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Characterization and expression profile of CaNAC2 pepper gene

文献类型： 外文期刊

作者： Guo, Wei-Li 1 ; Wang, Shu-Bin 3 ; Chen, Ru-Gang 1 ; Chen, Bi-Hua 2 ; Du, Xiao-Hua 2 ; Yin, Yan-Xu 1 ; Gong, Zhen-Hui 1 ;

作者机构： 1.Northwest A&F Univ, Coll Hort, Yangling 712100, Shaanxi, Peoples R China

2.Henan Inst Sci & Technol, Sch Hort Landscape Architecture, Xinxiang, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Vegetable Crops, Nanjing, Jiangsu, Peoples R China

关键词： Capsicum annuum L.;CaNAC2;expression profile;abiotic stress;virus-induced gene silencing

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2015 年 6 卷

页码：

收录情况： SCI

摘要： The plant-specific NAG (NAM, ATAF, and CUC) transcription factors have diverse role in development and stress regulation. A new transcript encoding NAG protein, homologous to nam-like protein 4 from Petunia was identified from an ABA-regulated subtractive cDNA library of Capsicum annuum seedling. Here, this homolog (named CaNAC2) from C. annuum was characterized and investigated its role in abiotic stress tolerance. Our results indicated that a plant-specific and conserved NAG domain was located in the N-terminus domain of CaNAC2 which was predicted to encode a polypeptide of 410 amino acids. Phylogenetic analysis showed that CaNAC2 belonged to the NAC2 subgroup of the orthologous group 4d. The protein CaNAC2 was subcellularly localized in the nucleus and it had transcriptional activity in yeast cell. CaNAC2 was expressed mainly in seed and root. The transcription expression of CaNAC2 was strongly induced by cold, salt and ABA treatment and inhibited by osmotic stress and SA treatment. Silence of CaNAC2 in virus-induced gene silenced pepper seedlings resulted in the increased susceptibility to cold stress and delayed the salt-induced leaf chlorophyll degradation. These results indicated that this novel CaNAC2 gene might be involved in pepper response to abiotic stress tolerance.

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