Ethylene-auxin crosstalk regulates postharvest fruit ripening process in apple

The ripening of climacteric fruits, such as apple, is represented by a series genetically programmed events orchestrated the action several hormones. In this study, we investigated existence hormonal crosstalk between ethylene and auxin during post-harvest three internationally known apple cultivars: 'Golden Delicious', 'Granny Smith' 'Fuji'. normal was impaired exogenous application 1-methylcyclopropene (1-MCP) that affected production physiological behaviour specific ethylene-related quality traits, fruit texture volatile organic compounds. 1-MCP induced, moreover, de-novo accumulation auxin. RNA-Seq wide-transcriptome analysis evidenced competition at level receptors induced cultivar-dependent transcriptional re-programming. DEGs annotation carried out through KEGG database identified most genes were assigned to plant hormone signaling transduction category, specifically related ethylene. interplay these two hormones further assessed candidate gene highlighted activation GH3 ILL genes, encoding key steps in process homeostasis mechanism. Our results showed compromised metabolism onset can stimulate, fashion, an initial synthesis de-conjugation tentative restore progression.