植物学报 ›› 2007, Vol. 24 ›› Issue (02): 208-217.

• 专题介绍 • 上一篇    下一篇

植物冷驯化相关基因研究进展

李慧 强胜   

  1. 南京农业大学杂草研究室, 南京 210095
  • 收稿日期:2006-05-10 修回日期:2006-09-23 出版日期:2007-03-01 发布日期:2007-03-01
  • 通讯作者: 强胜

Genes Involved in Cold Acclimation of Higher Plants

Hui Li, Sheng Qiang*   

  1. Weed Research Laboratory, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2006-05-10 Revised:2006-09-23 Online:2007-03-01 Published:2007-03-01
  • Contact: Sheng Qiang

摘要: 摘要 冷驯化是与提高植物抗冷性有关的生物化学及生理学过程, 主要包括寒驯化(cool acclimation)和冻驯化(freezing acdimation)。在冷驯化过程中, 植物体内许多基因在转录水平上的表达受到影响, 已经克隆了大量的相关基因,它们组成复杂的分子调控网络。目前研究表明不依赖ABA的低温信号转导途径是植物冷驯化机制的重要组成部分, 其中CBF/DREB1是该调控过程的关键转录因子, 与植物通过冷驯化而提高冰冻耐受能力密切相关。进一步利用转基因技术, 可有效地改善作物的耐冷性状。

Abstract: Abstract Cold acclimation is a biochemical and physiological process that involves improving the cold tolerance of plants and includes cool acclimation and freezing acclimation. The transcription levels of many genes in higher plants are influenced during cold acclimation, and many of these genes have been isolated and identified, revealing a complex regulation network. Transcriptome analysis revealed that the ABA-independent low-temperature signal transduction pathway plays a major role in the cold acclimation process. The CBF/DREB1 transcription factor works as a “master switch” to regulate the expression of cold-responsive genes containing the DRE/CRT cis-element and to help plants develop cold-tolerant abilities. The freezing-tolerant characteristic of crops can be enhanced through genetic engineering, especially by transforming the key transcription factors.