Effect of Co-60 gamma irradiation on postharvest quality and selected enzyme activities of Volvariella volvacea

文献类型： 外文期刊

第一作者： Hou, Lijuan

作者： Hou, Lijuan;Lin, Jinsheng;Ma, Lin;Qu, Shaoxuan;Li, Huiping;Jiang, Ning

作者机构：

关键词： Fruit body quality; Postharvest senescence; Volvariella volvacea; Co-60 gamma irradiation

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

ISSN： 0304-4238

年卷期： 2018 年 235 卷

页码：

收录情况： SCI

摘要： Volvariella volvacea fruit bodies were exposed to six different dosage levels (0, 0.2, 0.4, 0.6, 0.8, and 1.0 kGy) of Co-60 gamma ray source, and then stored at 16 degrees C and 55-60% relative humidity for 7 d. Storage of the 0.8-kGy treatment group resulted in the highest sensory evaluation score, (increase by 51.85% than other treatments). The activity of selected enzymes involved in postharvest deterioration were also studied. The results showed that irradiation treatments have achieved significantly better commercial appearance after 7 d of storage due to slower postharvest mushroom softening, browning, weight loss (10.53%-34.73%) and respiration rate (17.20%-48.72%) than control. respectively.Samples irradiated with the 0.8-kGy dose performed better than other treatments. The control showed a significantly higher malonaldehyde (MDA) level than the irradiated samples (5.5%-45.27%). Increased catalase (CAT) activity (P < 0.05) was also observed in the samples receiving doses of 0.8 and 1.0 kGy after storage for 4 and 5 d, respectively. Superoxide (SOD) dismutase activities in the irradiated samples (13.68-40.53%) were significantly higher than those of the control, while the microbial populations decreased in all irradiated samples compared with the control. These findings suggested that irradiating V. volvacea mushrooms with 0.8 kGy of Co-60 gamma rays could maintain their quality.

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