Transcriptome Analysis of the -Mediated Hypersensitive Response of Tomato to Infection.

Tomato leaf mold disease caused by () is one of the most common diseases affecting greenhouse tomato production. proteins can recognize corresponding AVR proteins produced by , and genes are associated with leaf mold resistance. Given that there are many physiological races of and that these races rapidly mutate, resistance to common genes (such as , , , and ) has decreased. In the field, Ont7813 plants (carrying the gene) show effective resistance to ; thus, these plants could be used as new, disease-resistant materials. To explore the mechanism of the -mediated resistance response, transcriptome sequencing was performed on three replicates each of Ont7813 () and Moneymaker (MM; carrying the gene) at 0, 9, and 15 days after inoculation (dai) for a total of 18 samples. In total, 943 genes were differentially expressed, specifically in the Ont7813 response process as compared to the Moneymaker response process. Gene ontology (GO) classification of these 943 differentially expressed genes (DEGs) showed that GO terms, including "hydrogen peroxide metabolic process (GO_Process)", "secondary active transmembrane transporter activity (GO_Function)", and "mismatch repair complex (GO_Component)", which were the same as 11 other GO terms, were significantly enriched. An analysis of the Kyoto Encyclopedia of Genes and Genomes (KEGG) revealed that many key regulatory genes of the -mediated resistance response processes were involved in the "plant hormone signal transduction" pathway, the "plant-pathogen interaction" pathway, and the "MAPK signaling pathway-plant" pathway. Moreover, during infection, jasmonic acid (JA) and salicylic acid (SA) contents significantly increased in Ont7813 at the early stage. These results lay a vital foundation for further understanding the molecular mechanism of the gene in response to infection.