view:23178 Last Update: 2019-9-30
Farhang Razavi; Roghayeh Mahmudi; Vali Rabiei; Mortaza Soleimani Aghdam; Ali Soleimani
Glycine betaine treatment attenates chilling injury and maintains nutritional quality of hawthorn fruit during storage at low temperature
Low-temperature storage delays senescence and helps to maintains nutritional quality, which recommended for extending the postharvest life of fruit and vegetable. But, under low temperature storage, hawthorn fruit pitting as a physiological manifestation of chilling injury (CI) symptom can develop visually. In this study, the eﬀects of glycinebetaine(GB)treatmentappliedbyimmersion(0,2.5,5and10mM,for15minat20°C)onchillinginjury and nutritional quality of hawthorn fruit during storage at 1°C for 20days was investigated. The results showed that GB treatment, especially at 10mM, signiﬁcantly delayed fruit pitting development. Also, GB treated hawthorn fruit exhibited signiﬁcantly higher endogenous GB and proline accumulation, which was concurrent with higher antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) activity leading to lower H2O2 accumulation. Also, hawthorn fruit treated with GB exhibited signiﬁcantly higher phenols, ﬂavonoids and anthocyanins accumulation resulting from higher phenylalanine ammonia lyase (PAL) enzyme activity, which concomitant with higher ascorbic acid accumulation leading to higher DPPH scavenging capacity during storage at 1°C for 20days. These results suggested that GB treatment not only can be used as a useful strategy for attenuating chilling injury of hawthorn fruit by enhancing antioxidant enzymes activity leading to lower reactive oxygen species (ROS) accumulation, but also is useful for maintaining nutritional quality of hawthorn fruit by triggering antioxidant molecules accumulation which is beneﬁcial for human health.