玉米逆境胁迫响应基因ZmbZIP71的克隆与表达分析
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国家重点基础研究发展计划(973计划)项目(2011CB100100);国家自然科学基金重点项目(30730063)


Isolation and Expression Analysis of a Stress-responsive Gene “ZmbZIP71” in Maize (Zea mays L.)
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    摘要:

    从玉米抗旱自交系CN165中克隆得到了与逆境胁迫相关的bZIP(Basic Leucine Zipper Protein)基因ZmbZIP71。ZmbZIP71基因的开放阅读框为471 bp,编码156个氨基酸,相对分子量为17.59 kDa,等电点pI为9.24。ZmbZIP71蛋白包含真核生物中高度保守的bZIP结构域。ZmbZIP71基因编码区的基因组序列全长为1050 bp,包括2个外显子和1个内含子。利用实时荧光定量PCR方法分析ZmbZIP71基因在玉米不同组织中的表达差异及其在非生物胁迫下的表达模式,结果表明,该基因在雄穗和雌穗中的表达量较高,并且受干旱、低温和ABA的胁迫诱导上调表达,在盐胁迫下下调表达。

    Abstract:

    A number of basic leucine zipper (bZIP) transcription factors are known to function in stress signaling in plants but few have thus far been functionally characterized in maize. A bZIP transcription factor gene, ZmbZIP71, was isolated from maize inbred line CN165. Sequence analysis showed that ZmbZIP71 encoded a polypeptide of 156 amino acids with predicted molecular mass of 17.59 kDa and pI of 9.24. The genomic DNA of ZmbZIP71 was composed of two exons. The results of real-time PCR analysis indicated that ZmbZIP71 was up-regulated by drought, cold (4℃) and ABA, and down-regulated by NaCl treatment in seedlings, suggesting that ZmbZIP71 might function as an early stress-responsive gene. The tissue-specific expression analysis suggested that ZmbZIP71 was constitutively expressed in maize different tissues and expressed much higher in tassels and female ear than in other organs.

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刘彦丹,王天宇.玉米逆境胁迫响应基因ZmbZIP71的克隆与表达分析[J].植物遗传资源学报,2011,12(5):775-781.

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  • 收稿日期:2011-02-13
  • 最后修改日期:2011-02-13
  • 录用日期:2011-06-09
  • 在线发布日期: 2011-08-15
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