生物技术通报 ›› 2015, Vol. 31 ›› Issue (5): 100-105.doi: 10.13560/j.cnki.biotech.bull.1985.2015.05.016

• 研究报告 • 上一篇    下一篇

沙冬青AmHsa32基因超表达提高转基因烟草抗热性

贺茜, 王艳萍, 陈玉珍, 卢存福   

  1. (北京林业大学生物科学与技术学院 林木育种国家工程实验室,北京 100083)
  • 收稿日期:2014-11-09 出版日期:2015-05-18 发布日期:2015-05-18
  • 作者简介:贺茜,男,硕士,研究方向:植物分子生物学;E-mail:tree.hq@163.com
  • 基金资助:
    国家自然科学基金项目(31270737),高等学校学科创新引智计划资助项目(B13007),长江学者和创新团队发展计划资助项目(IRT13047),北京市自然科学基金项目(6112016)

Ectopic-overexpression of AmHsa32 from Ammopiptanthus mongolicus Promoted Heat Tolerance in Nicotiana benthamiana

He Qian, Wang Yanping, Chen Yuzhen, Lu Cunfu   

  1. (College of Biological Sciences and Biotechnology,National Engineering Laboratory for Tree Breeding,Beijing Forestry University,Beijing 100083)
  • Received:2014-11-09 Published:2015-05-18 Online:2015-05-18

摘要: Hsa32是一类新型的热激蛋白,主要发现于陆地植物中,对植物抗逆性的获得起关键作用。AmHsa32是Hsa32的同源蛋白之一,是从沙冬青(Ammopiptanthus mongolicus)克隆得到的耐热性相关基因。成功构建了Pcambia2300-35S-AmHsa32-OCS植物表达载体,经农杆菌介导转入到本生烟中。经PCR和Western boltting检测证明AmHsa32已经被转入到本生烟基因组中。对转基因和野生型本生烟在高温胁迫下种子的萌发率、幼苗生长耐热性进行检测发现,转基因植物的抗热得到了明显提高。研究结果表明,AmHsa32可作为植物耐热基因育种的重要基因资源。

关键词: 沙冬青, AmHsa32, 转基因, 耐热性

Abstract: Hsa32 is a novel heat-shock protein(Hsp)and mainly found in land plants and essential for acquired thermo-tolerance. AmHsa32 as one orthologue of the Hsa32 gene, was isolated from a desert plant, Ammopiptanthus mongolicus(Leguminosae). In order to verify the function of AmHsa32, we constructed the plant expression vector Pcambia2300-35S-AmHsa32-OCS, and transferred it into Nicotiana benthamiana through the medium of Agrobacterium strain. PCR and Western blotting demonstrated that AmHsa32 had been integrated into the genome of Nicotiana benthamiana. Seed germination and seedling growth analysis indicated that overexpressing AmHsa32 resulted in enhanced tolerance to heat stresse in transgenic Nicotiana benthamiana. Our work suggests that AmHsa32 might be a valuable gene for plant resistant breeding with transgene technology.

Key words: Ammopiptanthus mongolicus, AmHsa32, transgene, thermotolerance