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Effects of chitosan coatings fused with medicinal plant extracts on postharvest quality and storage stability of purple passion fruit(Passiflora edulis ***)

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Food Quality and Safety 2022年第1期6卷 93-111页

作者： Kwanele A.Nxumalo Olaniyi A.Fawole Postharvest Research Laboratory Department of Botany and Plant BiotechnologyUniversity of JohannesburgAuckland ParkJohannesburgSouth Africa

Chitosan edible coating(Ch;2%,mass concentration)enriched with 2%of 0.1 mg/L Bidens pilosa(Ch+B),Lippia javanica(Ch+L),Syzygium cordatum(Ch+S),or Ximenia caffra(Ch+X)was applied as a composite edible coating in alleviating shrivel and maintaining the quality of purple passion fruit(Passiflora edulis ***).Treated fruit was dipped for 3 min in the coating solution,and control fruit was dipped in distilled *** fruit were stored at(8±2)℃and 90%±5%relative humidity(RH)for 32 *** was done every 8 d plus 3 d(20±2)℃and(50%±5%)RH to simulate retail *** of medicinal plant extracts in the chitosan matrix varied;lower ethylene production(82.42μL C_(2)H_(4)/(kg·h))was seen in fruit coated with Ch+S,and the lowest respiration rate(75 mL CO_(2)/(kg·h))was observed in fruit coated with Ch+*** control fruit showed the highest ethylene production(84.90μL C_(2)H_(4)/(kg·h))and respiration rate(117.98 mL CO_(2)/(kg·h)).Fruit coated with Ch+B had the lowest weight loss(41.67%),higher juice content(60.13%)and BrimA(3.31);while the control fruit had the highest weight loss(88.03%),lowest juice content(21.90%),and BrimA(2.49).Shrivel incidence was lowest(23.70%)on fruit coated with Ch+L and highest(83.30%)on the control *** coated with Ch+X had the lowest electrolyte leakage(71.40%),while the control fruit had the highest(91.97%).Fruit coated with chitosan alone performed better than the control fruit but did not exceed the quality of composite chitosan-coated *** on the principal component analysis,it can be concluded that passion fruit coated with Ch+B was more effective in alleviating shrivel incidence,better maintained the quality ofpassion fruit duringstorage,andshows potential for commercial applications.

关键词： Quality attributes anthocyanins perishability respiration granadilla

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