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Effects of pH, Fe, and Cd on the uptake of Fe(2+) and Cd (2+) by rice.
Environ Sci Pollut Res Int. 2013 Dec; 20(12):8947-54.ES

Abstract

The rhizosphere plays an important role in altering cadmium (Cd) solubility in paddy soils and Cd accumulation in rice. However, more studies are needed to elucidate the mechanism controlling rice Cd solubility and bioavailability under different rhizosphere conditions to explain the discrepancy of previous studies. A rice culture with nutrient solution and vermiculite was conducted to assess the effects of pH, Eh, and iron (Fe) concentration on Cd, Fe fractions on the vermiculite/root surface and their uptake by rice. The solution pH was set from 4.5 to 7.5, with additions of Fe (30 and 50 mg L(-1)) and Cd (0.5 and 0.9 mg L(-1)). At pH 5.5, the Eh in the rice rhizosphere was higher whereas transpiration, Cd(2+), and Fe(2+) adsorption on the vermiculite/root surface and accumulation in rice were lower than the other pH treatments. Cadmium addition had no impact on pH and Eh in rice rhizosphere while Fe addition decreased pH and increased Eh significantly. Compared with control, Fe addition resulted in the decrease of rhizosphere Cd, Fe solubility and bioavailability. Higher redox potential in the rice rhizosphere resulted in the decline of transpiration, Cd, and Fe accumulation in the rice tissues, suggesting that the transfer of two elements from soil to rice was depressed when the rhizosphere was more oxidized.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Liu D
College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
Zhang C
No affiliation info available
Chen X
No affiliation info available
Yang Y
No affiliation info available
Wang S
No affiliation info available
Li Y
No affiliation info available
Hu H
No affiliation info available
Ge Y
No affiliation info available
Cheng W
No affiliation info available

MeSH

AdsorptionCadmiumHydrogen-Ion ConcentrationIronOryzaPlant RootsRhizosphereSoilSoil Pollutants

Pub Type(s)

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

Language

eng

PubMed ID

23749366

Citation

Liu, Danqing, et al. "Effects of pH, Fe, and Cd On the Uptake of Fe(2+) and Cd (2+) By Rice." Environmental Science and Pollution Research International, vol. 20, no. 12, 2013, pp. 8947-54.
Liu D, Zhang C, Chen X, et al. Effects of pH, Fe, and Cd on the uptake of Fe(2+) and Cd (2+) by rice. Environ Sci Pollut Res Int. 2013;20(12):8947-54.
Liu, D., Zhang, C., Chen, X., Yang, Y., Wang, S., Li, Y., Hu, H., Ge, Y., & Cheng, W. (2013). Effects of pH, Fe, and Cd on the uptake of Fe(2+) and Cd (2+) by rice. Environmental Science and Pollution Research International, 20(12), 8947-54. https://doi.org/10.1007/s11356-013-1855-y
Liu D, et al. Effects of pH, Fe, and Cd On the Uptake of Fe(2+) and Cd (2+) By Rice. Environ Sci Pollut Res Int. 2013;20(12):8947-54. PubMed PMID: 23749366.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of pH, Fe, and Cd on the uptake of Fe(2+) and Cd (2+) by rice. AU - Liu,Danqing, AU - Zhang,Chunhua, AU - Chen,Xue, AU - Yang,Yazhou, AU - Wang,Shu, AU - Li,Yujiao, AU - Hu,Hao, AU - Ge,Ying, AU - Cheng,Wangda, Y1 - 2013/06/08/ PY - 2012/12/05/received PY - 2013/05/22/accepted PY - 2013/6/11/entrez PY - 2013/6/12/pubmed PY - 2014/1/31/medline SP - 8947 EP - 54 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 20 IS - 12 N2 - The rhizosphere plays an important role in altering cadmium (Cd) solubility in paddy soils and Cd accumulation in rice. However, more studies are needed to elucidate the mechanism controlling rice Cd solubility and bioavailability under different rhizosphere conditions to explain the discrepancy of previous studies. A rice culture with nutrient solution and vermiculite was conducted to assess the effects of pH, Eh, and iron (Fe) concentration on Cd, Fe fractions on the vermiculite/root surface and their uptake by rice. The solution pH was set from 4.5 to 7.5, with additions of Fe (30 and 50 mg L(-1)) and Cd (0.5 and 0.9 mg L(-1)). At pH 5.5, the Eh in the rice rhizosphere was higher whereas transpiration, Cd(2+), and Fe(2+) adsorption on the vermiculite/root surface and accumulation in rice were lower than the other pH treatments. Cadmium addition had no impact on pH and Eh in rice rhizosphere while Fe addition decreased pH and increased Eh significantly. Compared with control, Fe addition resulted in the decrease of rhizosphere Cd, Fe solubility and bioavailability. Higher redox potential in the rice rhizosphere resulted in the decline of transpiration, Cd, and Fe accumulation in the rice tissues, suggesting that the transfer of two elements from soil to rice was depressed when the rhizosphere was more oxidized. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/23749366/Effects_of_pH_Fe_and_Cd_on_the_uptake_of_Fe_2+__and_Cd__2+__by_rice_ L2 - https://dx.doi.org/10.1007/s11356-013-1855-y DB - PRIME DP - Unbound Medicine ER -