In this study, the polyphenols from Biluochun (Camellia sinensis (L.) O.Ktze.) tea old leaves were extracted and the optimal application concentration (1.25 mg/mL) was determined. Taking ‘Baifeng’ peach as experimental material, immerged in 1.25 mg/mL phenolic extract and 1.25 mg/mL phenolic extract+0.1% lysozyme for 10 min, and then stored at room temperature [(25±1) ℃] for 6 d, respectively. Fruit soaked with deionized water at the same time was taken as control. The changes in weight loss, superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) activities, total phenols, flavonoids, anthocyanins content, and the changes of DPPH free radicals and hydroxyl radical scavenging ability were determined. Results showed that polyphenols from Biluochun could activate the activities of SOD, CAT, and POD, elevate the contents of total phenols, anthocyanins and flavonoids, and enhance the scavenging capacity of DPPH free radicals and ·OH. In addition, polyphenols and lysozyme treatment could effectively improve the activities of CAT and POD, enhance ·OH scavenging activity, inhibit the progress of weightlessness, and shows a better fresh-keeping effect.
ZHANG Yuqing
,
ZHOU Liang
,
SHI Wenwei
,
ZHU Chenhui
,
YUAN Jiawei
,
WU Xiaoqin
. Study of polyphenol from Biluochun (Camellia sinensis (L.) O.Ktze.) old leaves on peach fruit preservation[J]. Food and Fermentation Industries, 2023
, 49(4)
: 117
-122
.
DOI: 10.13995/j.cnki.11-1802/ts.029818
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