金属氧化物纳米材料(metal oxide nanomaterials,MONMs)在生产生活中广泛应用,可通过各种途径进入到土壤中,对土壤生物(特别是植物)和人类健康造成威胁.根系分泌物(root exudates,REs)作为植物与外界进行物质交流的媒介,能够与MONMs发生相互作用而影响其生物毒性,这对于评估土壤中MONMs生态健康风险具有重要的意义.本文综述了土壤中MONMs的来源,并总结了REs与MONMs界面相互作用;着重介绍了 REs介导下MONMs的植物毒性及其环境影响因素,并对未来的研究趋势进行展望.本综述可对MONMs的生态健康风险及其在环境中的潜在应用提供理论依据.
Metal oxide nanomaterials(MONMs)are widely used in production and life.MONMs can enter the soil environment through various pathways,posing a threat to soil organisms(specially for plants)and human health.Root exudates(REs),as a medium for substance exchange between plants and the outside world,can interact with MONMs and then affect their biotoxicity,which plays a vital role in assessing the ecological health risk assessment of MONMs in soil.In this paper,we review the sources of MONMs in soil and summarize the interfacial interactions between REs and MONMs,highlighting the REs-mediated phytotoxicity of MONMs and the effects of environmental influencing factors,with the outlook on further future research trends.This review provides a theoretical basis for the ecological health risks and potential applications of MONMs in the environment.