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园艺学报 ›› 2012, Vol. 39 ›› Issue (4): 769-776.

• 研究报告 • 上一篇    下一篇

蝴蝶兰抗坏血酸过氧化物酶基因克隆及其表达研究

许传俊 1,2,孙叙卓2,李 玲2,*,茹志伟2,曾碧玉1,刘育梅3,黄珺梅   

  1. (1 福建省亚热带植物研究所,福建省亚热带植物生理生化重点实验室,福建厦门 361006;2 华南师范大学生命科学学院,广东省植物发育生物工程重点实验室,广州 510631;3 厦门华侨亚热带植物引种园,福建厦门 361002)
  • 出版日期:2012-04-25 发布日期:2012-04-25

Molecular Clonging and Expression Analysis of Homological Gene APX from Phalaenopsis

XU Chuan-jun1,2,SUN Xu-zhuo2,LI Ling2,*,RU Zhi-wei2,ZENG Bi-yu1,LIU Yu-mei3,and HUANG Jun-mei1   

  1. (1 Fujian Key Laboratory of Physiology and Biochemistry for Subtropical Plant,Fujian Institute of Subtropical Botany,Xiamen,Fujian 316006,China;2 Guangdong Key Lab of Biotechnology for Plant Development,College of Life Science,South China Normal University,Guangzhou 510631,China;3Xiamen Overseas Chinese Subtropical Plant IntroductionGarden,Xiamen,Fujian 361002,China)
  • Online:2012-04-25 Published:2012-04-25

摘要: 从蝴蝶兰(Phalaenopsis)中克隆获得了抗坏血酸过氧化物酶基因(APX)同源序列,命名为PhAPX(GenBank登录号为:FJ161977)。PhAPX cDNA全长为1 320 bp,完整的编码框为747 bp,编码249个氨基酸。生物信息学分析结果表明,PhAPX属于过氧化物酶家族ClassⅠ的成员,PhAPX蛋白可能是胞质型APX,与其他植物的APX相似性较高。real-time PCR分析表明PhAPX是一个广谱表达的基因,在蝴蝶兰根、茎、叶、花等各个部位都有表达。机械伤害和盐处理都可以诱导PhAPX表达上调,表明PhAPX在胁迫防御中起作用。

关键词: 蝴蝶兰, APX, 克隆, 表达, real-time PCR

Abstract: The APX homolog sequence,PhAPX(GenBank accession No. FJ161977)was cloned from Phalaenopsis plant. The full length cDNA of PhAPX was 1 320 bp,has an open read frame of 747 bp,encoding a protein of 249 amino acids. Bioinformatic analysis showed that PhAPX protein shared the characters of ClassⅠof peroxidase family. Amino acids sequence analysis suggested that PhAPX protein might locate in cytoplast and PhAPX was highly similar to other APX proteins. Real-time PCR analysis showed that PhAPX mRNA,a broad-spectrum expression gene,was expressed in the organs in Phalaenopsis including root,stem,leaf and flower. PhAPX was also found to be up-regulated by wound and NaCl,which suggested that it might play a role on stress.

Key words: Phalaenopsis, APX, clone, expression, real-time PCR

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