Effects of zeolite imidazole frameworks on rice seedlings (Oryza sativa L.): Phytotoxicity, transformation, and bioaccumulation  

作　　者：Chaofa Chen Yongqi Yao Chenghua Xing Yunyu Guo Luyi Cai Jianfang Yan Xi-Lin Wu Miaozhen Cai 

机构地区：[1]College of Geography and Environmental Science,Zhejiang Normal University,Jinhua,Zhejiang 321004,China [2]College of Agriculture,Jinhua Polytechnic,Jinhua,Zhejiang 321007,China

出　　处：《Journal of Environmental Sciences》2024年第10期15-25,共11页环境科学学报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.30800705 and 31101599);the Provincial Natural Science Foundation of Zhejiang(Nos.LY15C150004 and LY18C150007);the Key Research and Devel opment Projects of Social Development of Jinhua Science and Technology Program(No.2021C22750).

摘　　要：Zeolite imidazole frameworks(ZIFs),a class of the metal organic framework,have been extensively studied in environmental applications.However,their environmental fate and potential ecological impact on plants remain unknown.Here,we investigated the phytotoxicity,transformation,and bioaccumulation processes of two typical ZIFs(ZIF-8 and ZIF-67)in rice(Oryza sativa L.)under hydroponic conditions.ZIF-8 and ZIF-67 in the concentration of 50 mg/L decreased root and shoot dry weight maximally by 55.2%and 27.5%,53.5%and 37.5%,respectively.The scanning electron microscopy(SEM)imaging combined with X-ray diffraction(XRD)patterns revealed that ZIFs on the root surface gradually collapsed and transformed into nanosheets with increasing cultivation time.The fluorescein isothiocyanate(FITC)labeled ZIFs were applied to trace the uptake and translocation of ZIFs in rice.The results demonstrated that the transformed ZIFs were mainly distributed in the intercellular spaces of rice root,while they cannot be transported to culms and leaves.Even so,the Co and Zn contents of rice roots and shoots in the ZIFs treated groups were increased by 1145%and 1259%,145%and 259%,respectively,compared with the control groups.These findings suggested that the phytotoxicity of ZIFs are primarily attributed to the transformed ZIFs and to a less extent,the metal ions and their ligands,and they were internalized by rice root and increased the Co and Zn contents of shoots.This study reported the transformation of ZIFs and their biological effectiveness in rice,highlighting the potential environmental hazards and risks of ZIFs to crop plants.

关 键 词：Zeolitic imidazolate frameworks (ZIFs) Rice(Oryza sativa L.) PHYTOTOXICITY Transformed ZIFs ZIFs bioaccumulation 

分 类 号：S511[农业科学—作物学]