Xie Zhichun, Fan Jinshuan, Charles Marie Thérèse, Charlebois Denis, Khanizadeh Shahrokh, Rolland Daniel, Roussel Dominique, Zhang Zhimin
College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China; Horticulture Research and Development Centre, Agriculture and Agri-Food Canada, Saint-Jean-sur-Richelieu, 430 Boulevard Gouin, QC J3B 3E6, Canada.
College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China.
Plant Physiol Biochem. 2016 Nov;108:337-343. doi: 10.1016/j.plaphy.2016.07.026. Epub 2016 Jul 29.
Postharvest ultraviolet-C (UV-C) hormesis has been shown effective for the treatment of the edible part of several horticultural crops such as strawberry fruit; however, there is a lack of information on its potential preharvest impact. In the present study three strawberry cultivars (Fragaria × ananassa Duch. 'Albion', 'Charlotte' and 'Seascape') were exposed to UV-C during two growth seasons for a period of three weeks. Treatment begins when the first flowers were wide open and fruits at commercial maturity were harvested within one week after UV treatment. The physicochemical quality parameters of the fruits harvested from the treated plants were compared to those of the fruits of the untreated control plants. Preharvest UV-C treatment tended to increase fruit firmness in all cultivars with significant differences declared only for 'Albion' and 'Seascape' in season 2. Fruits from treated plants were generally redder but a significant difference was observed only for cultivar 'Charlotte' in the second growing season. Other color attributes were not affected by UV-C, neither were organic acids, simple sugars, soluble solids content (SSC), titratable acidity (TA) and pH, although in most cases slight decreases were noticed. Cultivar and growing season were the factors that mostly influenced on the parameters under study. The present study show that cumulative preharvest UV-C treatment of 3.6 kJ m did not adversely affected important strawberry quality parameters.
采后紫外线-C（UV-C）刺激已被证明对草莓果实等几种园艺作物可食部分的处理有效；然而，关于其潜在的采前影响的信息却很少。在本研究中，三个草莓品种（弗吉尼亚草莓×凤梨草莓Duch.‘阿尔比恩’、‘夏洛特’和‘海景’）在两个生长季节中接受了为期三周的UV-C照射。处理从第一朵花完全开放时开始，UV处理后一周内收获达到商业成熟度的果实。将处理过的植株上收获的果实的理化品质参数与未处理的对照植株的果实进行比较。采前UV-C处理往往会增加所有品种果实的硬度，仅在第二季的‘阿尔比恩’和‘海景’品种中观察到显著差异。处理过的植株上的果实通常更红，但仅在第二个生长季节的‘夏洛特’品种中观察到显著差异。其他颜色属性不受UV-C影响，有机酸、单糖、可溶性固形物含量（SSC）、可滴定酸度（TA）和pH值也不受影响，尽管在大多数情况下有轻微下降。品种和生长季节是对所研究参数影响最大的因素。本研究表明，3.6 kJ m的累积采前UV-C处理不会对重要的草莓品质参数产生不利影响。
