Effect of Co-60-irradiation on postharvest quality and selected enzyme activities of Hypsizygus marmoreus fruit bodies

文献类型: 外文期刊

第一作者: Xing, Zengtao

作者: Xing, Zengtao;Wang, Yaosong;Feng, Zhiyong;Zhao, Zhihui;Liu, Xinghua

作者机构:

关键词: Co-60 irradiation;fruit body quality;Hypsizygus marmoreus;mushrooms;postharvest senescence;MUSHROOMS AGARICUS-BISPORUS;CHEMICAL-COMPOSITION;CULTIVATED MUSHROOM;SERINE PROTEINASE;STORAGE;ACCUMULATION;RESPIRATION;RADIATION;SUGARS

期刊名称:JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY ( 影响因子:5.279; 五年影响因子:5.269 )

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收录情况: SCI

摘要: Hypsizygus marmoreus fruit bodies were exposed to different doses of Co-60 gamma-irradiation, stored at 4 degrees C and 65-70% relative humidity, and various physiological changes associated with postharvest deterioration, as well as the activities of selected enzymes widely considered to play a role in the process of senescence, were monitored over a subsequent storage period of 25 days. Exposure to 0.8 kGy irradiation was clearly beneficial in maintaining the postharvest appearance of the mushroom sporophores compared to non-irradiated samples and fruit bodies exposed to higher doses (1.2-2.0 kGy) of irradiation. Samples treated with 0.8 kGy also exhibited smaller initial declines in soluble protein, smaller increases in reducing sugar content, and lower levels of malondialdehyde, accumulation during the early storage period. Smallest increases in proteinase activity were recorded in samples dosed with 0.8 and 2.0 kGy, and levels of superoxide dismutase were significantly higher in samples exposed to 0.8 kGy compared with non-irradiated controls. Large initial increases in catalase activity were detected in samples irradiated with 0.8, 1.2, and 1.6 kGy and, although enzyme levels gradually decreased in all samples during further storage, residual levels after 25 days were still severalfold higher in irradiated samples compared with controls. The data increase the current understanding of the effects of gamma-irradiation on the biochemical changes associated with postharvest senescence and should lead to more targeted strategies for reducing postharvest quality loss in H. marmoreus and other mushrooms.

分类号: S13

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