WRKY转录因子表达谱的研究进展

Advance on Expression Profile of Transcription Factor WRKY

环境胁迫对植物的生长发育造成重大影响,因此,提高植物的抗逆性是农业面临的重要问题。自然界中存在多种抗逆基因,如抗盐基因、抗旱基因、抗寒基因等。利用植物基因工程和分子生物学技术提高植物对逆境的适应性及其抗逆分子机制的研究已成为当今热点。WRKY转录因子是一类参与多种胁迫反应的诱导型转录因子,本文综述了WRKY转录因子家族的结构特点、WRKY转录因子在非生物胁迫(高温、低温、干旱、盐)、外源物质(激素及O3)处理及生物胁迫下的表达模式。各种胁迫下的表达谱均呈现不同特点,这些差异表达可能与它们所行使的不同生物学功能有关。

Environmental stress has an adverse effect on the growth of plants and the productivity of crops, so it is very important for agriculture to improve plant resistance to stress. Expression of a variety of genes is induced by these stresses in various plants, such as salt-resistant, drought-resistant, chilling-resistant genes and so on. It has become a hotspot to enhance plant adaptability to stress and study its molecular mechanism by plant genetic engineering and molecular biological technology. WRKY transcription factor is an inducible transcription factor which is involved in a variety of stress responses. In this paper, the structural characteristics of WRKY transcription factor family, and the expression profile of WRKY transcription factors in abiotic stresses （heat, cold, drought and salt）, in exogenous substances （hormones and O3） and in biotic stresses are reviewed. The expression profile in different stress showed different characteristics, which may be related to the different biological functions of WRKY transcription factors.