Inhibition of the spread of endophytic Sporisorium reilianum renders maize resistance to head smut
文献类型: 外文期刊
作者: Zhao, Xianrong 1 ; Ye, Jianrong 1 ; Wei, Lai 1 ; Zhang, Nan 1 ; Xing, Yuexian 3 ; Zuo, Weiliang 1 ; Chao, Qing 1 ; Tan, G 1 ;
作者机构: 1.China Agr Univ, Natl Maize Improvement Ctr China, Beijing 100193, Peoples R China
2.Chinese Acad Sci, Inst Genet & Dev Biol, Beijing 100101, Peoples R China
3.Jilin Acad Agr Sci, Maize Res Inst, Gongzhuling 136100, Peoples R China
4.Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China
关键词: Head smut;Sporisorium reilianum;Maize;Resistance
期刊名称:CROP JOURNAL ( 影响因子:4.407; 五年影响因子:5.687 )
ISSN: 2095-5421
年卷期: 2015 年 3 卷 2 期
页码:
收录情况: SCI
摘要: Head smut, caused by the fungal pathogen Sporisorium reilianum, poses a grave threat to maize (Zea mays) production worldwide. Here we report cytological and molecular evidence for maize resistance to head smut. During early stages of root infection, S. reilianum mycelium was capable of penetrating the root epidermis of both resistant (Ji1037) and susceptible (HZ4) inbred lines. S. reilianum hyphae were observed in the root-stem junction at 6 days after inoculation. In an attempt to monitor hyphal spread within the maize plant, a highly specific and sensitive real-time PCR method was established to estimate the hyphal content in infected maize tissues. During the upward growth of endophytic S. reilianum, the extent of hyphal spread was markedly different between Ji1037 and HZ4. Very little or no pathogen was detected in aerial parts of Ji1037, whereas large amounts of pathogen accumulated in aboveground tissues, particularly inflorescences, of HZ4. Thus, maize resistance to S. reilianum was achieved mainly by inhibition of endophytic hyphal growth rather than by prevention of early-root penetration by the pathogen. (C) 2015 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V.
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