丁草胺和马拉硫磷对翅碱蓬生长及抗氧化酶系统的影响

发布时间：2018-04-02 22:12

本文选题：丁草胺　切入点：马拉硫磷　出处：《大连海洋大学学报》2016年05期

【摘要】：为探讨翅碱蓬Suaeda heteroptera对农药胁迫的反应,通过盆栽试验测定了不同浓度的农药(丁草胺、马拉硫磷)对翅碱蓬的发芽率、苗高、苗质量、体内超氧阴离子自由基、过氧化氢含量,以及对抗氧化酶(超氧化物歧化酶SOD、过氧化氢酶CAT、过氧化物酶POD)活性的影响。结果表明:在8 mg/kg以下浓度的丁草胺胁迫下,翅碱蓬生长与对照组相近,酶活性较稳定,膜脂过氧化程度低,对翅碱蓬伤害不大,在8 mg/kg及以上浓度的丁草胺胁迫下,翅碱蓬的生长和酶活性受到明显影响,丙二醛(MDA)含量上升,膜脂过氧化程度高,对翅碱蓬的伤害较大;在不同浓度的马拉硫磷胁迫下,翅碱蓬各项指标有明显的变化,但在试验所选浓度范围内,翅碱蓬有非常好的耐受性,能长时间地保持在一个相对稳定的水平抵御毒害,并维持较高发芽率和较强的生命力,从MDA含量和发芽率看,马拉硫磷对翅碱蓬有正面的影响。
[Abstract]:In order to investigate the response of Suaeda heteroptera to pesticide stress, the germination rate, seedling height, seedling quality, superoxide anion free radical and hydrogen peroxide content of different concentrations of pesticides (butachlor, malathion) on Suaeda salsa were determined by pot experiment.The activity of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) were also studied.The growth and enzyme activity of Suaeda salsa were obviously affected, the content of malondialdehyde (MDA) was increased, the degree of membrane lipid peroxidation was high, the damage to Suaeda salsa was greater, and the indexes of Suaeda salsa changed obviously under different concentrations of malathion stress.But in the selected concentration range, Suaeda salsa has very good tolerance, can maintain a relatively stable level to resist toxicity for a long time, and maintain a higher germination rate and strong vitality, in terms of MDA content and germination rate.Malathion has a positive effect on Suaeda salsa.
【作者单位】：大连海洋大学海洋科技与环境学院辽宁省高校近岸海洋环境科学与技术重点实验室;
【基金】：辽宁省自然科学基金资助项目(2015020616) 国家自然科学基金资助项目(41171389)
【分类号】：X592;X173

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