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Effects of Exogenous Salicylic Acid on theAntioxidative System in Bean SeedlingTreated with Manganese

机译:外源水杨酸对锰处理大豆幼苗抗氧化系统的影响。

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In the present study we investigated the role of salicylic acid (SA) in regulating Mn-induced oxidative stress in bean (Phaseolus vulgaris) leaves. Exposure of plants to 100 μM Mn inhibited biomass production and intensively increased Mn accumulation in leaves. Concomitantly, Mn significantly enhanced protein carbonyl, H2O2 content and lipid peroxidation as indicated by malondialdehyde (MDA) accumulation. SA (10, 50 and 100 μM) pretreatment alleviated the negative effect of Mn on plan growth and led to decrease in oxidative stress induced by Mn stress. Furthermore, SA enhanced the activities of catalase (CAT, EC 1.11.1.6), ascorbate peroxidase (APX, EC 1.11.1.11), but lowered that of superoxide dismutase (SOD, EC 1.15.1.1) and guaiacol peroxidase (POD, EC 1.11.1.7). The data suggest that the beneficial effect of SA could be related to avoidance of oxidative damage upon exposure to Mn thus reducing the negative consequences of oxidative stress caused by Mn toxicity.
机译:在本研究中,我们调查了水杨酸(SA)在调节Mn(菜豆)叶片中Mn诱导的氧化应激中的作用。植物暴露于100μM的Mn会抑制生物量的产生并强烈增加叶片中Mn的积累同时,如丙二醛(MDA)积累所示,Mn显着增强了蛋白质羰基,H2O2含量和脂质过氧化作用。 SA(10、50和100μM)预处理减轻了Mn对计划生长的负面影响,并降低了Mn应力引起的氧化应激。此外,SA增强了过氧化氢酶(CAT,EC 1.11.1.6),抗坏血酸过氧化物酶(APX,EC 1.11.1.11)的活性,但降低了过氧化物歧化酶(SOD,EC 1.15.1.1)和愈创木酚过氧化物酶(POD,EC 1.11)的活性。 .1.7)。数据表明,SA的有益作用可能与避免暴露于Mn时的氧化损伤有关,从而减少了由Mn毒性引起的氧化应激的负面影响。

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