Postharvest changes of mangosteen fruits affected by dipping in parafinnic oil.
Issarakraisila M., Vajasat J.
5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004. page 12
2004
บทคัดย่อ
To extend mongosteen shelf life, whole fruits were dipped in parafinnic oil or only stalk and sepals of fruit were sprayed.After treatments fruits were kept in a cold room at 18 °C and 80% relative humidity.Delay of wilting and colour changes of stalk and sepals was observed as the concentration of dipping increase.On the other hand that delay was not occurred when stalk and sepals were sprayed.After storage for 17 days, weight loss and soluble solids of fruits which were dipped in 0, 1, 2, 4 or 8% of parafinnic oil were 8.0, 6.8, 6.9, 5.3 or 5.4% and 18.2, 17.3, 16.0, 15.0 or 14.0%, respectively.While weight loss and soluble solids of fruits which stalk and sepals were sprayed by 0, 1, 2, 4 or 8% of parafinnic oil were 8.2, 7.0,8.0, 6.9, or 6.9% and 15.3, 16.4, 17.0, 16.1 or 17.0%, respectively.Changes of peel colour from the stage at colour break to violet and tritratable acids in fruit juice were not affected by dip or spray treatments.
Appearance and eating quality of pulp in every treatment were marketable accepted after 17 days of storage.Shelf life of the control was 12 days and was not different from those of spry treatments while the shelf life of dip treatment at 8% of parafinnic oil was 16 days.The results showed that dipping with parafinnic oil could delay the ripening of mangosteen fruits and ripening had a major effect on the senescence of stalk and sepals.