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Outline
To investigate the effect of low voltage electrostatic field (LVEF) treatment on Alternaria rot in apricot fruit, 'Chuanzhihong' apricots were used as the experimental material. The fruits were wound-inoculated with Alternaria alternata and stored under a 1500 V LVEF environment at 25±1 ℃ and 80%~85% relative humidity. Physiological and biochemical parameters were measured to evaluate the inhibitory effect of LVEF treatment on Alternaria rot development during storage. The results demonstrated that LVEF treatment significantly inhibited the infection process of the pathogen. Compared to the control (CK) group, LVEF treatment reduced the disease incidence by 41.18% and the lesion diameter by 31.20% (day 6). In terms of oxidative stress, the contents of malondialdehyde (day 2) and hydrogen peroxide (day 6) were significantly lower in the LVEF group than in the CK group, decreasing by 29.41% and 19.75%, respectively. Additionally, the production rate of superoxide anion (day 6) was also decreased significantly, showing a reduction of 5.42%. Furthermore, LVEF treatment suppressed the activity of polyphenol oxidase while increased the content of reduced glutathione by 1.81% (day 4). Regarding antioxidant enzyme activity regulation, LVEF treatment significantly enhanced the activities of catalase and ascorbate peroxidase, while peroxidase and superoxide dismutase activities were also increased. In terms of disease resistance, the activities of phenylalanine ammonia lyase and chitinase significantly increased by 5.86% and 1.17% (day 6), respectively, while the contents of total phenols and flavonoids increased by 1.75% and 4.35% (day 6). In conclusion, LVEF preservation technology could effectively inhibit the disease occurrence of Alternaria rot and showed promising application potential for controlling postharvest diseases in apricot fruit.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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