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Manganese facilitates cadmium stabilization through physicochemical dynamics and amino acid accumulation in rice rhizosphere under flood-associated low pe+pH.
J Hazard Mater. 2021 08 15; 416:126079.JH

Abstract

Periodic flooding in paddy soils impacts redox behavior and induces variations in pe+pH levels. Manganese (Mn) is capable of reducing cadmium (Cd) uptake by rice. However, the processes involved in how Mn alters Cd mobilization under different pe+pH environments remain poorly understood. To investigate the mechanisms of Mn-mediated soil Cd-stabilization and subsequent inhibition of Cd uptake from flooded soils, we examined Cd immobilization in soil pot incubations, transcriptional changes in Cd-transport genes, and metabolomic analyses of roots and rhizosphere soils with or without Mn application. We found a decrease in extractable Cd concentration largely depended on irrigation-associated low pe+pH, exogenous Mn enhancement of Fe-Mn (oxyhydro)oxide-mediated Cd transformation, and Cd deposition in rice Fe/Mn plaques. Mn application led to striking effects on the expression of Cd-related genes eg. IRT, HMA, and NRAMP in rice root tissue. Exposure to Mn under variable pe+pH levels resulted in metabolic reprogramming of soil and rice roots. Mn induced amino acid synthesis in rice roots, leading to rhizosphere accumulation of free L-lysine, glycine, and glutamine, which can reportedly bind metal ions, forming complexes with Cd. Thus, secreted amino acids, low pe+pH, and free Mn can together comprise a multi-faceted approach to managing Cd toxicity in rice.

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Authors+Show Affiliations

Wang M
Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, PR China.
Wang L
Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, PR China.
Zhao S
Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, PR China.
Li S
Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, PR China.
Lei X
Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, PR China.
Qin L
Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, PR China.
Sun X
Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, PR China.
Chen S
Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, PR China. Electronic address: chenshibao@caas.cn.

MeSH

Amino AcidsCadmiumFloodsHydrogen-Ion ConcentrationManganeseOryzaOxidesRhizosphereSoilSoil Pollutants

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

34492898

Citation

Wang, Meng, et al. "Manganese Facilitates Cadmium Stabilization Through Physicochemical Dynamics and Amino Acid Accumulation in Rice Rhizosphere Under Flood-associated Low Pe+pH." Journal of Hazardous Materials, vol. 416, 2021, p. 126079.
Wang M, Wang L, Zhao S, et al. Manganese facilitates cadmium stabilization through physicochemical dynamics and amino acid accumulation in rice rhizosphere under flood-associated low pe+pH. J Hazard Mater. 2021;416:126079.
Wang, M., Wang, L., Zhao, S., Li, S., Lei, X., Qin, L., Sun, X., & Chen, S. (2021). Manganese facilitates cadmium stabilization through physicochemical dynamics and amino acid accumulation in rice rhizosphere under flood-associated low pe+pH. Journal of Hazardous Materials, 416, 126079. https://doi.org/10.1016/j.jhazmat.2021.126079
Wang M, et al. Manganese Facilitates Cadmium Stabilization Through Physicochemical Dynamics and Amino Acid Accumulation in Rice Rhizosphere Under Flood-associated Low Pe+pH. J Hazard Mater. 2021 08 15;416:126079. PubMed PMID: 34492898.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Manganese facilitates cadmium stabilization through physicochemical dynamics and amino acid accumulation in rice rhizosphere under flood-associated low pe+pH. AU - Wang,Meng, AU - Wang,Lifu, AU - Zhao,Shuwen, AU - Li,Shanshan, AU - Lei,Xiaoqin, AU - Qin,Luyao, AU - Sun,Xiaoyi, AU - Chen,Shibao, Y1 - 2021/05/14/ PY - 2021/02/10/received PY - 2021/05/03/revised PY - 2021/05/05/accepted PY - 2021/9/8/entrez PY - 2021/9/9/pubmed PY - 2021/9/21/medline KW - Amino acid secretion KW - Metabolic profiles KW - Paddy soil KW - Soil cadmium availability KW - Soil pe+pH variation SP - 126079 EP - 126079 JF - Journal of hazardous materials JO - J Hazard Mater VL - 416 N2 - Periodic flooding in paddy soils impacts redox behavior and induces variations in pe+pH levels. Manganese (Mn) is capable of reducing cadmium (Cd) uptake by rice. However, the processes involved in how Mn alters Cd mobilization under different pe+pH environments remain poorly understood. To investigate the mechanisms of Mn-mediated soil Cd-stabilization and subsequent inhibition of Cd uptake from flooded soils, we examined Cd immobilization in soil pot incubations, transcriptional changes in Cd-transport genes, and metabolomic analyses of roots and rhizosphere soils with or without Mn application. We found a decrease in extractable Cd concentration largely depended on irrigation-associated low pe+pH, exogenous Mn enhancement of Fe-Mn (oxyhydro)oxide-mediated Cd transformation, and Cd deposition in rice Fe/Mn plaques. Mn application led to striking effects on the expression of Cd-related genes eg. IRT, HMA, and NRAMP in rice root tissue. Exposure to Mn under variable pe+pH levels resulted in metabolic reprogramming of soil and rice roots. Mn induced amino acid synthesis in rice roots, leading to rhizosphere accumulation of free L-lysine, glycine, and glutamine, which can reportedly bind metal ions, forming complexes with Cd. Thus, secreted amino acids, low pe+pH, and free Mn can together comprise a multi-faceted approach to managing Cd toxicity in rice. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/34492898/Manganese_facilitates_cadmium_stabilization_through_physicochemical_dynamics_and_amino_acid_accumulation_in_rice_rhizosphere_under_flood_associated_low_pe+pH_ DB - PRIME DP - Unbound Medicine ER -