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Comparative analysis reveals changes in transcriptomes of sugarcane upon infection by Leifsoniaxyli subsp. xyli

文献类型： 外文期刊

作者： Fu, Yu-Hua 1 ; Wei, Jin-Ju 2 ; Pan, Yong-Bao 3 ; Zhou, Xiang 1 ; He, Er-Qi 1 ; Liu, Rong 1 ; Huang, Hui 4 ; Lu, Jia-Ju 1 ; L 1 ;

作者机构： 1.Guizhou Acad Agr Sci, Inst Subtrop Crops, Guiyang 562400, Guizhou, Peoples R China

2.Guangxi Acad Agr Sci, Sugarcane Res Inst, Guangxi, Peoples R China

3.USDA ARS, Sugarcane Res Unit, SEA, Houma, LA 70361 USA

4.Huaihua Univ, Key Lab Res & Utilizat Ethnomed Plant Resources H, Huaihua, Peoples R China

关键词： plant hormone signalling transduction; plant-pathogen interaction; ratoon stunting disease; RNA-Seq; Saccharum spp

期刊名称：JOURNAL OF PHYTOPATHOLOGY （ 影响因子：1.789； 五年影响因子：1.574 ）

ISSN： 0931-1785

年卷期：

页码：

收录情况： SCI

摘要： Ratoon stunting disease (RSD) caused by bacterium Leifsoniaxyli subsp. xyli (Lxx) is a devastating disease of sugarcane over a large part of the world. Genetic improvement for RSD-resistant varieties is considered the most effective method to control the disease. However, genetic improvement of sugarcane is hindered by the limited information about the molecular mechanisms underlying Lxx pathogenicity and defence responses in sugarcane. In this study, genome-wide gene expression profiling was used to compare RSD-resistant (CP72-2086) and RSD-susceptible (GT11) genotypes at different infection time points in order to identify the candidate regulators for RSD resistance. A total of 14,494 differentially expressed genes (DEGs) were identified, indicating that dramatic changes had occurred in gene expression upon Lxx infection, especially in the susceptible genotype. Enrichment analysis showed that a large number of genes related to plant hormone signal transduction, phenylalanine metabolism, phenylpropanoid biosynthesis and starch and sucrose metabolism was responsible for sugarcane response to Lxx infection. Plant hormone signalling pathway genes were significantly differentially expressed at the early infection stage between the two genotypes. The resistant genotype chose the jasmonic acid- and ethylene-dependent host-defence pathways to resist Lxx infection, whereas the susceptible genotype preferred the salicylic acid-dependent host-defence pathways. These findings help unravel the molecular mechanisms of sugarcane plant-Lxx interactions and may pave the way for sugarcane breeding for disease resistance.

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