Overexpression of a tomato flavanone 3-hydroxylase-like protein gene improves chilling tolerance in tobacco

文献类型： 外文期刊

第一作者： Zhang, Song

作者： Zhang, Song;Wang, Guo-Dong;Kong, Fan-Ying;Meng, Chen;Deng, Yong-Sheng

作者机构：

关键词： Chilling stress; Flavonoids; Flavanone 3-hydroxylase-like protein; Reactive oxygen species; Tomato; Transgenic tobacco

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）

ISSN： 0981-9428

年卷期： 2015 年 96 卷

页码：

收录情况： SCI

摘要： Flavonoids are secondary metabolites found in plants with a wide range of biological functions, such as stress protection. This study investigated the functions of a tomato (Solanum lycopersicum) flavanone 3-hydroxylase-like protein gene SlF3HL by using transgenic tobacco. The expression of the gene was up-regulated under chilling (4 degrees C), heat (42 degrees C), salt (NaCl) and oxidative (H2O2) stresses. The transgenic plants that displayed high SIF3HL mRNA and protein levels showed higher flavonoid content than the WT plants. Moreover, the expression of three flavonoid biosynthesis-related structural genes, namely, chalcone synthase (CHS), chalcone isomerase (CHI) and flavonol synthase (FLS) was also higher in the transgenic plants than in the WT plants. Under chilling stress, the transgenic plants showed not only faster seed germination, better survival and growth, but also lower malondialdehyde (MDA) accumulation, relative electrical conductivity (REC) and H2O2 and O-2(center dot-) levels compared with WT plants. These results suggested that SlF3HL stimulated flavonoid biosynthesis in response to chilling stress. (C) 2015 Elsevier Masson SAS. All rights reserved.

分类号： Q945`Q946

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