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Influence of iron plaque on uptake and accumulation of Cd by rice (Oryza sativa L.) seedlings grown in soil.
Sci Total Environ. 2008 May 15; 394(2-3):361-8.ST

Abstract

Iron plaque is ubiquitously formed on the root surfaces of rice. However, little is known about the role of iron plaque in Cd movement from soil to the plant aboveground parts. A pot experiment was conducted to investigate the influence of iron plaque in Cd uptake and accumulation by rice seedlings in soil. Rice seedlings were pre-cultivated in solution culture for 16 days. Two seedlings were transplanted in a nylon bag containing no substrate but surrounded by soil amended with Fe and Cd combined at rates of 0, 1, or 2 g Fe kg(-1) and 0, 2.0, or 10 mg Cd kg(-1) soil. Fe was added to induce different amounts of iron plaque, and Cd to simulate Cd-polluted soils. Plants were grown for a further 43 days and then harvested. The length of the longest leaf and SPAD values of the newly mature leaves were measured during plant growth. Fe and Cd concentrations were determined in dithionite-citrate-bicarbonate (DCB) soil extracts and in plant roots and shoots. Shoot and root dry weights were significantly affected by Fe supply level but not by added Cd. Root dry weight declined with increasing Fe supply but shoot dry weight decreased at 2 g Fe kg(-1) and increased at 1 g Fe kg(-1) (except at 2 mg Cd kg(-1)). The length of the longest leaf and SPAD values of the newly mature leaves were significantly affected by plant growth stage and added Fe and Cd. Fe tended to diminish the negative effect of Cd on these two parameters. Cd concentrations in DCB extracts increased with increasing Cd and Fe supply. In contrast, external Fe supply markedly reduced shoot and root Cd concentrations and there was generally no significant difference between the two Fe supply levels. Shoot and root Cd concentrations increased with increasing Cd addition. Root Cd concentrations were negatively correlated with root Fe concentrations. The proportion of Cd in DCB extracts was significantly lower than in roots or shoots. The results indicate that enhanced Fe uptake by plants can diminish the negative effects of Cd to some extent and that iron plaque on root surfaces is of little significance in affecting uptake and accumulation of Cd by rice plants.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Liu H
College of Soil and Environmental Sciences, Shenyang Agricultural University, Shenyang 110161, China.
Zhang J
No affiliation info available
Christie P
No affiliation info available
Zhang F
No affiliation info available

MeSH

CadmiumIronOryzaPlant LeavesPlant RootsPlant ShootsSeedlingsSoil Pollutants

Pub Type(s)

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

Language

eng

PubMed ID

18325566

Citation

Liu, Houjun, et al. "Influence of Iron Plaque On Uptake and Accumulation of Cd By Rice (Oryza Sativa L.) Seedlings Grown in Soil." The Science of the Total Environment, vol. 394, no. 2-3, 2008, pp. 361-8.
Liu H, Zhang J, Christie P, et al. Influence of iron plaque on uptake and accumulation of Cd by rice (Oryza sativa L.) seedlings grown in soil. Sci Total Environ. 2008;394(2-3):361-8.
Liu, H., Zhang, J., Christie, P., & Zhang, F. (2008). Influence of iron plaque on uptake and accumulation of Cd by rice (Oryza sativa L.) seedlings grown in soil. The Science of the Total Environment, 394(2-3), 361-8. https://doi.org/10.1016/j.scitotenv.2008.02.004
Liu H, et al. Influence of Iron Plaque On Uptake and Accumulation of Cd By Rice (Oryza Sativa L.) Seedlings Grown in Soil. Sci Total Environ. 2008 May 15;394(2-3):361-8. PubMed PMID: 18325566.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of iron plaque on uptake and accumulation of Cd by rice (Oryza sativa L.) seedlings grown in soil. AU - Liu,Houjun, AU - Zhang,Junling, AU - Christie,Peter, AU - Zhang,Fusuo, Y1 - 2008/03/05/ PY - 2007/07/31/received PY - 2008/01/31/revised PY - 2008/02/02/accepted PY - 2008/3/8/pubmed PY - 2008/8/13/medline PY - 2008/3/8/entrez SP - 361 EP - 8 JF - The Science of the total environment JO - Sci Total Environ VL - 394 IS - 2-3 N2 - Iron plaque is ubiquitously formed on the root surfaces of rice. However, little is known about the role of iron plaque in Cd movement from soil to the plant aboveground parts. A pot experiment was conducted to investigate the influence of iron plaque in Cd uptake and accumulation by rice seedlings in soil. Rice seedlings were pre-cultivated in solution culture for 16 days. Two seedlings were transplanted in a nylon bag containing no substrate but surrounded by soil amended with Fe and Cd combined at rates of 0, 1, or 2 g Fe kg(-1) and 0, 2.0, or 10 mg Cd kg(-1) soil. Fe was added to induce different amounts of iron plaque, and Cd to simulate Cd-polluted soils. Plants were grown for a further 43 days and then harvested. The length of the longest leaf and SPAD values of the newly mature leaves were measured during plant growth. Fe and Cd concentrations were determined in dithionite-citrate-bicarbonate (DCB) soil extracts and in plant roots and shoots. Shoot and root dry weights were significantly affected by Fe supply level but not by added Cd. Root dry weight declined with increasing Fe supply but shoot dry weight decreased at 2 g Fe kg(-1) and increased at 1 g Fe kg(-1) (except at 2 mg Cd kg(-1)). The length of the longest leaf and SPAD values of the newly mature leaves were significantly affected by plant growth stage and added Fe and Cd. Fe tended to diminish the negative effect of Cd on these two parameters. Cd concentrations in DCB extracts increased with increasing Cd and Fe supply. In contrast, external Fe supply markedly reduced shoot and root Cd concentrations and there was generally no significant difference between the two Fe supply levels. Shoot and root Cd concentrations increased with increasing Cd addition. Root Cd concentrations were negatively correlated with root Fe concentrations. The proportion of Cd in DCB extracts was significantly lower than in roots or shoots. The results indicate that enhanced Fe uptake by plants can diminish the negative effects of Cd to some extent and that iron plaque on root surfaces is of little significance in affecting uptake and accumulation of Cd by rice plants. SN - 0048-9697 UR - https://www.unboundmedicine.com/medline/citation/18325566/Influence_of_iron_plaque_on_uptake_and_accumulation_of_Cd_by_rice__Oryza_sativa_L___seedlings_grown_in_soil_ DB - PRIME DP - Unbound Medicine ER -