Nanoplastics and cadmium are common pollutants in agricultural systems,posing significant risks to rice.This study explored the effectiveness of biochar biofilters derived from invasive plant Mikania micrantha in miti...Nanoplastics and cadmium are common pollutants in agricultural systems,posing significant risks to rice.This study explored the effectiveness of biochar biofilters derived from invasive plant Mikania micrantha in mitigating the combined toxicity of polystyrene nanoplastics and cadmium on rice.The combined toxic effects of cadmium and polystyrene nanoplastics were more severe than their individual impacts.Polystyrene nanoplastics under cadmium stress adversely affected rice growth,reducing biomass by 16.46%,whereas the invasive plant Mikania micrantha biochar biofilters significantly improved biomass by 84.60%and 52.59%when applied alone or together with polystyrene nanoplastics under cadmium stress,respectively.Additionally,total chlorophyll content improved by 82.09%in the MBC treatment and by 36.66%in the MBC+PS NPs treatment compared to sole cadmium stress conditions.The invasive plant Mikania micrantha biochar biofilters alleviated these stress effects by reducing the cadmium translocation to roots and shoots,restoring chlorophyll and carotenoid levels,proteins,carbohydrates,preserving cellular structures,and enhancing oxidative defence through gene modulation.Scanning electron microscopy revealed the polystyrene nanoplastics internalization in root cells,but biochar biofilters acted as a physical barrier,limiting their translocation.Furthermore,the invasive plant Mikania micrantha biochar biofilters improved rice performance under dual stress by regulating metabolic pathways,nutrients cycle,TCA cycles and nitrogen transport.In contrast,polystyrene nanoplastics disrupted ATP-binding transporters and hormone signalling,increasing cadmium absorption and intensifying toxicity,thereby impairing growth,root development,and photosynthesis.These findings underscore the potential of invasive plant Mikania micrantha biochar biofilters in mitigating the environmental impacts of cadmium and nanoplastics in agricultural systems.展开更多
Cadmium(Cd)contamination in the environment is widespread,making it crucial to reduce Cd accumulation in cereal crops like wheat.However,strategies that not only mitigate Cd pollution but also address other environmen...Cadmium(Cd)contamination in the environment is widespread,making it crucial to reduce Cd accumulation in cereal crops like wheat.However,strategies that not only mitigate Cd pollution but also address other environmental challenges,such as invasive species management,remain unclear.This study introduces an innovative approach combining molybdenum nanoparticles(Mo NPs,1μM)and biochar biofilters derived from the invasive plant Mikania micrantha(IPMM),targeting the biochemical and molecular responses of wheat under Cd stress(100μM).Our findings showed that this novel combination significantly improved wheat physiological characteristics,growth,root architecture,elemental profile,osmoregulation,carotenoid,chlorophyll,gas exchange,and photosynthetic efficiency.Remarkably,simultaneous supply of IPMM biochar biofilters and Mo NPs substantially modulated the Cd translocation,reducing its accumulation in root(30.54%)and shoot(53.59%).Additionally,this strategy not only preserved mesophyll cell structures and the membrane integrity,but also strengthened and activated the oxidative defense systems through the regulation of genetic expressions.This synergistic approach advances the Cd alleviating techniques and offers a sustainable solution for utilizing invasive plants as a potential resource.By addressing both heavy metal pollution and ecological challenges,it provides a promising solution for safer crop production in Cd-contaminated environments.展开更多
基金funded by Science and Technology Research Projects of Heyuan City(2023013)Heyuan Branch,Guangdong Laboratory for Lingnan Modern Agriculture Project(DT20220002)+1 种基金the Guangdong Basic and Applied Basic Research Foundation,China(2023A1515011565)National Natural Science Foundation of China(31971554).
文摘Nanoplastics and cadmium are common pollutants in agricultural systems,posing significant risks to rice.This study explored the effectiveness of biochar biofilters derived from invasive plant Mikania micrantha in mitigating the combined toxicity of polystyrene nanoplastics and cadmium on rice.The combined toxic effects of cadmium and polystyrene nanoplastics were more severe than their individual impacts.Polystyrene nanoplastics under cadmium stress adversely affected rice growth,reducing biomass by 16.46%,whereas the invasive plant Mikania micrantha biochar biofilters significantly improved biomass by 84.60%and 52.59%when applied alone or together with polystyrene nanoplastics under cadmium stress,respectively.Additionally,total chlorophyll content improved by 82.09%in the MBC treatment and by 36.66%in the MBC+PS NPs treatment compared to sole cadmium stress conditions.The invasive plant Mikania micrantha biochar biofilters alleviated these stress effects by reducing the cadmium translocation to roots and shoots,restoring chlorophyll and carotenoid levels,proteins,carbohydrates,preserving cellular structures,and enhancing oxidative defence through gene modulation.Scanning electron microscopy revealed the polystyrene nanoplastics internalization in root cells,but biochar biofilters acted as a physical barrier,limiting their translocation.Furthermore,the invasive plant Mikania micrantha biochar biofilters improved rice performance under dual stress by regulating metabolic pathways,nutrients cycle,TCA cycles and nitrogen transport.In contrast,polystyrene nanoplastics disrupted ATP-binding transporters and hormone signalling,increasing cadmium absorption and intensifying toxicity,thereby impairing growth,root development,and photosynthesis.These findings underscore the potential of invasive plant Mikania micrantha biochar biofilters in mitigating the environmental impacts of cadmium and nanoplastics in agricultural systems.
文摘Cadmium(Cd)contamination in the environment is widespread,making it crucial to reduce Cd accumulation in cereal crops like wheat.However,strategies that not only mitigate Cd pollution but also address other environmental challenges,such as invasive species management,remain unclear.This study introduces an innovative approach combining molybdenum nanoparticles(Mo NPs,1μM)and biochar biofilters derived from the invasive plant Mikania micrantha(IPMM),targeting the biochemical and molecular responses of wheat under Cd stress(100μM).Our findings showed that this novel combination significantly improved wheat physiological characteristics,growth,root architecture,elemental profile,osmoregulation,carotenoid,chlorophyll,gas exchange,and photosynthetic efficiency.Remarkably,simultaneous supply of IPMM biochar biofilters and Mo NPs substantially modulated the Cd translocation,reducing its accumulation in root(30.54%)and shoot(53.59%).Additionally,this strategy not only preserved mesophyll cell structures and the membrane integrity,but also strengthened and activated the oxidative defense systems through the regulation of genetic expressions.This synergistic approach advances the Cd alleviating techniques and offers a sustainable solution for utilizing invasive plants as a potential resource.By addressing both heavy metal pollution and ecological challenges,it provides a promising solution for safer crop production in Cd-contaminated environments.
