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辽宁省稻田野慈姑对苄嘧磺隆的抗药性

, PP. 663-668

Keywords: 野慈姑,苄嘧磺隆,乙酰乳酸合成酶,抗药性

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Abstract:

为明确辽宁省不同稻田区野慈姑对苄嘧磺隆的抗性水平,整株测定了辽宁省大石桥(种群R1)、海城(种群R2)、苏家屯(种群R3)和开原(种群R4)共4个水稻产区野慈姑对苄嘧磺隆的抗性水平,并离体测定了各种群叶片体内乙酰乳酸合成酶(ALS)对苄嘧磺隆的敏感性。结果显示,种群R1和R2的抗药性相对较高,抗性指数分别为76.99和49.94,种群R3和R4抗性相对较低,抗性指数分别为12.48和16.91;离体测定结果表明较高水平的ALS活性可能与是否产生抗药性无关,种群R1、R2、R3、R4的抗性指数分别为81.86、67.48、10.56、24.86;抗药性程度依次为R1>R2>R4>R3。表明4个水稻产区野慈姑对苄嘧磺隆均产生了抗药性,而其体内ALS活性降低可能是产生抗药性的原因之一。

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