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首页> 外文期刊>Bulletin of Environmental Contamination and Toxicology >Effect of Graphene Oxide on Growth of Wheat Seedlings: Insights from Oxidative Stress and Physiological Flux
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Effect of Graphene Oxide on Growth of Wheat Seedlings: Insights from Oxidative Stress and Physiological Flux

机译:石墨烯氧化物对小麦幼苗生长的影响:氧化应激和生理通量见解

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摘要

In this study, the responses of wheat seedlings to graphene oxide (GO) were investigated at a wide concentration range of 0-1000 mg L-1, including oxidative stress, real-time membrane potential as well as proton and calcium ion fluxes. The results show that GO induced a hormesis effect on root growth (low concentration (100 mg L-1) promotion and high concentration (1000 mg L-1) inhibition. Oxidative stress was responsible for the growth inhibition at GO concentration of 1000 mg L-1, as suggested from great stimulation in the activities of antioxidant enzymes and MDA content in roots or leaves. Superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) activities were highly correlated with MDA levels (r(2) = 0.963, 0.984, and 0.960, respectively). GO exposure caused significant concentration-dependent membrane depolarization in roots, and significantly inhibited H+ efflux and extracellular Ca2+ influx in root cap.
机译:在该研究中,在0-1000mg L-1的宽浓度范围内研究小麦幼苗到石墨烯氧化物(GO)的反应,包括氧化应激,实时膜电位以及质子和钙离子通量。 结果表明,诱导对根生长的血流血效果(低浓度(100mg L-1)促进和高浓度(1000mg l-1)抑制。氧化胁迫对GO浓度的生长抑制浓度为1000 mg l负责 -1,如在根或叶中的抗氧化酶和MDA含量的活动中的大量刺激。超氧化物歧化酶(SOD),过氧化氢酶(猫),过氧化物酶(POD)活性与MDA水平高(R(2)= 0.963,0.984和0.960分别。曝光引起了根部的显着浓度依赖性膜去极化,并显着抑制了根帽中的H + Efflux和细胞外Ca2 +流入。

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