文献类型： 外文期刊

作者： Han, Suoyi ¹ ; Zhou, Ximeng ⁴ ; Shi, Lei ¹ ; Zhang, Huayang ¹ ; Geng, Yun ⁴ ; Fang, Yuanjin ⁶ ; Xia, Han ⁴ ; Liu, Hua ¹ ; Li, Pengcheng ⁴ ; Zhao, Shuzhen ⁴ ; Miao, Lijuan ¹ ; Hou, Lei ⁴ ; Zhang, Zhongxin ¹ ; Xu, Jing ¹ ; Ma, Changle ⁵ ; Wang, Zhenyu ⁷ ; Li, Hongyan ¹ ; Zheng, Zheng ¹ ; Huang, Bingyan ¹ ; Dong, Wenzhao ¹ ; Zhang, Jun ⁸ ; Tang, Fengshou ⁸ ; Li, Shaojian ⁷ ; Gao, Meng ⁷ ; Zhang, Xinyou ¹ ; Zhao, Chuanzhi ⁴ ; Wang, Xingjun ⁴ ;

作者机构： 1.Henan Acad Agr Sci, Henan Acad Crop Mol Breeding, Zhengzhou 450002, Peoples R China

2.Minist Agr, Key Lab Oil Crops Huang Huai Hai Plains, Zhengzhou 450002, Peoples R China

3.Henan Prov Key Lab Oil Crops Improvement, Zhengzhou 450002, Peoples R China

4.Shandong Acad Agr Sci, Inst Crop Germ Plasm Resources, Inst Biotechnol, Shandong Prov Key Lab Crop Genet Improvement Ecol, Jinan 250100, Peoples R China

5.Shandong Normal Univ, Coll Life Sci, Jinan 250014, Peoples R China

6.Kaifeng Acad Agr & Forestry, Kaifeng 475000, Peoples R China

7.Henan Acad Agr Sci, Inst Plant Protect, Zhengzhou 450000, Peoples R China

8.Henan Acad Agr Sci, Ind Crops Res Inst, Zhengzhou 450000, Peoples R China

9.Zhengzhou Xinqi Middle Sch, Zhengzhou 450000, Peoples R China

关键词： peanut; mutant; lesion mimic; NPR; MutMap; salicylic acid

期刊名称：PLANT JOURNAL （ 影响因子：6.486； 五年影响因子：7.666 ）

ISSN： 0960-7412

年卷期：

页码：

收录情况： SCI

摘要： Systemic acquired resistance is an essential immune response that triggers a broad-spectrum disease resistance throughout the plant. In the present study, we identified a peanut lesion mimic mutant m14 derived from an ethyl methane sulfonate-mutagenized mutant pool of peanut cultivar "Yuanza9102." Brown lesions were observed in the leaves of an m14 mutant from seedling stage to maturity. Using MutMap together with bulked segregation RNA analysis approaches, a G-to-A point mutation was identified in the exon region of candidate gene Arahy.R60CUW, which is the homolog of AtNPR3 (Nonexpresser of PR genes) in Arabidopsis. This point mutation caused a transition from Gly to Arg within the C-terminal transactivation domain of AhNPR3A. The mutation of AhNPR3A showed no effect in the induction of PR genes when treated with salicylic acid. Instead, the mutation resulted in upregulation of WRKY genes and several PR genes, including pathogenesis-related thaumatin- and chitinase-encoding genes, which is consistent with the resistant phenotype of m14 to leaf spot disease. Further study on the AhNPR3A gene will provide valuable insights into understanding the molecular mechanism of systemic acquired resistance in peanut. Moreover, our results indicated that a combination of MutMap and bulked segregation RNA analysis is an effective method for identifying genes from peanut mutants.