›› 2012, Vol. 14 ›› Issue (5): 28-32.DOI: 10.3969/j.issn.1008-0864.2012.05.05

• 生物技术 生命科学 • 上一篇    下一篇

过量表达OsAPX1基因增强水稻的抗热和抗氧化能力

安辽原1,牛向丽1,2,黄龙翔1,刘永胜1,2*   

  1. (1.重庆大学农业及生命科学研究院, 重庆 |400030|2.合肥工业大学生物与食品工程学院, 合肥 |230009)
  • 收稿日期:2012-04-05 修回日期:2012-04-24 出版日期:2012-10-15 发布日期:2012-10-15
  • 通讯作者: 刘永胜,教授,博士生导师,主要从事植物功能基因学研究。E-mail:liuyongsheng1122@yahoo.com.cn
  • 作者简介:安辽原,硕士研究生,研究方向为水稻功能基因组学。E-mail:xin2592138le@126.com。
  • 基金资助:

    重庆市科技攻关项目(2010AA1019);国家转基因生物新品种培育重大专项(2009ZX08001-011B;2009ZX08009-072B)资助。

Over-expression of OsAPX1 Gene Enhances Heat Resistance and Anti-oxidant Tolerance in Rice

AN Liao-yuan1, NIU Xiang-li1,2, HUANG Long-xiang1, LIU Yong-sheng1,2*   

  1. (1.Institute of Agriculture and Life Sciences, Chongqing University, Chongqing 400030|2.School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China)
  • Received:2012-04-05 Revised:2012-04-24 Online:2012-10-15 Published:2012-10-15

摘要:

抗坏血酸过氧化物酶(ascorbate peroxidase, APX)是植物体内活性氧清除的关键酶,在植物逆境应答中发挥着重要作用。通过构建水稻OsAPX1基因的过表达植物载体,利用根癌农杆菌介导法导入水稻品种日本晴获得转基因植株。半定量RT-PCR分析表明,转基因植株中OsAPX1表达水平明显提高。田间T0代过表达转基因植株在高温条件下的秕谷率显著低于野生型。热激胁迫实验显示,转基因株系比野生型具有更强的耐热性。在过氧化氢胁迫下,转基因植株也表现出更强的抗氧化能力。该结果表明水稻OsAPX1基因在活性氧清除中发挥功能,过量表达OsAPX1能够增强水稻的高温抗性。

关键词: 抗坏血酸过氧化物酶;活性氧;过量表达;抗热;抗氧化

Abstract:

Ascorbate peroxidase (APX), a key enzyme to scavenge active oxygen species in plants, plays an important role in stress responses. In the study, over-expression vector of rice OsAPX1 gene was constructed and introduced into rice cultivar Nipponbare by Agrobacterium-mediated transformation. The semi-quantitative RT-PCR analysis revealed the remarkable increase of OsAPX1 level in transgenic plants. The primary generation (T0) over-expression lines showed significant lower sterile rates in field under high temperature than that of the wild type. The transgenic plants exhibited improved resistance to heat and hydrogen peroxide. It suggested that rice OsAPX1 gene has an effect on active oxygen scavenging, and over-expression of OsAPX1 could enhance heat tolerance in rice.

Key words: ascorbate peroxidase, active oxygen species, over-expression, heat resistance, anti-oxidation

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