Variation of grain Cd and Zn concentrations of 110 hybrid rice cultivars grown in a low-Cd paddy soil.
J Environ Sci (China). 2009; 21(2):168-72.JE

Abstract

Enhanced Cd uptake and Zn depletion in rice grains and high potential for food Cd exposure by the high-yielding hybrid cultivars of China had been addressed. A field experiment was conducted in 2006 to determine the difference in grain Cd and Zn between cultivars. Total 110 cultivars including super rice and common hybrid rice cultivars were grown on a single paddy soil (Entic Haplaquept) with a neutral reaction and low total Cd content. Grain Cd and Zn concentrations were determined with graphite atomic adsorption spectrophotometer (GFAAS) and flame atomic adsorption spectrophotometer (AAS) respectively. Wide variation of Cd content in grain was found in a range of 0.004-0.057 mg/kg, while the Zn content in a range of 10.25-30.06 mg/kg among the cultivars. Higher Cd but lower Zn concentration in grains of super rice cultivars was observed compared to the common hybrid ones. A highly significant positive linear correlation of grain Cd/Zn with grain Cd was found for super rice and common hybrid cultivars, meanwhile much higher slope for these hybrid cultivars than the reported non-hybrid cultivars was also observed. Using the limit value of the Chinese chemical guidelines for foods (MOHC and SSC, 2005), calculated potential risk of food Cd exposure with "Zn hungry" through diet intake was prominent with all the studied 110 hybrid rice cultivars, possessing high potential health problems for rice production in South China using the super rice cultivars. Breeding of genotypes of rice cultivars with low grain Cd and low Cd/Zn ratio is needed for rice production in acidic red soils where Cd bioavailability is prevalently high.

Authors+Show Affiliations

Shi J

Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, China. shjing1980@yahoo.com.cn

Li L

No affiliation info available

Pan G

No affiliation info available

MeSH

CadmiumCrops, AgriculturalHybridization, GeneticOryzaSeedsSoilZinc

Pub Type(s)

Journal Article

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

Language

eng

PubMed ID

19402417

Citation

Shi, Jing, et al. "Variation of Grain Cd and Zn Concentrations of 110 Hybrid Rice Cultivars Grown in a low-Cd Paddy Soil." Journal of Environmental Sciences (China), vol. 21, no. 2, 2009, pp. 168-72.

Shi J, Li L, Pan G. Variation of grain Cd and Zn concentrations of 110 hybrid rice cultivars grown in a low-Cd paddy soil. J Environ Sci (China). 2009;21(2):168-72.

Shi, J., Li, L., & Pan, G. (2009). Variation of grain Cd and Zn concentrations of 110 hybrid rice cultivars grown in a low-Cd paddy soil. Journal of Environmental Sciences (China), 21(2), 168-72.

Shi J, Li L, Pan G. Variation of Grain Cd and Zn Concentrations of 110 Hybrid Rice Cultivars Grown in a low-Cd Paddy Soil. J Environ Sci (China). 2009;21(2):168-72. PubMed PMID: 19402417.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - Variation of grain Cd and Zn concentrations of 110 hybrid rice cultivars grown in a low-Cd paddy soil. AU - Shi,Jing, AU - Li,Lianqing, AU - Pan,Genxing, PY - 2009/5/1/entrez PY - 2009/5/1/pubmed PY - 2009/5/20/medline SP - 168 EP - 72 JF - Journal of environmental sciences (China) JO - J Environ Sci (China) VL - 21 IS - 2 N2 - Enhanced Cd uptake and Zn depletion in rice grains and high potential for food Cd exposure by the high-yielding hybrid cultivars of China had been addressed. A field experiment was conducted in 2006 to determine the difference in grain Cd and Zn between cultivars. Total 110 cultivars including super rice and common hybrid rice cultivars were grown on a single paddy soil (Entic Haplaquept) with a neutral reaction and low total Cd content. Grain Cd and Zn concentrations were determined with graphite atomic adsorption spectrophotometer (GFAAS) and flame atomic adsorption spectrophotometer (AAS) respectively. Wide variation of Cd content in grain was found in a range of 0.004-0.057 mg/kg, while the Zn content in a range of 10.25-30.06 mg/kg among the cultivars. Higher Cd but lower Zn concentration in grains of super rice cultivars was observed compared to the common hybrid ones. A highly significant positive linear correlation of grain Cd/Zn with grain Cd was found for super rice and common hybrid cultivars, meanwhile much higher slope for these hybrid cultivars than the reported non-hybrid cultivars was also observed. Using the limit value of the Chinese chemical guidelines for foods (MOHC and SSC, 2005), calculated potential risk of food Cd exposure with "Zn hungry" through diet intake was prominent with all the studied 110 hybrid rice cultivars, possessing high potential health problems for rice production in South China using the super rice cultivars. Breeding of genotypes of rice cultivars with low grain Cd and low Cd/Zn ratio is needed for rice production in acidic red soils where Cd bioavailability is prevalently high. SN - 1001-0742 UR - https://www.unboundmedicine.com/medline/citation/19402417/Variation_of_grain_Cd_and_Zn_concentrations_of_110_hybrid_rice_cultivars_grown_in_a_low_Cd_paddy_soil_ L2 - https://antibodies.cancer.gov/detail/CPTC-CTLA4-1 DB - PRIME DP - Unbound Medicine ER -

Tags

Variation of grain Cd and Zn concentrations of 110 hybrid rice cultivars grown in a low-Cd paddy soil.J Environ Sci (China). 2009; 21(2):168-72.JE