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ISHS Acta Horticulturae 1206: XIII International Symposium on Plant Bioregulators in Fruit Production

Effects of fluridone or 1-naphthaleneacetic acid on fruit drop and quality of longkong fruit after harvest

Authors:   S. Namsri, N. Pongprasert, P. Boonyaritthongchai, S. Kondo, V. Srilaong
Keywords:   NAA, postharvest quality
DOI:   10.17660/ActaHortic.2018.1206.12
Abstract:
The effects of fluridone and 1-naphthaleneacetic acid (NAA) on fruit drop and quality changes of longkong fruit after harvesting were investigated. Longkong racemes were dipped in 50 Ámol L-1 of fluridone solution or dipped in 1000 Ámol L-1 NAA solution for 5 min. Then, the fruits were stored at 25░C. The results showed that dipping longkong fruit in 50 Ámol L-1 fluridone solution and dipping in 1000 Ámol L-1 NAA solution significantly delayed fruit drop. At the same time, the results also showed that the percentages of fruit drop in the control that were dipped in distilled water increased during the storage period. Longkong fruit dipped in 50 Ámol L-1 fluridone solution and dipped in 1000 Ámol L-1 NAA solution showed inhibition of the ABA synthesis. Furthermore, it showed the ability to inhibit ethylene production and retard fruit color changes and browning on the peel of longkong with storage life extension for 8 days. There is no significant difference in terms of internal quality, such as total ascorbic acid content and total phenolic content in all treatments. Longkong dipped in 50 Ámol L-1 fluridone solution showed lower titratable acidity, total soluble solids, and total sugar content compared with other treatments. In sum, dipping longkong raceme in fluridone solution can be used as an alternative method for minimizing the fruit drop and maintaining the quality of longkong after harvesting.

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