Effects of EDTANa 2 Fe on phytoavailability of cadmium and arsenic to rice (Oryza sativa L.).

Autor: Zhang X; Key Laboratory for Agro-ecological Processes in Subtropical Regions, Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; School of Geography Sciences, Hunan Normal University, Changsha 410081, China., Shuai H; School of Geography Sciences, Hunan Normal University, Changsha 410081, China., Xu C; Key Laboratory for Agro-ecological Processes in Subtropical Regions, Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China. Electronic address: xuchao1388@126.com., Wang Z; Key Laboratory for Agro-ecological Processes in Subtropical Regions, Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China., Zheng S; Key Laboratory for Agro-ecological Processes in Subtropical Regions, Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China., Zhu H; Key Laboratory for Agro-ecological Processes in Subtropical Regions, Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China., Huang D; Key Laboratory for Agro-ecological Processes in Subtropical Regions, Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China. Electronic address: dyhuang@isa.ac.cn., Zhang Q; Key Laboratory for Agro-ecological Processes in Subtropical Regions, Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China., Zhu Q; Key Laboratory for Agro-ecological Processes in Subtropical Regions, Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China.
Jazyk: angličtina
Zdroj: Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2024 Dec; Vol. 288, pp. 117409. Date of Electronic Publication: 2024 Nov 26.
DOI: 10.1016/j.ecoenv.2024.117409
Abstrakt: Cadmium (Cd) and arsenic (As) that accumulate in rice grains can enter the human body via ingestion, posing a human health threat. Chelated iron (Fe) fertilizer application is an effective strategy for reducing Cd and As concentrations in grains; however, its mechanism of action is unknown. We investigated effects of ethylenediamine tetraacetic acid disodium ferrous (EDTA·Na 2 Fe) at Fe application rates of 0, 25, 50, and 75 mg kg -1 on Cd and As availability in soil and accumulation in rice grains. EDTA·Na 2 Fe significantly reduced soil CdAs availability and significantly decreased CaCl 2 Cd and KH 2 PO 4 As concentrations by 27.8-39.2 % and 17.7-28.4 %, respectively. EDTA·Na 2 Fe facilitated Fe plaque (IP) formation and increased Cd (Cd IP ) and As (As IP ) sequestration in IP; furthermore, Fe IP , Cd IP , and As IP increased significantly by 70.7-125 %, 109-150 %, and 88.1-168 %, respectively. In roots, EDTA·Na 2 Fe reduced the Cd concentration (Cd R ) but increased the As concentration (As R ). EDTA·Na 2 Fe reduced the Cd (Cd G ) and As (As G ) concentrations in grains by 29.8-46.2 % and 18.5-33.3 %, respectively. The optimal simultaneous reduction effect of Cd G and As G was observed at an EDTA·Na 2 Fe application rate of 50 mg kg -1 Fe. The results indicated that Cd G was mainly affected by Cd availability, translocation factor (TF) Cd R /Cd IP , and TF Cd G /Cd R , and As G was mainly affected by TF As G /As R , followed by TF As R /As IP and As IP . In summary, EDTA·Na 2 Fe reduced Cd G and As G by reducing Cd and As availability in soil, improving Cd and As sequestration in IP, and reducing Cd transport from IP to roots and As transport from roots to grain. Moderate application of EDTA·Na 2 Fe effectively reduced Cd G and As G in CdAs-contaminated paddy soil.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: