芹菜韧皮部蛋白基因的分离与表达分析
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教育部新世纪优秀人才支持计划(NECT-11-0670),江苏高校优势学科建设项目(2011PAPD),江苏省双创计划(2011JSSC),南京农业大学高层次人才引进项目资助(130804075)。


Isolation of phloem protein gene and expression analysis in celery
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    摘要:

    韧皮部蛋白在维持植物形态,物质转运以及植物伤口保护等方面起着重要作用。本研究以地域来源和性状特性差异均较大的两个芹菜品种‘六合黄心芹’和‘美国西芹’为试验材料,利用RT-PCR技术获得这两种芹菜韧皮部蛋白基因的cDNA序列。结果显示:这两种芹菜来源的韧皮部蛋白基因全长均为546 bp,编码181个氨基酸。两者核苷酸序列有3个位点的不同,分别为:88G/A、399T/C和489T/C;在氨基酸序列上有一个位点的不同,为30T/A。预测其蛋白质分子量为19 kD,pI值为9.18。‘六合黄心芹’和‘美国西芹’的韧皮部蛋白与忽地笑等植物的韧皮部蛋白相似度较高,在保守位置分别具有5个亮氨酸残基和4个色氨酸残基。实时定量PCR表达分析表明,该基因主要在芹菜的茎和根等部位表达,具有明显的组织特异性。

    Abstract:

    The phloem proteins play important role in the maintenance of morphology, material transportation and wound protection in higher plant. Here, cDNA sequences of phloem protein were obtained using RT-PCR technology from two celery varieties ‘Liu He Huang Xin Qin’ and ‘Mei Guo Xi Qin’. The full-length of the two phloem-protein genes were 546 bp, and encoded 181 amino acid residues, respectively. The nucleotide sequences alignment showed that there were 3 loci differences: 88G/A, 399T/C and 489T/C. The deduced amino acid sequences showed that there was 1 residue difference, 30T/A. Prediction of the proteins molecular weight were 19 kDa, and pI were 9.18, respectively. The phloem-proteins from ‘Liu He Huang Xin Qin’ and ‘Mei Guo Xi Qin’ have highly identity with Lycoris aurea. There were 5 leucine and 4 tryptophan amino acid residues in the conservative position, respectively. Real time RT-PCR analysis showed that the genes expression were tissue specificity, which mainly expressed in the stem and root.

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熊爱生,马静,王枫,等.芹菜韧皮部蛋白基因的分离与表达分析[J].植物遗传资源学报,2013,14(3):523-529.

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  • 收稿日期:2012-06-21
  • 最后修改日期:2012-08-01
  • 录用日期:2012-11-29
  • 在线发布日期: 2013-04-24
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