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Relationship of metabolism of reactive oxygen species with cytoplasmic male sterility in pepper (Capsicum annuum L.)

文献类型： 外文期刊

作者： Deng, Ming-Hua 2 ; Wen, Jin-Fen 4 ; Huo, Jin-Long 5 ; Zhu, Hai-Shan 2 ; Dai, Xiong-Ze 1 ; Zhang, Zhu-Qing 1 ; Zhou, Hu 1 ;

作者机构： 1.Hunan Acad Agr Sci, Inst Vegetable Crops, Changsha 410125, Hunan, Peoples R China

2.Yunnan Agr Univ, Coll Hort & Landscape, Kunming 650201, Peoples R China

3.Cent S Univ, Branch Longping, Changsha 410125, Hunan, Peoples R China

4.Kunming Univ Sci & Technol, Fac Modern Agr Engn, Kunming 650224, Peoples R China

5.Yunnan Agr Univ, Fac Anim Sci & Technol, Kunming 650201, Peoples R China

关键词： Pepper;Mitochondrion;Cytoplasmic male sterility;Reactive oxygen species;Antioxidant enzyme

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

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收录情况： SCI

摘要： Pepper cytoplasmic male sterility (CMS) line 9704A is one of the CMS types used for hybrid pepper (Capsicum annuum L) production in China. Our previous studies suggested that CMS-9704A may suffer from oxidative stress as its cyanide-resistant respiration is lower than that of the maintainer line. To elucidate the metabolic mechanism of reactive oxygen species (ROS) in the CMS-pepper anthers, the metabolism changes in the production and scavenging of ROS and gene expression related to ROS-scavenging enzymes were investigated in the anther mitochondria of CMS-9704A and maintainer-9704B. At the abortion stage (pollen mother cell meiosis stage), anthers of CMS-9704A had higher contents of O2(center dot-), H2O2 and MDA than those of the maintainer. Simultaneously, there were higher activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) in scavenging ROS in the anthers of the CMS line than in the maintainer. Abundance of POD, Mn-SOD, CAT1, CAT2 and CAT3 mRNA in anthers of CMS-9704A corresponded with the activities of these three genes, except for that of Cu/Zn-SOD and lrion-SOD. Therefore, it is possible that the sterility in CMS-9704A is related to the abortion of microspores, induced by chronic oxidative stress caused by an abnormal increase in ROS, and also by membrane lipid peroxidation in the mitochondria in the early stage of pollen development. (C) 2011 Elsevier B.V. All rights reserved.

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