Root Exudates. Liu, Na,Zhou, Baoli,Li, Yixiu,Hao, Jing,Zhao, Xin,Lu, Bo. 2009

[5]Protection of photosynthesis and antioxidative system by 24-epibrassinolide in Solanum melongena under cold stress. Wu, X. X.,Zha, D. S.,Wu, X. X.,Zhu, Z. W.,Yang, S. J.,Zha, D. S.,He, J.. 2014

[6]Effects of grafting on root exudates of eggplant and allelopathy of benzyl benzoate on seedling growth. Liu, N.,Zhou, B. L.,Lu, B.,Zhu, W. M..

[7]Amelioration of salt-induced oxidative stress in eggplant by application of 24-epibrassinolide. Ding, H-D,Zhu, Z-W,Yang, S-J,Zha, D-S,Wu, X-X,Ding, H-D,Zhu, X-H,Wu, X-X.

[8]Effects of cytokinin on photosynthetic gas exchange, chlorophyll fluorescence parameters and antioxidative system in seedlings of eggplant (Solanum melongena L.) under salinity stress. Wu, Xuexia,Zhu, Zongwen,Li, Xian,Zha, Dingshi. 2012

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