Potential roles of WRKY transcription factors in regulating host defense responses during Aspergillus flavus infection of immature maize kernels

被引:26
|
作者
Fountain, Jake C. [1 ,2 ]
Raruang, Yenjit [1 ]
Luo, Meng [3 ]
Brown, Robert L. [4 ]
Guo, Baozhu [5 ]
Chen, Zhi-Yuan [1 ]
机构
[1] Louisiana State Univ, Ctr Agr, Dept Plant Pathol & Crop Physiol, Baton Rouge, LA 70803 USA
[2] Univ Georgia, Dept Plant Pathol, Tifton, GA 31794 USA
[3] Louisiana State Univ, Hlth Sci Ctr, New Orleans, LA 70112 USA
[4] USDA ARS, So Reg Res Ctr, New Orleans, LA 70124 USA
[5] USDA ARS, Crop Protect & Management Res Unit, Tifton, GA 31794 USA
关键词
Aspergillus flavus; Real-time PCR; WRKY transcription factors; Maize; QUANTITATIVE TRAIT LOCI; AFLATOXIN CONTAMINATION; STRESS TOLERANCE; EAR ROT; RESISTANCE; ARABIDOPSIS; EXPRESSION; PROTEINS; CORN; IDENTIFICATION;
D O I
10.1016/j.pmpp.2014.11.005
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The mechanisms regulating the expression of maize resistance genes against Aspergillus flavus are poorly understood. This study examined the potential roles of six WRKY transcription factors and the expression of three pathway indicator genes in response to A. flavus inoculation in B73 (susceptible) and TZAR101 (resistant). The genes ZmWRKY19, ZmWRKY53, and ZmWRKY67 were found to possess elevated expression in TZAR101. ZmNPR1 expression was induced by inoculation in TZAR101 without concurrent induction of ZmPR-1, possibly due to the induction of ZmERF1. These findings indicate that WRKY transcription factors are involved in resistance and that salicylic acid and ethylene signaling may coordinate defense responses. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:31 / 40
页数:10
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