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中文摘要：
研究了LaCl3对轮藻光合色素含量及抗氧化酶活性的影响,La3+浓度分别为0,0.2,1.0和5.0 μmol·L-1.结果表明:0.2和5.0 μmol·L-1La3+处理降低了轮藻叶绿素b的含量,5.0 μmol·L-1 La3+处理降低了叶绿素a+b的含量;类胡萝卜素含量在1.0 μmol·L-1 La3+处理组显著高于对照.随着La处理浓度的提高超氧化物歧化酶的活性逐渐升高,处理组谷胱苷肽过氧化物酶活性均显著高于对照,且在1.0 μmol·L-1La处理组达到最大值,0.2和5.0 μmol·L-1 La3+处理将抑制过氧化氢酶活性,其变化规律与叶绿素b相似.实验浓度的La3+处理可能引起了轮藻植株的氧化损伤,作为应激反应,GSH-Px酶活性及类胡萝卜素含量的升高在一定程度上缓解了氧化损伤.
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