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Overexpression of an Oil Radish Superoxide Dismutase Gene in Broccoli Confers Resistance to Downy Mildew

文献类型： 外文期刊

作者： Jiang, Ming 1 ; Miao, Li-xiang 2 ; He, Caiming 1 ;

作者机构： 1.Taizhou Univ, Coll Life Sci, Linhai 317000, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Hort, Hangzhou 310021, Zhejiang, Peoples R China

关键词： Superoxide dismutase;Overexpression;Brassica oleracea var. italica;Raphanus sativus var. raphanistroides;Downy mildew

期刊名称：PLANT MOLECULAR BIOLOGY REPORTER （ 影响因子：1.595； 五年影响因子：2.042 ）

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收录情况： SCI

摘要： Superoxide dismutases (SOD) play important roles in plant disease resistance. In this study, a manganese superoxide dismutase gene, designated RsrSOD, was isolated from oil radish (Raphanus sativus var. raphanistroides). RsrSOD was 696 bp in length predicted to encode 231 amino acids. The deduced amino acid sequence contained four putative Mn-binding sites. Under the control of the CaMV35S promoter, RsrSOD was introduced into broccoli (Brassica oleracea var. italica) via Agrobacterium tumefaciens-mediated transformation. Six transgenic lines were obtained out of 35 independent shoots. Both gene expression and enzyme activity of SOD increased significantly in transgenic lines when challenged with Hyaloperonospora parasitica. Three lines, L19, L23, and L25, exhibited the highest resistance against downy mildew with disease symptoms restricted completely. These highly resistant lines would serve as good broccoli breeding materials.

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[1]Overexpression of a Broccoli Defensin Gene BoDFN Enhances Downy Mildew Resistance. Jiang Ming,He Cai-ming,Miao Li-xiang,Zhang Yu-chao. 2012

[2]Over-expression of a C3H-type zinc finger gene contributes to salt stress tolerance in transgenic broccoli plants. Jiang, Ming,He, Cai-Ming,Jiang, Jing-Jing,Miao, Li-Xiang.

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