Keutgen Anna J, Pawelzik Elke
Quality of Plant Products Section, Department of Crop Sciences, University of Göttingen, Carl-Sprengel-Weg-1, 37075 Göttingen, Germany.
J Agric Food Chem. 2007 May 16;55(10):4066-72. doi: 10.1021/jf070010k. Epub 2007 Apr 13.
The responses of fruit antioxidants in two strawberry cultivars differing in their sensitivity to NaCl stress were studied. The sensitive cv. Elsanta and the less sensitive cv. Korona were treated with NaCl solutions of 40 and 80 mmol/L in the nutrient solution. In general, moderate salinity resulted in increases of antioxidant capacity. In cv. Korona, salt stress increased the activity of superoxide dismutase and the contents of glutathione, phenols, and anthocyanins, while that of ascorbic acid decreased. In cv. Elsanta, changes of superoxid dismutase activity and of ascorbic acid concentration were comparable to those of cv. Korona, but the decrease of ascorbic acid was more distinct. The contents of anthocyanins decreased, and those of phenols remained similar. The glutathione content was reduced at the highest NaCl level. The results indicate that less salt-sensitive strawberry cultivars may be grown under moderate salinity stress to optimize fruit quality.
研究了两个对NaCl胁迫敏感性不同的草莓品种果实抗氧化剂的响应。敏感品种Elsanta和较不敏感品种Korona在营养液中用40和80 mmol/L的NaCl溶液处理。一般来说，中等盐度导致抗氧化能力增加。在Korona品种中，盐胁迫增加了超氧化物歧化酶的活性以及谷胱甘肽、酚类和花青素的含量，而抗坏血酸的含量则下降。在Elsanta品种中，超氧化物歧化酶活性和抗坏血酸浓度的变化与Korona品种相当，但抗坏血酸的下降更为明显。花青素含量下降，酚类含量保持相似。在最高NaCl水平下，谷胱甘肽含量降低。结果表明，对盐敏感性较低的草莓品种可以在中等盐度胁迫下种植，以优化果实品质。
