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Rhizospheric pore-water content predicts the biochar-attenuated accumulation, translocation, and toxicity of cadmium to lettuce.
Ecotoxicol Environ Saf. 2021 Jan 15; 208:111675.EE

Abstract

Metal bioavailability controls its behaviors in soil-plant system, especially involved in biochar amendment. This study compared a rhizospheric pore-water extraction against a BCR sequential extraction method to understand cadmium (Cd) bioavailability in two typical Chinese soils. Soils were spiked with five levels of Cd (CdCl2) and remediated with 3% corn-straw derived biochar. After 60 days of lettuce growth, Cd accumulation and enzyme activities in tissues were analyzed. Results showed that biochar increased soil properties (pH, CEC and SOM) compared to un-amended soils, but decreased contents of bioavailable Cd in soil pore-water (Cdpore-water) and BCR extracted Cd (CdFi+Fii). Contents of Cdpore-water were lower in yellow-brown soils than that in red soils. Pearson analysis showed that bioavailable Cd is negatively correlated with soil pH and CEC (p < 0.05). Cd accumulation in lettuce roots and leaves both were decreased by biochar addition, and the established linear equations proved that soil Cdpore-water is the best predictor for Cd accumulation in lettuce roots (r2 = 0.964) and in leaves (r2 = 0.953), followed by CdFi+Fii. Transfer factor (TF) values of Cd from roots to leaves were lower than 1, and slightly better correlated with soil Cdpore-water (r = -0.674, p < 0.01) than CdFi+Fii (r = -0.615, p < 0.01). Aggregated boosted tree (ABT) analyses indicated that soil properties together with Cdpore-water contribute more than 50% to root enzyme activities. Collectively, soil Cdpore-water is a promising predictor of Cd bioavailability, accumulation and toxicity in soil-plant system with biochar addition.

Authors+Show Affiliations

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, PR China.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, PR China.Nanjing Institute of Environmental Science, Ministry of Environmental Protection of China, Nanjing 210042, PR China. Electronic address: ming880609@126.com.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, PR China. Electronic address: yxy_hjy@hhu.edu.cn.USDA-ARS Southern Regional Research Center, 1100 Robert E. Lee Boulevard, New Orleans, LA 70124, United States.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, PR China.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, PR China.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, PR China.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, PR China.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, PR China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

33396007

Citation

Wang, Yi-Min, et al. "Rhizospheric Pore-water Content Predicts the Biochar-attenuated Accumulation, Translocation, and Toxicity of Cadmium to Lettuce." Ecotoxicology and Environmental Safety, vol. 208, 2021, p. 111675.
Wang YM, Liu Q, Li M, et al. Rhizospheric pore-water content predicts the biochar-attenuated accumulation, translocation, and toxicity of cadmium to lettuce. Ecotoxicol Environ Saf. 2021;208:111675.
Wang, Y. M., Liu, Q., Li, M., Yuan, X. Y., Uchimiya, M., Wang, S. W., Zhang, Z. Y., Ji, T., Wang, Y., & Zhao, Y. Y. (2021). Rhizospheric pore-water content predicts the biochar-attenuated accumulation, translocation, and toxicity of cadmium to lettuce. Ecotoxicology and Environmental Safety, 208, 111675. https://doi.org/10.1016/j.ecoenv.2020.111675
Wang YM, et al. Rhizospheric Pore-water Content Predicts the Biochar-attenuated Accumulation, Translocation, and Toxicity of Cadmium to Lettuce. Ecotoxicol Environ Saf. 2021 Jan 15;208:111675. PubMed PMID: 33396007.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Rhizospheric pore-water content predicts the biochar-attenuated accumulation, translocation, and toxicity of cadmium to lettuce. AU - Wang,Yi-Min, AU - Liu,Qing, AU - Li,Ming, AU - Yuan,Xu-Yin, AU - Uchimiya,Minori, AU - Wang,Shao-Wei, AU - Zhang,Zhi-Yuan, AU - Ji,Tao, AU - Wang,Ying, AU - Zhao,Yu-Yan, Y1 - 2020/12/07/ PY - 2020/08/21/received PY - 2020/10/25/revised PY - 2020/11/15/accepted PY - 2021/1/5/entrez PY - 2021/1/6/pubmed PY - 2021/1/30/medline KW - Antioxidant enzyme KW - Bioavailability KW - Biochar KW - Heavy metal KW - Soil pore-water SP - 111675 EP - 111675 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 208 N2 - Metal bioavailability controls its behaviors in soil-plant system, especially involved in biochar amendment. This study compared a rhizospheric pore-water extraction against a BCR sequential extraction method to understand cadmium (Cd) bioavailability in two typical Chinese soils. Soils were spiked with five levels of Cd (CdCl2) and remediated with 3% corn-straw derived biochar. After 60 days of lettuce growth, Cd accumulation and enzyme activities in tissues were analyzed. Results showed that biochar increased soil properties (pH, CEC and SOM) compared to un-amended soils, but decreased contents of bioavailable Cd in soil pore-water (Cdpore-water) and BCR extracted Cd (CdFi+Fii). Contents of Cdpore-water were lower in yellow-brown soils than that in red soils. Pearson analysis showed that bioavailable Cd is negatively correlated with soil pH and CEC (p < 0.05). Cd accumulation in lettuce roots and leaves both were decreased by biochar addition, and the established linear equations proved that soil Cdpore-water is the best predictor for Cd accumulation in lettuce roots (r2 = 0.964) and in leaves (r2 = 0.953), followed by CdFi+Fii. Transfer factor (TF) values of Cd from roots to leaves were lower than 1, and slightly better correlated with soil Cdpore-water (r = -0.674, p < 0.01) than CdFi+Fii (r = -0.615, p < 0.01). Aggregated boosted tree (ABT) analyses indicated that soil properties together with Cdpore-water contribute more than 50% to root enzyme activities. Collectively, soil Cdpore-water is a promising predictor of Cd bioavailability, accumulation and toxicity in soil-plant system with biochar addition. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/33396007/Rhizospheric_pore_water_content_predicts_the_biochar_attenuated_accumulation_translocation_and_toxicity_of_cadmium_to_lettuce_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0147-6513(20)31512-8 DB - PRIME DP - Unbound Medicine ER -