Accumulation, transportation, and distribution of tetracycline and cadmium in rice  

作　　者：Chunfeng He Jini Zhou Chen Yang Zhiyi Song Junheng He Ziqing Huang Yurong Deng Jinling Wang Yu Xiong Zhi Dang 

机构地区：[1]College of Environment and Energy,South China University of Technology,Guangzhou 510006,China [2]The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education,Guangzhou 510006,China [3]Department of Environmental Sciences,The State University of New Jersey,Rutgers University,New Brunswick,NJ 08901,USA [4]Guangdong Institute of Ecological Environment and Soil,Guangzhou 510650,China

出　　处：《Journal of Environmental Sciences》2023年第4期58-69,共12页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.41773107);the Fundamental and Applied Basic Research Foundation of Guangdong Province,China (No.2020A1515011560);the Science and Technology Planning Project of Guangzhou,Guangdong Province,China(No.202002030297)。

摘　　要：Co-exposure to heavy metal and antibiotic pollution might result in complexation and synergistic interactions,affecting rice growth and further exacerbating pollutant enrichment.Therefore,our study sought to clarify the influence of different Tetracycline (TC) and Cadmium(Cd) concentration ratios (both alone and combined) on rice growth,pollutant accumulation,and transportation during the tillering stage in hydroponic system.Surprisingly,our findings indicated that the interaction between TC and Cd could alleviate the toxic effects of TC/Cd on aerial rice structures and decrease pollutant burdens during root elongation.In contrast,TC and Cd synergistically promoted the accumulation of TC/Cd in rice roots.However,their interaction increased the accumulation of TC in roots while decreasing the accumulation of Cd when the toxicant doses increased.The strong affinity of rice to Cd promoted its upward transport from the roots,whereas the toxic effects of TC reduced TC transport.Therefore,the combined toxicity of the two pollutants inhibited their upward transport.Additionally,a low concentration of TC promoted the accumulation of Cd in rice mainly in the root tip.Furthermore,a certain dose of TC promoted the upward migration of Cd from the root tip.Laser ablation-inductively coupled plasma mass spectrometry demonstrated that Cd mainly accumulated in the epidermis and stele of the root,whereas Fe mainly accumulated in the epidermis,which inhibited the absorption and accumulation of Cd by the rice roots through the generation of a Fe plaque.Our findings thus provide insights into the effects of TC and Cd co-exposure on rice growth.

关 键 词：Laser ablation-inductively coupled plasma mass spectrometry TETRACYCLINE CADMIUM ACCUMULATION DISTRIBUTION 

分 类 号：X173[环境科学与工程—环境科学]