Metabolome and transcriptome analysis of postharvest peach fruit in response to fungal pathogen Monilinia fructicola infection
Chen Cheng, Chengying Yan, Cheng-Tian Qi, Xiuli Zhao, Lingxiao Liu, Yanyin Guo, Peng Leng, Jie Sun, Ahmtijiang, Jun Liu, Yun‐Guo Liu
Abstract
Little is known about the genes and metabolite features of postharvest peach fruit in response to Monilinia fructicola infection. In this study, transcriptomic and metabolomic approaches were used to study the induction response of M. fructicola at different stages of infection. By comparing the gene expression profiles of each group, for the tissue gene expression at 48 h after M. fructicola infection, most differentially expressed genes (DEGs) were up-regulated at 12 h after M. fructicola infection. In addition, according to the gene ontology (GO) and Kyoto Encyclopedia of Gene and Genome (KEGG) pathway enrichment analysis, peach can produce complex defense responses to the M. fructicola infection. Moreover, a total of 357 differential metabolites were detected in the metabolome, and they were mainly distributed in nucleic acids, amino acids, organic acids, lipids, peptides, cofactors and vitamins. Transcriptome and metabolome data were simultaneously enriched in the phytohormone signal transduction pathway. After 12 h of infection, peach responded to infection through jasmonic acid as a signal molecule, and after 48 h of infection, peach responded to infection through salicylic acid as a signal molecule. This study put forward the molecular framework of peach systemic resistance induced by M. fructicola.