Isolation and characterization of a gene from Medicago sativa L., encoding a bZIP transcription factor

文献类型： 外文期刊

第一作者： Yang, Qingchuan

作者： Yang, Qingchuan;Kang, Junmei;Zhang, Tiejun;Sun, Yan;Fang, Feng

作者机构：

关键词： Medicago Sativa L;Gene cloning;Subcellular localization;Real time fluorescent quantitative PCR analysis;Transgenic tobacco analysis

期刊名称：MOLECULAR BIOLOGY REPORTS （ 影响因子：2.316； 五年影响因子：2.357 ）

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页码：

收录情况： SCI

摘要： A full-length cDNA of 1,537 nucleotides was cloned from Medicago sativa L. cv. “Zhongmu No. 1” by rapid amplification of cDNA ends. It was designated as MsZIP, encoding a protein of 340 amino acids. The protein molecular weight was 36.43 kDa, and the theoretical isoelectric point was 5.72. The MsZIP preferentially localized in nucleus and have signal peptide. Blast analysis revealed that MsZIP shared the highest homology with some bZIP proteins of M. truncatula. The transcript of MsZIP was stronglyenriched in leaf compared with root and stem of mature alfalfa plants. MsZIP was strongly induced by 15 % PEG6000 (polyethylene glycol), 50 μM abscisic acid, 200 mM NaCl, 70 μM gibberellic acid, 5 mM salicylic acid and 200 μM methyl jasmonate. Physiological resistance parameters were measured in the transgenic tobacco. Malondialdehyde content, relative water content, soluble sugar content, soluble protein content and proline content in transgenic tobacco increased compared with non-transgenic tobacco under salt stress or drought stress. The results showed that accumulation of the MsZIP protein in the vegetative tissues of transgenic plants enhanced their tolerance to osmotic pressure stress. These results demonstrate a role for the MsZIP protein instress protection and suggest the potential of the MsZIP gene for genetic engineering of salt tolerance and drought tolerance.

分类号： Q7

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