Hao Chen1, Yongfeng Wang1, Jiong Liu1, Tian Zhao1, Cuiling Yang1, Qunying Ding2, Yanfeng Zhang3, Jianxin Mu3, DaoJie Wang4. 1. State Key Laboratory of Crop Stress Adaptation and Improvement, College of Agriculture, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, China. 2. School of Biological and Environmental Engineering, Xi'an University, Xi'an, 710065, Shaanxi, China. 3. Hybrid Rapeseed Research Center of Shanxi Province, Yangling, 712100, Shaanxi, China. 4. State Key Laboratory of Crop Stress Adaptation and Improvement, College of Agriculture, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, China. wangdj@henu.edu.cn.
Abstract
MAIN CONCLUSION: A total of 278 BnWRKYs were identified and analyzed. Ectopic expression of BnWRKY149 and BnWRKY217 suggests that they function in the ABA signaling pathway. WRKY transcription factors play an important role in plant development, however, their function in Brassica napus L. abiotic stress response is still unclear. In this study, a total of 278 BnWRKY transcription factors were identified from the B. napus genome data, and they were subsequently distributed in three main groups. The protein motifs and classification of BnWRKY transcription factors were analyzed, and the locations of their corresponding encoding genes were mapped on the chromosomes of B. napus. Transcriptome analysis of rapeseed seedlings exposed to drought, salt, heat, cold and abscisic acid treatment revealed that 99 BnWRKYs responded to at least one of these stresses. The expression profiles of 12 BnWRKYs were examined with qPCR and the result coincided with RNA-seq analysis. Two genes of interest, BnWRKY149 and BnWRKY217 (homologs of AtWRKY40), were overexpressed in Arabidopsis, and the corresponding proteins were located to the nucleus. Transgene plants of BnWRKY149 and BnWRKY217 were less sensitive to ABA than Arabidopsis Col-0 plants, suggesting they might play important roles in the responses of rapeseed to abiotic stress.
MAIN CONCLUSION: A total of 278 BnWRKYs were identified and analyzed. Ectopic expression of BnWRKY149 and BnWRKY217 suggests that they function in the ABA signaling pathway. WRKY transcription factors play an important role in plant development, however, their function in Brassica napus L. abiotic stress response is still unclear. In this study, a total of 278 BnWRKY transcription factors were identified from the B. napus genome data, and they were subsequently distributed in three main groups. The protein motifs and classification of BnWRKY transcription factors were analyzed, and the locations of their corresponding encoding genes were mapped on the chromosomes of B. napus. Transcriptome analysis of rapeseed seedlings exposed to drought, salt, heat, cold and abscisic acid treatment revealed that 99 BnWRKYs responded to at least one of these stresses. The expression profiles of 12 BnWRKYs were examined with qPCR and the result coincided with RNA-seq analysis. Two genes of interest, BnWRKY149 and BnWRKY217 (homologs of AtWRKY40), were overexpressed in Arabidopsis, and the corresponding proteins were located to the nucleus. Transgene plants of BnWRKY149 and BnWRKY217 were less sensitive to ABA than Arabidopsis Col-0 plants, suggesting they might play important roles in the responses of rapeseed to abiotic stress.
Authors: A Dellagi; J Helibronn; A O Avrova; M Montesano; E T Palva; H E Stewart; I K Toth; D E Cooke; G D Lyon; P R Birch Journal: Mol Plant Microbe Interact Date: 2000-10 Impact factor: 4.171
Authors: Tsuneaki Asai; Guillaume Tena; Joulia Plotnikova; Matthew R Willmann; Wan-Ling Chiu; Lourdes Gomez-Gomez; Thomas Boller; Frederick M Ausubel; Jen Sheen Journal: Nature Date: 2002-02-28 Impact factor: 49.962