数字农科院2.0

Carbon Nanomaterials Alter Plant Physiology A.nd Soil Bacterial Community C omposition In A Rice-Soil-Bacterial Ecosystem

文献类型： 外文期刊

作者： Hao, Y; Ma, CX; Zhang, ZT; Song, YH; Cao, WD; Guo, J; Zhou, GP; Rui, YK; Liu, LM; Xing, BS

作者机构：

关键词： Carbon nanomaterials; Rice; Phytohormones; Antioxidant enzymes; Soil bacterial community

期刊名称： ENVIRONMENTAL POLLUTION

ISSN： 0269-7491

年卷期： 2018 年 232 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： The aim of this study was to compare the toxicity effects of carbon nanomaterials (CNMs), namely fullerene (C-60), reduced graphene oxide (rGO) and multi-walled carbon nanotubes (MWCNTs), on a mini ecosystem of rice grown in a loamy potted soil. We measured plant physiological and biochemical parameters and examined bacterial community composition in the CNMs-treated plant soil system. After 30 days of exposure, all the three CNMs negatively affected the shoot height and root length of rice, significantly decreased root cortical cells diameter and resulted in shrinkage and deformation of cells, regardless of exposure doses (50 or 500 mg/kg). Additionally, at the high exposure dose of CNM, the concentrations of four phytohormones, including auxin, indoleacetic acid, brassinosteroid and gibberellin acid 4 in rice roots significantly increased as compared to the control. At the high exposure dose of MWCNTs and C-60, activities of the antioxidant enzymes superoxide dismutase (SOD) and peroxidase (POD) in roots increased significantly. High-throughput sequencing showed that three typical CNMs had little effect on shifting the predominant soil bacterial species, but the presence of CNMs significantly altered the composition of the bacterial community. Our results indicate that different CNMs indeed resulted in environmental toxicity to rice and soil bacterial community in the rhizosphere and suggest that CNMs themselves and their incorporated products should be reasonably used to control their release/discharge into the environment to prevent their toxic effects on living organisms and the potential risks to food safety. (C) 2017 Elsevier Ltd. All rights reserved.

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