Irradiation reduces superficial scald by downregulating ethylene and α-farnesene biosynthetic enzymes in ‘Granny Smith’ apples

Superficial scald is a postharvest disorder of apples related to increased ethylene production in stored fruit which leads α-farnesene accumulation and oxidation. Ionizing irradiation inhibits has been shown reduce superficial scald, but this phenomenon not explored at the molecular level. The goal study was determine effect on gene expression enzymes ‘Granny Smith’ apples. Irradiation 310 Gy controlled severity incidence inhibited rise AFS1 up 90 d cold storage followed by 7 room temperature, while 1000 suppressed symptoms for either 180 storage, showed internal browning. both doses reduced formation more than 50% with concomitant decline ACO enzyme activity as compared control, increase ACS1 expression, without same ACO1 gene. treatment may through inhibition biosynthesis.