TaNAC6s are involved in the basal and broad-spectrum resistance to powdery mildew in wheat
文献类型： 外文期刊
作者： Zhou, Weihao 1 ; Qian, Chen 2 ; Li, Ruochen 1 ; Zhou, Shuang 1 ; Zhang, Ruiqi 1 ; Xiao, Jin 1 ; Wang, Xiue 1 ; Zhang, Sho 1 ;
作者机构： 1.Nanjing Agr Univ, Cytogenet Inst, State Key Lab Crop Genet & Germplasm Enhancement, JCIC MCP, Nanjing 210095, Jiangsu, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Anim Sci, Lab Forage Breeding, Nanjing 210095, Jiangsu, Peoples R China
关键词： TaNAC6; Powdery mildew; Broad-spectrum; Basal resistance
期刊名称：PLANT SCIENCE （ 影响因子：4.729； 五年影响因子：5.132 ）
ISSN： 0168-9452
年卷期： 2018 年 277 卷
页码：
收录情况： SCI
摘要： NACs are important transcriptional factors involved in growth and development as well as responses to abiotic and biotic stresses in plants. In this study, TaNAC6 was identified as a differentially expressed gene between two lines with broad-spectrum resistance to powdery mildew, NAU9918 and OBStpk-v, and their corresponding susceptible isogenic lines, SM-1 and Yangmai158, after Bgt inoculation by transcriptome analysis. Then, three homoeologous genes of TaNAC6 were cloned and named as TaNAC6-A, TaNAC6-B and TaNAC6-D, respectively. Each member of TaNAC6s was subcellular localized to the nucleus and displayed the transcriptional activation activity. However, the responses of them to pathogens and phytohormones were different. Transient overexpression of each TaNAC6 reduced the haustorium index of Yangmai158, and stable transformation of TaNAC6-A enhanced its resistance against Bgt, implying that TaNAC6s play important roles in basal resistance. Silencing of TaNAC6s compromised the resistance of OEStpk-v and NAU9918 suggesting that TaNAC6s play positive roles in the broad-spectrum resistance against Bgt. TaNAC6s might be induced by JA and then feedback regulate the JA pathway leading to improved resistance to Bgt. The role of TaNAC6s and their orthologous genes HvNAC6 and ATAF1 in the powdery mildew resistance implied these NAC6 genes share a common signal pathway across species.
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