Plant Diversity ›› 2015, Vol. 37 ›› Issue (05): 577-585.DOI: 10.7677/ynzwyj201515022

• Articles • Previous Articles     Next Articles

Overexpression of AtWRKY71 Affects Plant’s Defense Response to Pseudomonas syringae

 WANG  Qi-Juan-1、2, CHEN  Li-Gang-1**, TU  Di-Qiu-1   

  1. 1Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences,
    Kunming 650223, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2015-02-03 Online:2015-09-25 Published:2015-03-27
  • Supported by:

    国家自然科学基金项目 (31200915) 和中国科学院西部之光、中国科学院青年创新促进会项目


The WRKY transcription factor superfamily plays important roles in numerous processes, such as plant stress responses and plant development. In this study, we first investigated the expression profiles of AtWRKY71 in different organs and developmental stages and under different hormone treatments and pathogen infection. In 12w old WT plants, AtWRKY71 mainly expressed in roots and had stronger expression in 8d old seedlings than that of 14d old seedlings. Under various treatments, AtWRKY71 was induced by SA, ET or JA treatment and infection of the bacterial pathogen Psyringae. Furthermore, compared with wild type, plants constitutively expressing AtWRKY71 were smaller in size and had slightly serrated leaves. Further analysis showed that overexpression of AtWRKY71 increased the sensitivity to the bacterial pathogen Psyringae. The enhanced susceptibility was associated with reduced expression of salicylic acidregulated PR genes. These results suggest that AtWRKY71 is a novel regulator in both plant growth and development and also in plant defense responses.

Key words: AtWRKY71, WRKY transcription factor, Transgenic plant, Defense response

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