Lipid peroxidation and jasmonic acid involved in the development of soft-nose disorder in ‘Keitt’ mango during storage

Soft-nose, as one of the physiological disorders of mango fruit, results in a reduction of the commodity rate. In this paper, the results showed that reactive oxygen species (ROS) accumulated capacity was higher than the scavenging ability of ROS in soft-nose mango fruit since ROS generation. Meanwhile, fatty acid content and the expression of genes involved in fatty acid metabolism in the soft-nose fruit increased. <i>α</i>-linolenic acid and jasmonic acid (JA) particularly increased, the activities of allene oxide synthase (AOS) and allene oxide cyclase (AOC) increased, and the expressions of <i>MiPLDβ2</i>, <i>MiFAD3</i>, <i>MiACSL7</i> and <i>MiACOX1</i> up-regulated in soft-nose mango fruit. Thus, ROS accumulation along with lipid peroxidation and JA may be associated with the development of postharvest soft-nose disorder in mango fruit.