茉莉酸和乙烯信号转导途径参与花生应答果腐病病原菌侵染的转录组测序分析

Transcriptomic Profiling Reveals the JA and ET Signal Transduction during Field Peanut Pod Rot Pathogen Infection

花生果腐病是花生生产上的一种重要病害,对花生的产量和品质构成了严重威胁。本研究以花育20号感病前后籽仁为样品,进行转录组测序,得到Unigene 60756个,其中表达量上调的基因10147个,下调的基因4334个;GO富集分析表明,差异表达基因被分类到24种细胞组分、5种分子功能和23种生物过程中;KEGG富集分析发现有4291个差异基因被注释到34条代谢通路中。筛选得到多条花生响应果腐病相关的激素信号转导途径,通过分析相关基因的表达图谱,推测花生可能通过JA/ET介导的抗病途径来抵抗果腐病病原菌的侵染。

Pod rot,an important disease affecting peanut production,causes serious damage to peanut yield and quality.In this study,RNA sequencing analysis was performed with peanut cultivar Huayu20 kernels that infected with pod rot disease in field,and that uninfected kernels acting as control.As a result,a total of 60,756 unigenes were obtained,among which the expression of 10,147 genes were up-regulated and 4,334 genes were down-regulated.Further,Gene Ontology enrichment analysis showed that the differentially expressed genes(DEGs)were assigned to 24 cellular components,5 molecular functions and 23 biological processes.Through Kyoto Encyclopedia of Genes and Genomes enrichment analysis,a total of 4,291 DEGs were mapped to 34 metabolic pathways.We identified multiple hormone signal transduction pathways that were responsive to pod rot disease infection.Based on the expression pattern of related genes,we speculate that peanuts may resist pod rot disease infection through jasmonic acid-and ethylene-mediated pathways.