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Effects of Cd-resistant bacteria and calcium carbonate + sepiolite on Cd availability in contaminated paddy soil and on Cd accumulation in brown rice grains.
Ecotoxicol Environ Saf. 2020 Jun 01; 195:110492.EE

Abstract

A pot experiment was conducted to evaluate the effects of combined application of cadmium (Cd)-resistant bacteria (J) and calcium carbonate + sepiolite (G) on both Cd bioavailability in contaminated paddy soil and on Cd accumulation in rice plants. Adding the mixture (J + G) to the soils significantly increased soil pH, decreased extractable Cd contents, and increased Fe/Mn-oxide Cd and organic-bound Cd contents. The applying of J + G, J and G decreased Cd contents in various rice tissues (roots, stems and leaves, husks, and brown rice grains) to different degrees. Compared with those of the CK, Cd contents decreased by 17.8%-53.3% in the roots, 12.3%-27.4% in the stems and leaves, 25.4%-44.6% in the husks, and 28.8%-55.7% in the brown rice grains for the application of J + G; Cd contents decreased by 8.2%-28.5% in the roots, 11.5%-32.0% in the husks, and 27.8%-45.9% in the brown rice grains for the application of J; Cd contents decreased by 12.9%-26.5% in the roots, in the stems and leaves decreased by 4.6%-34.1% in the stems and leaves, 60.2%-79.7% in the husks, and 35.7%-47.6% in the brown rice grains for the application of G. The alone application of bacteria (J) could reduce the bioavailability of Cd in soil and the contents of Cd in brown rice grains to some extent. Moreover, when the bacteria were applied in combination with mineral (J + G), it was a more effective method than the alone application of J or G to reduce the soil Cd bioavailability. Under all the tested conditions, applications of J4+G4 (320 mL kg-1 of J + 8 g kg-1 of G) resulted in the greatest reduction in Cd contents in brown rice grains. Overall, the results indicated that the combination of Cd-resistant bacteria and mineral material could effectively reduce Cd bioavailability in paddy soils and inhibit Cd accumulation in brown rice grains.

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Authors+Show Affiliations

Li Q
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China.
Zhang P
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China. Electronic address: zhyp2008@163.com.
Zhou H
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China.
Peng PQ
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China.
Zhang K
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China.
Mei JX
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China.
Li J
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China.
Liao BH
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China.

MeSH

Adaptation, PhysiologicalBacillus cereusBiological AvailabilityCadmiumCalcium CarbonateEdible GrainMagnesium SilicatesOryzaPlant LeavesPlant RootsSoilSoil Pollutants

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32203777

Citation

Li, Qian, et al. "Effects of Cd-resistant Bacteria and Calcium Carbonate + Sepiolite On Cd Availability in Contaminated Paddy Soil and On Cd Accumulation in Brown Rice Grains." Ecotoxicology and Environmental Safety, vol. 195, 2020, p. 110492.
Li Q, Zhang P, Zhou H, et al. Effects of Cd-resistant bacteria and calcium carbonate + sepiolite on Cd availability in contaminated paddy soil and on Cd accumulation in brown rice grains. Ecotoxicol Environ Saf. 2020;195:110492.
Li, Q., Zhang, P., Zhou, H., Peng, P. Q., Zhang, K., Mei, J. X., Li, J., & Liao, B. H. (2020). Effects of Cd-resistant bacteria and calcium carbonate + sepiolite on Cd availability in contaminated paddy soil and on Cd accumulation in brown rice grains. Ecotoxicology and Environmental Safety, 195, 110492. https://doi.org/10.1016/j.ecoenv.2020.110492
Li Q, et al. Effects of Cd-resistant Bacteria and Calcium Carbonate + Sepiolite On Cd Availability in Contaminated Paddy Soil and On Cd Accumulation in Brown Rice Grains. Ecotoxicol Environ Saf. 2020 Jun 1;195:110492. PubMed PMID: 32203777.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of Cd-resistant bacteria and calcium carbonate + sepiolite on Cd availability in contaminated paddy soil and on Cd accumulation in brown rice grains. AU - Li,Qian, AU - Zhang,Ping, AU - Zhou,Hang, AU - Peng,Pei-Qin, AU - Zhang,Ke, AU - Mei,Jin-Xing, AU - Li,Jing, AU - Liao,Bo-Han, Y1 - 2020/03/20/ PY - 2019/10/30/received PY - 2020/02/14/revised PY - 2020/03/15/accepted PY - 2020/3/24/pubmed PY - 2020/7/1/medline PY - 2020/3/24/entrez KW - Bioavailability KW - Cd-contaminated paddy soil KW - Cd-resistant bacteria KW - Mineral material KW - Rice SP - 110492 EP - 110492 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 195 N2 - A pot experiment was conducted to evaluate the effects of combined application of cadmium (Cd)-resistant bacteria (J) and calcium carbonate + sepiolite (G) on both Cd bioavailability in contaminated paddy soil and on Cd accumulation in rice plants. Adding the mixture (J + G) to the soils significantly increased soil pH, decreased extractable Cd contents, and increased Fe/Mn-oxide Cd and organic-bound Cd contents. The applying of J + G, J and G decreased Cd contents in various rice tissues (roots, stems and leaves, husks, and brown rice grains) to different degrees. Compared with those of the CK, Cd contents decreased by 17.8%-53.3% in the roots, 12.3%-27.4% in the stems and leaves, 25.4%-44.6% in the husks, and 28.8%-55.7% in the brown rice grains for the application of J + G; Cd contents decreased by 8.2%-28.5% in the roots, 11.5%-32.0% in the husks, and 27.8%-45.9% in the brown rice grains for the application of J; Cd contents decreased by 12.9%-26.5% in the roots, in the stems and leaves decreased by 4.6%-34.1% in the stems and leaves, 60.2%-79.7% in the husks, and 35.7%-47.6% in the brown rice grains for the application of G. The alone application of bacteria (J) could reduce the bioavailability of Cd in soil and the contents of Cd in brown rice grains to some extent. Moreover, when the bacteria were applied in combination with mineral (J + G), it was a more effective method than the alone application of J or G to reduce the soil Cd bioavailability. Under all the tested conditions, applications of J4+G4 (320 mL kg-1 of J + 8 g kg-1 of G) resulted in the greatest reduction in Cd contents in brown rice grains. Overall, the results indicated that the combination of Cd-resistant bacteria and mineral material could effectively reduce Cd bioavailability in paddy soils and inhibit Cd accumulation in brown rice grains. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/32203777/Effects_of_Cd_resistant_bacteria_and_calcium_carbonate_+_sepiolite_on_Cd_availability_in_contaminated_paddy_soil_and_on_Cd_accumulation_in_brown_rice_grains_ DB - PRIME DP - Unbound Medicine ER -