Steindal Anne Linn Hykkerud, Rødven Rolf, Hansen Espen, Mølmann Jørgen
Norwegian Institute for Agricultural and Environmental Research, Bioforsk Nord Holt, Box 2284, NO-9269 Tromsø, Norway.
Norwegian Institute for Agricultural and Environmental Research, Bioforsk Nord Holt, Box 2284, NO-9269 Tromsø, Norway.
Food Chem. 2015 May 1;174:44-51. doi: 10.1016/j.foodchem.2014.10.129. Epub 2014 Oct 30.
Curly kale is a robust, cold tolerant plant with a high content of health-promoting compounds, grown at a range of latitudes. To assess the effects of temperature, photoperiod and cold acclimatisation on levels of glucosinolates, fatty acids and soluble sugars in kale, an experiment was set up under controlled conditions. Treatments consisted of combinations of the temperatures 15/9 or 21/15 °C, and photoperiods of 12 or 24h, followed by a cold acclimatisation period. Levels of glucosinolates and fatty acid types in leaves were affected by growth conditions and cold acclimatisation, being generally highest before acclimatisation. The effects of growth temperature and photoperiod on freezing tolerance were most pronounced in plants grown without cold acclimatisation. The results indicate that cold acclimatisation can increase the content of soluble sugar and can thereby improve the taste, whilst the content of unsaturated fatty and glucosinolates acids may decrease.
皱叶甘蓝是一种生命力顽强、耐寒的植物，富含促进健康的化合物，能在多种纬度地区种植。为评估温度、光周期和冷驯化对甘蓝中硫代葡萄糖苷、脂肪酸和可溶性糖含量的影响，在可控条件下开展了一项实验。处理方式包括15/9或21/15°C的温度组合以及12或24小时的光周期，随后是冷驯化期。叶片中硫代葡萄糖苷和脂肪酸类型的含量受生长条件和冷驯化影响，通常在驯化前最高。生长温度和光周期对耐寒性的影响在未进行冷驯化的植株中最为明显。结果表明，冷驯化可增加可溶性糖含量，从而改善口感，而不饱和脂肪酸和硫代葡萄糖苷的含量可能会降低。
