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Comparison of Fruit Quality and Antioxidant Compound of 'Niitaka' Pear Trees Grown in the Organically and Conventionally Managed Systems
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 Title & Authors
Comparison of Fruit Quality and Antioxidant Compound of 'Niitaka' Pear Trees Grown in the Organically and Conventionally Managed Systems
Choi, Hyun-Sug; Li, Xiong; Kim, Wol-Soo; Lee, Youn;
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The study was established to compare fruit qualities and antioxidant compounds in 'Niitaka' pear (Pyrus pyriforia) trees grown in the organic and conventional farming systems. Fruits in the organic system appeared to have dark red color on the fruit surface. Fruit weight, soluble solids, acidity, firmness, and stone cells were not different between the farming systems. Organic fruits had a greater potassium concentration than the conventional fruits, but phosphorous, calcium, and magnesium concentrations in fruits were not different between the treatments. Peel, flesh, and juice parts in the organic fruits had greater phenolic compounds compared to the conventional fruits. Peel parts had much greater antioxidant compounds than the flesh parts, regardless of the treated-fruits. All fruits grown in the conventional and organic systems had a similar DPPH (, -diphenyl--picryl-hydrazyl) radical-scavenging activity in the peel, but flesh parts in organic fruits had a greater DPPH than the conventional fruits. Phenol and flavonoid compounds in the peel and flesh were positively related to the DPPH radical-scavenging activity. There were no significant differences for the nitrite scavenging activity in the peel and flesh parts between the treatments.
DPPH radical scavenging activity;Flavonoid;Phenol;Stone cell;
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