【摘要】 柚树苗经１００ｍｇ·Ｌ-１优康唑处理后，进行水分胁迫处理。优康唑处理能提高水分胁迫下叶片的水势和相对含水量，表明抗旱性提高。同时优康唑处理下，叶片超氧物歧化酶、抗坏血酸过氧化物酶活性和抗坏血酸，还原型谷胱甘肽和游离脯氨酸质量浓度均提高，而过氧化氢酶变化程度不大。实验结果表明，优康唑处理提高叶片对膜脂过氧化作用的防御能力可能是其提高柚树苗抗旱性的重要原因。更多还原

【Abstract】 Pomelo seedlings were foliar sprayed by 100 mg· L-1 uniconazole, and treated with water stress. The results showed that uniconazole treatment could improve leaf ψw and RWC under water stress, and dorought-resistance was enhanced. Uniconazole treatment could also promote leaf SOD, APX activities, AsA, GSH, free proline contents, but had no effect on CAT activity. It suggested that uniconazole treatment increased defensive capacity of membrane lipid peroxidation and stability of membrane, therefore resulted in the enhancement of drought resistance of pomelo seedlings.更多还原