土壤含水量对辣椒果实抗氧化物质含量及酶活性的影响

研究了不同土壤含水量对辣椒果实抗氧化物质及酶活性的影响.结果表明,随着土壤相对含水量的逐渐下降,果实辣椒素、黄酮、自由酚、维生素C及类胡萝卜素含量呈逐渐增加趋势,当土壤相对含水量为20%时达到最高水平, 土壤含水量80%时为最低;叶绿素含量随着土壤含水量的下降而不断降低,其中土壤含水量为80%时含量最高,土壤含水量为20%时含量最低;SOD、POD、PAL、PPO的活性随着土壤干旱程度的加剧呈逐渐增加趋势.

Effect of Different Soil Water Content on the Antioxidant Content and Enzyme Activities in Hot Pepper Fruit

Effect of different soil water content on the antioxidant content and enzyme activities in hot pepper fruit were studied.The results showed:the content of capsaicin,flavonoids,phenolic acids, carotenoids,and vitamin C: were increased with soil water content decreasing,above substance content reach the highest level at soil water content of 20%, and the lowest level at soil water content of 80%;the chlorophyl content were decreased with soil water content falling,the highest level was achieved at soil water content of 80%,and lowest level at soil water content of 20%;the activities of superoxide dismutase,peroxidase,phenylalanine ammonia lyase and polyphenol oxidase were all promoted with soil water content decreasing.