ISHS Acta Horticulturae 804: Europe-Asia Symposium on Quality Management in Postharvest Systems - Eurasia 2007
HOT WATER DIPPING INDUCED CHILLING RESISTANCE OF HARVESTED BANANA FRUIT |
| Authors: | Hai-bo Wang, Zhao-qi Zhang, Xue-mei Huang, Yue-ming Jiang, Xue-qun Pang |
| Keywords: | hot water dipping, chilling injury, H2O2, banana fruit |
| Abstract:
Banana fruit are highly susceptible to chilling injury during storage at low temperature. The effects of hot water dipping (HWD) on chilling injury index, cell membrane permeability, H2O2 content, and changes in activities of catalase (CAT), ascorbate peroxidase (APX), and Ca2+-ATPase of harvested banana fruit were investigated. Banana fruit were dipped for 3 min. into hot water at 52°C and then stored at 7°C for 10 days. The chilling injury index of banana fruit stored at 7°C gradually increased. Application of HWD reduced the chilling injury of the fruit, suggesting it’s putative role in increasing chilling resistance. This increased chilling resistance by HWD was further examined. HWD-treated banana fruit exhibited lower levels of membrane permeability and H2O2 content, and higher activities of CAT and APX in peel tissues. It was also found that HWD induced the activity of Ca2+-ATPase of banana fruit, implying the possible involvement of calcium signaling in increased chilling resistance of the fruit. | |
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