Effects of Gum Arabic Coatings Enriched with Lemongrass Essential Oil and Pomegranate Peel Extract on Quality Maintenance of Pomegranate Whole Fruit and Arils

被引:12
作者
Kawhena, Tatenda Gift [1 ,2 ]
Opara, Umezuruike Linus [2 ,3 ]
Fawole, Olaniyi Amos [4 ]
机构
[1] Stellenbosch Univ, Fac AgriSci, Dept Hort Sci, ZA-7600 Stellenbosch, South Africa
[2] Stellenbosch Univ, SARChI Postharvest Technol Res Lab, Africa Inst Postharvest Technol, Fac AgriSci, ZA-7600 Stellenbosch, South Africa
[3] UNESCO Int Ctr Biotechnol, Nsukka 410001, Enugu State, Nigeria
[4] Univ Johannesburg, Dept Bot & Plant Biotechnol, Postharvest Res Lab, ZA-2006 Johannesburg, South Africa
基金
新加坡国家研究基金会;
关键词
gum arabic; Punica granatum; coating; decay; PUNICA-GRANATUM L; PLANT ESSENTIAL OILS; LONG-TERM STORAGE; SHELF-LIFE; EDIBLE COATINGS; ANTIOXIDANT ACTIVITY; POSTHARVEST QUALITY; COLD-STORAGE; BIOACTIVE COMPOUNDS; PHENOLIC-COMPOUNDS;
D O I
10.3390/foods11040593
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
The effects of gum arabic coatings combined with lemongrass oil and/or pomegranate peel extract on freshly harvested mature 'Wonderful' pomegranate fruit were studied. Fruit were coated with gum arabic (GA) (1.5% w/v) alone or enriched with lemongrass oil (LM) (0.1% v/v) and/or pomegranate peel extract (PP) (1% w/v). Fruit were packed into standard open top ventilated cartons (dimensions: 0.40 m long, 0.30 m wide and 0.12 m high), and stored for 6 weeks at 5 +/- 1 degrees C (90% RH). Evaluations were made every 2 weeks of cold storage and after 5 d of shelf life (20 degrees C and 65% RH). Fruit coated with GA + PP (4.09%) and GA + PP + LM (4.21%) coatings recorded the least cumulative weight loss compared to the uncoated control (9.87%). After 6 weeks, uncoated control and GA + PP + LM recorded the highest (24.55 mg CO(2)Kg(-1)h(-1)) and lowest (10.76 mg CO(2)Kg(-1)h(-1)) respiration rate, respectively. Coating treatments reduced the incidence of decay and treatments GA + LM + PP and GA + PP recorded the highest total flavonoid content between 2 and 6 weeks of storage. The findings suggest that GA coatings with/without LM and PP can be a beneficial postharvest treatment for 'Wonderful' pomegranates to reduce weight loss and decay development during cold storage.
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页数:28
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