生物技术通报 ›› 2013, Vol. 0 ›› Issue (2): 93-99.

• 研究报告 • 上一篇    下一篇

甘蔗脱落酸胁迫成熟诱导蛋白基因(SoASR)的克隆和表达分析

黄杏1,2 杨丽涛1,2 张保青1 宋修鹏1 李杨瑞1,2 王盛1   

  1. (1. 广西大学农学院 亚热带农业生物资源保护与利用国家重点实验室,南宁 530005; 2. 中国农业科学院甘蔗研究中心 农业部广西甘蔗生物技术与遗传改良重点实验室 广西作物遗传改良生物技术重点实验室 广西甘蔗遗传改良重点实验室,南宁 530007)
  • 收稿日期:2012-08-17 修回日期:2013-02-27 出版日期:2013-02-26 发布日期:2013-02-27
  • 作者简介:黄杏,女,博士研究生, 研究方向:甘蔗栽培及相关生理基础; E-mail: shmilyx023@163.com杨丽涛,教授,研究方向:甘蔗生理生化和分子生物学; E-mail: liyr@gxu.edu.cn;
  • 基金资助:
    科技部国际合作项目(2009DFA30820), 广西自然科学基金创新团队项目(2011GXNSFF018002), 广西科学研究与技术开发计划项目(桂科产1123008-1), 广西农科院团队项目(桂农科2011YT01)

Molecular Cloning of Sugarcane ASR Gene(SoASR)and Its Expression Analysis

Huang Xing1,2 Yang Litao1,2 Zhang Baoqing1 Song Xiupeng1 Li Yangrui1,2 Wang Sheng1   

  1. (1. State Key Laboratory of Conservation and Utilization of Subtropical Agro-bioresources,Agricultural College,Guangxi University,Nanning 530005 ;2. Sugarcane Research Center,Chinese Academy of Agricultural Sciences,Key Laboratory of Sugarcane Biotechnology and Genetic Improvement(Guangxi),Ministry of Agriculture,Guangxi Crop Genetic Improvement and Biotechnology Laboratory,Guangxi
  • Received:2012-08-17 Revised:2013-02-27 Published:2013-02-26 Online:2013-02-27

摘要: 采用同源克隆和RT-PCR 技术克隆了甘蔗SoASR 基因全长cDNA,GenBank 登录号为JX470187,长度为753 bp,包括一个429 bp 的开放阅读框,编码142 个氨基酸的蛋白。同源性分析表明,甘蔗SoASR 与大蕉、玉米和高粱聚为一小组,同源性分别为79%、93% 和88%。将SoASR 在大肠杆菌中表达,获得一个约32.0 kD 的外源蛋白。实时荧光定量PCR 分析结果表明,低温胁迫下该基因在抗寒性强的甘蔗品种桂糖28 号(GT28)中表达量先升后降,在抗寒性弱的甘蔗品种园林6 号(YL6)中则呈下降趋势;该基因的表达在两个甘蔗品种中均受ABA 的诱导。这说明SoASR 基因在甘蔗抗寒机制中发挥一定作用。

关键词: 甘蔗, 脱落酸胁迫成熟诱导蛋白, 克隆, 表达

Abstract: In this study, the full length of SoASR cDNA obtained by homologous cloning and RT-PCR. It consists of 753 bp with an open reading frame of 429 bp, encoding a polypeptide of 142 amino acids, and its GenBank accession number is JX470187. Homology analysis showed that SoASR were clustered into a group with barley, maize and sorghum with homology of 79%, 93% and 88%, respectively. A 32.0 kD heterologous protein was obtained when SoASR gene was expressed in E. coli. The results of quantitative real-time PCR analysis showed that, the mRNA of ASR was first up-regulated and then down-regulated in the sugarcane variety with strong cold resistance, GT28, and down-regulated in the sugarcane variety with weak cold resistance, YL6, under low temperature stress. The expressions of SoASR gene were induced in two varieties. These results suggested that SoASR might be involved in response to cold stress in sugarcane.

Key words: Sugarcane, ABA-/stress-/ripening-induced protein(ASR), Clone Expression