Integrative metabolomics and transcriptomics analyses reveal pivotal regulatory mechanisms of 1-methylcyclopropene in maintaining postharvest storage quality of ‘Fuji’ apples

Abstract In this study, integrative metabolomics and transcriptomics analyses were conducted to investigate the effects of 1-methylcyclopropene (1-MCP) on apple fruit quality during long-term cold storage. The results showed that 1-MCP (1 ?L/L) treatment could maintain fruits apparent (i.e. external color firmness), inhibit increase rot rate soluble solids content/titratable acidity ratio, decrease ethylene release, respiratory intensity storage, extend shelf life. Moreover, had accumulation many qualities related metabolite gene expression in fruits. affected genes metabolism at early stage specifically those glycolysis tricarboxylic acid cycle pathways. Genes degradation sucrose, starch, cellulose inhibited, some starch synthesis up-regulated by 1-MCP. Apart from signal transduction being inhibited 1-MCP, several enzymes (pectinesterase, pectate lyase, polygalacturonase) involved pectin degradation, products cell wall d-galacturonic d-glucuronic acid) also strongly further maintaining firmness. Cysteine, as precursor glutathione (GSH) plant resistance, synthase gene. However, cyanoalanine amino utilization pathways was suppressed Collectively, postharvest