首页> 外文期刊>Journal of Environmental Science and Health, Part B: Pesticides, Food Contaminants, and Agricultural Wastes >Glutathione peroxidases in Lolium multiflorum and Festuca arundinacea: Activity, susceptibility to herbicides and characteristics
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Glutathione peroxidases in Lolium multiflorum and Festuca arundinacea: Activity, susceptibility to herbicides and characteristics

机译:多花黑麦草和无花茅中谷胱甘肽过氧化物酶的活性,除草剂敏感性和特性

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摘要

To evidence a possible mechanism of defense toward oxidative stress induced by herbicides in plants, an investigation was carried on the activity of glutathione peroxidase (GPX) in Italian ryegrass (Lolium multiflorum) and in Festuca (Festuca arundinacea) in response to atrazine (6-chloro-N-ethyl-N′-isopropyl-1,3,5-triazine-2,4-diamine) and fluorodifen (4-nitrophenyl α,α,α-trifluoro-2-nitro-p-tolyl ether). In general, the herbicide treatments significantly induced GPX activity in the shoots of Italian ryegrass, whereas inhibited it in Festuca. These opposite behaviors are examined, taking into account the accumulation and persistence of the two herbicides in the plants, and they are discussed in terms of GPX counteraction to oxidative stress in the first case, and of a lower detoxification rate unable to prevent a deleterious effect on the GPX activity in the second case. Further information on the properties of Italian ryegrass and Festuca GPX were achieved by purification and isolation of the enzymes, performed by protein liquid chromatography and by electrophoretic analyses. GPX of both the plants were found to be heterodimer with multiple function in showing also glutathione S-transferase (GST) activity.
机译:为了证明抗除草剂诱导植物氧化应激的可能机制,针对阿特拉津(6-)对意大利黑麦草(Lolium multiflorum)和Festuca(Festuca arundinacea)中谷胱甘肽过氧化物酶(GPX)的活性进行了研究。氯-N-乙基-N-异丙基-1,3,5-三嗪-2,4-二胺)和氟二酚(4-硝基苯基α,α,α-三氟-2-硝基-对甲苯基醚)。通常,除草剂处理可显着诱导意大利黑麦草芽中的GPX活性,而在Festuca中可抑制GPX活性。考虑到两种除草剂在植物中的积累和持久性,研究了这些相反的行为,并在第一种情况下以GPX对氧化应激的抗衡作用以及较低的排毒率无法防止有害作用进行了讨论。关于第二种情况的GPX活动。有关意大利黑麦草和Festuca GPX的特性的更多信息是通过纯化和分离酶,通过蛋白质液相色谱和电泳分析获得的。发现两种植物的GPX均为异二聚体,具有多种功能,还显示出谷胱甘肽S-转移酶(GST)活性。

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