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首页> 外文期刊>Environmental toxicology and chemistry >SILVER NANOPARTICLE TOXICITY EFFECT ON GROWTH AND CELLULAR VIABILITY OF THE AQUATIC PLANT LEMNA GIBBA
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SILVER NANOPARTICLE TOXICITY EFFECT ON GROWTH AND CELLULAR VIABILITY OF THE AQUATIC PLANT LEMNA GIBBA

机译：银纳米颗粒毒性对水生植物莱姆纳·吉巴（Lemna Gibba）生长和细胞活力的影响

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Abstract-The toxicity effect of silver nanoparticles (AgNPs) on growth and cellular viability was investigated on the aquatic plant Lemna gibba exposed over 7 d to 0,0.01,0.1,1, and 10 mg/L of AgNPs. Growth inhibition was demonstrated by a significant decrease of frond numbers dependent on AgNP concentration. Under these conditions, reduction in plant cellular viability was detected for 0.1, 1, and 10 mg/L of AgNPs within 7 d of AgNPs treatment. This effect was highly correlated with the production of intracellular reactive oxygen species (ROS). A significant increase of intracellular ROS formation was triggered by 1 and 10 mg/L of AgNP exposure. The induced oxidative stress was related to Ag accumulation within L. gibba plant cells and with the increasing concentration of AgNP exposure in the medium. The authors' results clearly suggested that AgNP suspension represented a potential source of toxicity for L gibba plant cells. Due to the low release capacity of free soluble Ag from AgNP dissolution in the medium, it is most likely that the intracellular uptake of Ag was directly from AgNPs, triggering cellular oxidative stress that may be due to the release of free Ag inside plant cells. Therefore, the present study demonstrated that AgNP accumulation in an aquatic environment may represent a potential source of toxicity and a risk for the viability of duckweeds.
机译：摘要-研究了水生植物Lemna gibba在7 d暴露于0,0.01,0.1,1和10 mg / L AgNPs后，银纳米颗粒（AgNPs）对生长和细胞活力的毒性作用。通过抑制依赖于AgNP浓度的叶状体数目的显着减少来证明生长抑制。在这些条件下，在处理7天内，检测到0.1、1和10 mg / L AgNP的植物细胞活力降低。这种作用与细胞内活性氧（ROS）的产生高度相关。 1和10 mg / L的AgNP暴露触发了细胞内ROS形成的显着增加。诱导的氧化应激与吉布氏杆菌植物细胞内的Ag积累以及培养基中AgNP暴露浓度的增加有关。作者的结果清楚地表明，AgNP悬浮液代表了对L gibba植物细胞的潜在毒性来源。由于游离可溶性Ag从培养基中溶解于AgNP的释放能力低，最有可能直接从AgNPs吸收细胞内的Ag，从而触发细胞氧化应激，这可能是由于游离Ag在植物细胞内部的释放所致。因此，本研究表明，AgNP在水生环境中的积累可能代表了潜在的毒性来源和浮萍的生存风险。

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