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萘二甲酐减轻咪唑乙烟酸对高粱药害的解毒效果及解毒机理 被引量:4

Studies on the Alexipharmic Effect and Mechanism of 1,8-Naphthalic Anhydride Protecting Sorghum from Phytotoxicity of Imazethapyr
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摘要 [目的]探讨萘二甲酐减轻咪唑乙烟酸对高粱药害的解毒效果及解毒机理。[方法]以高粱为生测试材,采用模拟咪唑乙烟酸土壤残留的方法进行盆栽试验,研究安全剂萘二甲酐对咪唑乙烟酸土壤残留的解毒效果和解毒机理。[结果]在咪唑乙烟酸25 g a.i./hm2用量下,对高粱苗有较重药害,高粱苗的株高和鲜质量均明显低于不施药空白对照。萘二甲酐可以减轻咪唑乙烟酸对高粱的影响,表现为萘二甲酐+咪唑乙烟酸处理的高粱苗株高和鲜质量明显高于咪唑乙烟酸处理。萘二甲酐和咪唑乙烟酸都能导致高粱苗的氨基酸含量发生变化,可以认为氨基酸含量的变化是萘二甲酐对咪唑乙烟酸的解毒因素之一。萘二甲酐和咪唑乙烟酸对高粱苗中谷胱甘肽(GSH)含量和谷胱甘肽-S-转移酶(GSTs)活力均有不同程度的影响。萘二甲酐+咪唑乙烟酸处理后,高粱苗的GSH含量高于空白对照,低于咪唑乙烟酸处理;GSTs活力有明显提高。[结论]萘二甲酐可以减轻咪唑乙烟酸对高粱的药害;萘二甲酐减轻咪唑乙烟酸对高粱药害的解毒机理是使高粱植株体内某些氨基酸含量发生变化和激发高粱苗的GSTs活力。 [Aims] This investigation is to determine the alexipharmic effect and mechanism of 1,8-naphthalic anhydride (NA) protecting sorghum from phytotoxicity of imazethapyr. [Methods] The alexipharmic effect and mechanism of 1,8- naphthalic anhydride (NA) to the imazethapyr residue in soil was studied with simulated method, using potted sorghum as bioassay material. [Results] In this experiment the dosage of imazethapyr is 25 g a.i./ha. The results showed that imazethapyr could be an injury to sorghum seedlings. NA could reduce the injury effects of imazethapyr to sorghum. The height and fresh weight of sorghum seedling treated with NA + imazethapyr were obviously higher than those of imazethapyr treatments. NA and imazethapyr could induce the change of amino acid content in sorghum seedlings. This change can be considered as one of the factors of NA detoxification of imazethapyr. NA and imazethapyr affect the content of glutathione (GSH) and the activity of glutathione-S-transferase (GSTs) differently in sorghum seedlings. GSH content and GSTs activity obviously increased in sorghum seedlings. [Conclusions] It indicated that NA can reduce the injury of imazethapyr to sorghum and the alexipharmic mechanism of NA reducing the phytotoxicity of imazethapyr to sorghum was the chane of some amino acid content and the increase of GSTs activity.
出处 《农药》 CAS CSCD 北大核心 2013年第10期750-752,755,共4页 Agrochemicals
基金 黑龙江省自然科学基金资助项目(C0315)
关键词 萘二甲酐 咪唑乙烟酸 高粱 解毒效果和机理 1,8-naphthalic anhydride(NA) imazethapyr sorghum alexipharmic effect and mechanism
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