Comparative transcriptomic analysis reveals the mechanistic basis ofPib-mediated broad spectrum resistance againstMagnaporthe oryzae

文献类型： 外文期刊

第一作者： Qiu, Jiehua

作者： Qiu, Jiehua;Lu, Feifei;Meng, Shuai;Kou, Yanjun;Xiong, Meng;Shen, Xianglin

作者机构：

关键词： Magnaporthe oryzae; Resistant near isogenic line; RNA-seq; Broad-spectrum resistance; Pib; Redox

期刊名称：FUNCTIONAL & INTEGRATIVE GENOMICS （ 影响因子：3.41； 五年影响因子：3.616 ）

ISSN： 1438-793X

年卷期： 2020 年 20 卷 6 期

页码：

收录情况： SCI

摘要： Rice blast, caused by the fungusMagnaporthe oryzae, is a highly damaging disease. Introducing genes, which confer a broad spectrum resistance to the disease, such asPib, makes an important contribution to protecting rice production. However, little is known regarding the mechanistic basis of the products of such genes. In this study, transcriptome of the cultivar Lijiangxintuanheigu (LTH) and its monogenic IRBLb-B which harborsPibtreated withM. oryzaewere compared.Among the many genes responding transcriptionally to infection were some encoding products involved in the metabolism of ROS (reactive oxygen species), in jasmonate (JA) metabolism, and WRKY transcription factors, receptor kinases, and resistance response signal modulation. The down-regulation of genes encoding peroxiredoxin and glutathione S transferases implied that the redox homeostasis is essential for the expression ofPib-mediated resistance. The up-regulation of seven disease resistance-related genes, including three encoding a NBS-LRR protein, indicated that disease resistance-related genes are likely tend to support the expression ofPibresistance. These data revealed that potential candidate genes and transcriptional reprogramming were involved inPib-mediated resistance mechanisms.

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