Effects of BTH Treatment on Postharvest Disease Resistance and Storage Quality of Pitaya

doi:10.11924/j.issn.1000-6850.casb2021-0688

Abstract

Abstract:

The aim of this study is to explore the effects of postharvest benzothiadiazole (BTH) soaking on pitaya resistance to Gilbertella persicaria, storage quality and the activities of disease resistance related enzymes, so as to provide a theoretical and practical basis for the postharvest storage of pitaya fruits. The fruits of pitaya variety ‘Ruanzhi Dahong’ were used as materials for soaking with BTH at 0, 50, 100, 150 and 200 mg/L. And by observing the changes of the lesion area and disease index of the fruits inoculated with G. persicaria, and postharvest decay time and decay rate, the best BTH concentration was comprehensively screened out. Then the fruit quality and related enzyme activities of the control and under the optimal treatment concentration were further determined during storage. Compared with the control group, 100 mg/L BTH postharvest soaking treatment could significantly reduce the disease index of pitaya fruit inoculated with G. persicaria (P<0.05), significantly increase the total sugar content, reduce the titratable acid content, and enhance the activities of CAT, SOD, POD, CHI, GLU, and PAL. In summary, 100 mg/L BTH postharvest soaking treatment had the best effect on the resistance of pitaya fruits to G. persicaria, it could boost the activities of disease resistance related enzymes and antioxidant enzymes, improve the storage quality, and prolong the storage time of pitaya fruits.

Key words: pitaya, benzothiadiazole, postharvest, disease resistance, storage quality

CLC Number:

S667.9

BAO Yuanfang, ZHANG Lvping, ZHENG Wei, WANG Bin. Effects of BTH Treatment on Postharvest Disease Resistance and Storage Quality of Pitaya[J]. Chinese Agricultural Science Bulletin, 2022, 38(10): 134-140.

Figures/Tables 5

References 27

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