Papaya is a climacteric fruit that is widely cultivated in tropical countries and regions (O'Hare & Williams, 2014). Papaya fruit are in high demand in the international market because of their tasty flavor and health care effects (Ikram et al., 2015). However, the postharvest loss of papaya is extremely serious owing to its water transpiration, vigorous respiratory metabolism, high perishability and susceptibility to pathogens during transport and storage processes (Hu et al., 2012;Shadmani et al., 2015). Papayas are highly sensitive to low temperatures below 13°C and liable to chilling injury (CI) whose symptoms include pitting, scald and shriveling of the peel, water-soaking of the pulp, and failure to ripening, leading to a serious decline in fruit quality and commercial value (Pan et al., 2017;Sevillano et al., 2009). Therefore, it is of great importance to improve the chilling tolerance of chilling-sensitive fruits during storage and transportation under low temperature conditions. Numbers of approaches for alleviating papaya CI have been examined, in which postharvest applications including methyl jasmonate (González-