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

doi:10.7677/ynzwyj201515022

Abstract

Abstract:

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

CLC Number:

Q 786

WANG Qi-Juan, CHEN Li-Gang, TU Di-Qiu. Overexpression of AtWRKY71 Affects Plant’s Defense Response to Pseudomonas syringae[J]. Plant Diversity, 2015, 37(05): 577-585.

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