A maize stress-responsive NAC transcription factor, ZmSNAC1, confers enhanced tolerance to dehydration in transgenic Arabidopsis

文献类型： 外文期刊

第一作者： Lu, Min

作者： Lu, Min;Ying, Sheng;Zhang, Deng-Feng;Shi, Yun-Su;Song, Yan-Chun;Wang, Tian-Yu;Li, Yu

作者机构：

关键词： Abiotic stress;Maize;NAC;Stress tolerance;Transgenic plant

期刊名称：PLANT CELL REPORTS （ 影响因子：4.57； 五年影响因子：4.463 ）

ISSN： 0721-7714

年卷期： 2012 年 31 卷 9 期

页码：

收录情况： SCI

摘要： NAC proteins are plant-specific transcription factors that play essential roles in stress responses. However, only little information regarding stress-related NAC genes is available in maize. In this study, a maize NAC gene, ZmSNAC1, was cloned and functionally characterized. Expression analysis revealed that ZmSNAC1 was strongly induced by low temperature, high-salinity, drought stress, and abscisic acid (ABA) treatment, but downregulated by salicylic acid treatment. Subcellular localization experiments in Arabidopsis protoplast cells indicated that ZmSNAC1 was localized in the nucleus. Transactivation assays demonstrated that ZmSNAC1 functioned as a transcriptional activator. Overexpression of ZmSNAC1 in Arabidopsis led to hypersensitivity to ABA and osmotic stress at the germination stage, but enhanced tolerance to dehydration compared to wild-type seedlings. These results suggest that ZmSNAC1 functions as a stress-responsive transcription factor in positive modulation of abiotic stress tolerance, and may have applications in the engineering of drought-tolerant crops. Key message ZmSNAC1 functioned as a stress-responsive transcription factor in response to abiotic stresses, and might be useful for crop tolerance improvement.

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