Tags

Type your tag names separated by a space and hit enter

Temporal variability in trace metal solubility in a paddy soil not reflected in uptake by rice (Oryza sativa L.).
Environ Geochem Health. 2016 Dec; 38(6):1355-1372.EG

Abstract

Alternating flooding and drainage conditions have a strong influence on redox chemistry and the solubility of trace metals in paddy soils. However, current knowledge of how the effects of water management on trace metal solubility are linked to trace metal uptake by rice plants over time is still limited. Here, a field-contaminated paddy soil was subjected to two flooding and drainage cycles in a pot experiment with two rice plant cultivars, exhibiting either high or low Cd accumulation characteristics. Flooding led to a strong vertical gradient in the redox potential (Eh). The pH and Mn, Fe, and dissolved organic carbon concentrations increased with decreasing Eh and vice versa. During flooding, trace metal solubility decreased markedly, probably due to sulfide mineral precipitation. Despite its low solubility, the Cd content in rice grains exceeded the food quality standards for both cultivars. Trace metal contents in different rice plant tissues (roots, stem, and leaves) increased at a constant rate during the first flooding and drainage cycle but decreased after reaching a maximum during the second cycle. As such, the high temporal variability in trace metal solubility was not reflected in trace metal uptake by rice plants over time. This might be due to the presence of aerobic conditions and a consequent higher trace metal solubility near the root surface, even during flooding. Trace metal solubility in the rhizosphere should be considered when linking water management to trace metal uptake by rice over time.

Links

PMC Free PDF

Authors+Show Affiliations

Pan Y
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, People's Republic of China. Department of Soil Quality, Wageningen University, P.O. Box 47, 6700 AA, Wageningen, The Netherlands.
Koopmans GF
Department of Soil Quality, Wageningen University, P.O. Box 47, 6700 AA, Wageningen, The Netherlands. gerwin.koopmans@wur.nl.
Bonten LT
Alterra, P.O. Box 47, 6700 AA, Wageningen, The Netherlands.
Song J
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, People's Republic of China.
Luo Y
Yantai Institute of Costal Zone Research, Chinese Academy of Sciences, Yantai, 264003, People's Republic of China.
Temminghoff EJ
Department of Soil Quality, Wageningen University, P.O. Box 47, 6700 AA, Wageningen, The Netherlands.
Comans RN
Department of Soil Quality, Wageningen University, P.O. Box 47, 6700 AA, Wageningen, The Netherlands.

MeSH

CadmiumFood ContaminationOryzaOxidation-ReductionPlant LeavesPlant RootsRhizosphereSoilSoil PollutantsSolubilityTime Factors

Pub Type(s)

Journal Article

Language

eng

PubMed ID

26832131

Citation

Pan, Yunyu, et al. "Temporal Variability in Trace Metal Solubility in a Paddy Soil Not Reflected in Uptake By Rice (Oryza Sativa L.)." Environmental Geochemistry and Health, vol. 38, no. 6, 2016, pp. 1355-1372.
Pan Y, Koopmans GF, Bonten LT, et al. Temporal variability in trace metal solubility in a paddy soil not reflected in uptake by rice (Oryza sativa L.). Environ Geochem Health. 2016;38(6):1355-1372.
Pan, Y., Koopmans, G. F., Bonten, L. T., Song, J., Luo, Y., Temminghoff, E. J., & Comans, R. N. (2016). Temporal variability in trace metal solubility in a paddy soil not reflected in uptake by rice (Oryza sativa L.). Environmental Geochemistry and Health, 38(6), 1355-1372.
Pan Y, et al. Temporal Variability in Trace Metal Solubility in a Paddy Soil Not Reflected in Uptake By Rice (Oryza Sativa L.). Environ Geochem Health. 2016;38(6):1355-1372. PubMed PMID: 26832131.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Temporal variability in trace metal solubility in a paddy soil not reflected in uptake by rice (Oryza sativa L.). AU - Pan,Yunyu, AU - Koopmans,Gerwin F, AU - Bonten,Luc T C, AU - Song,Jing, AU - Luo,Yongming, AU - Temminghoff,Erwin J M, AU - Comans,Rob N J, Y1 - 2016/01/30/ PY - 2015/10/16/received PY - 2016/01/20/accepted PY - 2016/11/5/pubmed PY - 2017/1/24/medline PY - 2016/2/3/entrez KW - Bioavailability KW - Paddy soils KW - Redox potential KW - Trace metal contamination KW - Uptake KW - Water management SP - 1355 EP - 1372 JF - Environmental geochemistry and health JO - Environ Geochem Health VL - 38 IS - 6 N2 - Alternating flooding and drainage conditions have a strong influence on redox chemistry and the solubility of trace metals in paddy soils. However, current knowledge of how the effects of water management on trace metal solubility are linked to trace metal uptake by rice plants over time is still limited. Here, a field-contaminated paddy soil was subjected to two flooding and drainage cycles in a pot experiment with two rice plant cultivars, exhibiting either high or low Cd accumulation characteristics. Flooding led to a strong vertical gradient in the redox potential (Eh). The pH and Mn, Fe, and dissolved organic carbon concentrations increased with decreasing Eh and vice versa. During flooding, trace metal solubility decreased markedly, probably due to sulfide mineral precipitation. Despite its low solubility, the Cd content in rice grains exceeded the food quality standards for both cultivars. Trace metal contents in different rice plant tissues (roots, stem, and leaves) increased at a constant rate during the first flooding and drainage cycle but decreased after reaching a maximum during the second cycle. As such, the high temporal variability in trace metal solubility was not reflected in trace metal uptake by rice plants over time. This might be due to the presence of aerobic conditions and a consequent higher trace metal solubility near the root surface, even during flooding. Trace metal solubility in the rhizosphere should be considered when linking water management to trace metal uptake by rice over time. SN - 1573-2983 UR - https://www.unboundmedicine.com/medline/citation/26832131/Temporal_variability_in_trace_metal_solubility_in_a_paddy_soil_not_reflected_in_uptake_by_rice__Oryza_sativa_L___ DB - PRIME DP - Unbound Medicine ER -