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Evaluation of Resistance Resources and Analysis of Resistance Mechanisms of Maize to Stalk Rot Caused by Fusarium graminearum

文献类型： 外文期刊

作者： Zhang, Xue 1 ; Zheng, Suli 1 ; Yu, Miao 1 ; Xu, Chuzhen 1 ; Li, Yonggang 1 ; Sun, Lei 2 ; Hu, Guanghi 3 ; Yang, Jianfei 3 ; Qiu, Xiaojing 1 ;

作者机构： 1.Northeast Agr Univ, Coll Plant Protect, Harbin 150030, Heilongjiang, Peoples R China

2.Heilongjiang Acad Black Soil Conservat & Utilizat, Harbin 150086, Peoples R China

3.Heilongjiang Acad Agr Sci, Inst Maize Res, Harbin 150086, Peoples R China

关键词： Fusarium graminearum; maize inbred line; resistance genes; resistance mechanism; transcriptome

期刊名称：PLANT DISEASE （ 影响因子：4.5； 五年影响因子：5.0 ）

ISSN： 0191-2917

年卷期： 2024 年 108 卷 2 期

页码：

收录情况： SCI

摘要： Stalk rot is one of the most destructive and widely distributed diseases in maize plants worldwide. Research on the performance and resistance mechanisms of maize against stem rot is constantly improving. In this study, among 120 inbred maize lines infected by Fusarium graminearum using the injection method, 4 lines (3.33%) were highly resistant to stalk rot, 28 lines (23.33%) were resistant, 57 lines (47.50%) were susceptible, and 31 lines (25.84%) were highly susceptible. The inbred lines 18N10118 and 18N10370 were the most resistant and susceptible with disease indices of 7.5 and 75.6, respectively. Treatment of resistant and susceptible maize inbred seedlings with F. graminearum showed that root hair growth of the susceptible inbred lines was significantly inhibited, and a large number of hyphae attached and adsorbed multiple conidia near the root system. However, the resistant inbred lines were delayed and inconspicuous, with only a few hyphae and spores appearing near the root system. Compared with susceptible inbred lines, resistant maize inbred line seedlings treated with F. graminearum exhibited elevated activities of catalase, phenylalanine ammonia-lyase, polyphenol oxidase, and superoxide dismutase. We identified 153 genes related to disease resistance by transcriptome analysis. The mitogen-activated protein kinase signaling and peroxisome pathways mainly regulated the resistance mechanism of maize inbred lines to F. graminearum infection. These two pathways might play an important role in the disease resistance mechanism, and the function of genes in the two pathways must be further studied, which might provide a theoretical basis for further understanding the molecular resistance mechanism of stalk rot and resistance gene mining.

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