Antioxidant capacity and total phenolic content of air-dried cape gooseberry (Physalis peruviana L.) at different ripeness stages

Agronomía Colombiana

卷:32

Ángela Mateus-Gómez¹  Luz Patricia Restrepo-Sánchez¹  Carlos Eduardo Narváez-Cuenca¹ 

[1]Universidad Nacional de Colombia

关键词: fruta tropical;    alimento funcional;    polifenoles;   

DOI  :  10.15446/agron.colomb.v32n2.43731

来源: DOAJ

【 摘 要 】

Because the use of drying at high temperatures might negatively affect the functional properties of fruits, the effect of air-drying at 60°C on the total phenolic content (TPC) and antioxidant capacity (AOC) of cape gooseberry fruit was evaluated at three ripeness stages. The AOC was evaluated with 2,2'-azino-bis(3- ethylbenzothiazoline-6-sulfonic acid) (ABTS ), ferric reducing ability of plasma (FRAP), 1,1-diphenyl-2-picrylhydrazyl (DPPH), and beta-carotene-linoleate assays. The TPC and AOC increased in the fresh fruit as the ripeness stage increased. The TPC increased from 401.8±19.8 to 569.3±22.3 mg GA E/100 g dry weight (DW). The AOC values obtained with ABTS in the fresh fruit (ranging from 79.4±4.5 to 132.7±12.9 mumol trolox/g fruit DW) were comparable to those obtained with FRAP (ranging from 82.9±16.3 to 153.9±31.7 mumol trolox/g fruit DW). The values assessed with DPPH ranged from 21.0±3.2 to 34.1±5.1 mumol trolox/g fruit DW. The beta-carotene-linoleate assay gave values ranging from 5.8±1.1 to 12.7±2.0 mumol a-tocoferol/g fruit DW. Air-drying the cape gooseberry fruit had a small influence on the TPC. The air-dried fruit had AOC values ranging from 27 to 164% of the value of the fresh fruit. While the ABTS assay produced higher values in the air-dried fruit than in the fresh fruit, the FRAP, DPPH, and beta-carotene-linoleate assays resulted in lower values in the air-dried fruit.

【 授权许可】

Unknown