Influence of exogenous application of melatonin on biochemical changes of avocado fruit during ripening

Vu Thi Cam Tu; Huynh Thi Thanh Tra; Hoang Duc An; Le Duy Thanh; Thi Minh Nguyet Hoang; Truong Thi Hue

doi:10.15625/2615-9023/16690

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Authors

Vu Thi Cam Tu Quy Nhon University, Binh Dinh, Vietnam
Huynh Thi Thanh Tra Quy Nhon University, Binh Dinh, Vietnam
Hoang Duc An Quy Nhon University, Binh Dinh, Vietnam
Le Duy Thanh Quy Nhon University, Binh Dinh, Vietnam
Hoang Thi Minh Nguyet Vietnam National University of Agriculture, Ha Noi, Vietnam
Truong Thi Hue Quy Nhon University, Binh Dinh, Vietnam

DOI:

https://doi.org/10.15625/2615-9023/16690

Keywords:

Persea americana, melatonin, postharvest quality, biochemical parameter, phenolic compound.

Abstract

Melatonin (MT) is considered as a plant growth regulator, has extensive functions and plays a prominent role in ripening and fruit senescence. However, there has been no report regarding the influence of melatonin on biochemical changes of avocado fruit (Persea americana Mill.) during ripening. In this study, the cultivar of avocado fruit “034” was treated with MT at 0.1 mM and 0.5 mM to evaluate biochemical changes relating to the fruit quality during storage at 22 ^oC ± 1 and 75–80% relative humidity. The results showed that postharvest fruits treated with MT effectively delayed the changes in ripening parameters and that the effectiveness depends on MT concentration. Application of MT (0.5 mM, immersion for 2 hours) to “034” avocado enhanced total phenol and flavonoid accumulation and maintained titratable acidity, total soluble solids, lipid and ascorbic acid contents. Furthermore, 0.5 mM MT treatment effectively suppressed the increase of total sugar and reduced weight loss compared with the control fruit after 12 days of storage. The results indicate that the MT application could be a useful tool to maintain avocado fruit quality during the postharvest stage.

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