Expression of SbSNAC1, a NAC transcription factor from sorghum, confers drought tolerance to transgenic Arabidopsis

文献类型： 外文期刊

第一作者： Lu, Min

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

作者机构：

关键词： Abiotic stress;NAC transcription factor;Stress tolerance;Transgenic plants

期刊名称：PLANT CELL TISSUE AND ORGAN CULTURE （ 影响因子：2.711； 五年影响因子：2.73 ）

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年卷期：

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收录情况： SCI

摘要： SbSNAC1 is a member of the plant-specific NAC transcription factor superfamily that plays an important role in the abiotic stress response in sorghum. The SbSNAC1 protein consists of a typical NAC conserved domain at its N terminus and a diverse C-terminal region. The expression of SbSNAC1 was induced by various abiotic stresses, such as drought and salinity. SbSNAC1 is also expressed at a relatively higher concentration in roots and responds to the phytohormone abscisic acid. Transactivation analysis indicated that the transactivation activity of SbSNAC1 is located in the C-terminal region, whereas no activity was detected in the conserved NAC-domain, localized in the N-terminus. Subcellular localization assays using constructs of different SbSNAC1 fragments fused with green fluorescent protein revealed that the SbSNAC1 protein localized in the nucleus, and that the nuclear localization signal was present in the N-terminal section. Furthermore, transgenic plants overexpressing SbSNAC1 had an improved drought stress tolerance compared with wild-type plants, but no obvious retardation was detected in plant growth and development. These results suggest that SbSNAC1 has the potential to improve abiotic stress tolerance.

分类号： Q942

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