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Variation in cadmium accumulation among 30 cultivars and cadmium subcellular distribution in 2 selected cultivars of water spinach (Ipomoea aquatica Forsk.).
J Agric Food Chem. 2009 Oct 14; 57(19):8942-9.JA

Abstract

To reduce the influx of cadmium (Cd), a toxic heavy metal, into the human food chain through vegetable intake, a pot experiment for the selection of a pollution-safe cultivar (PSC) of water spinach (Ipomoea aquatica Forsk.) was carried out. The experiment with 30 tested cultivars revealed that the maximum differences in Cd concentration between the cultivars containing the highest and the lowest Cd were 3.0-3.9-fold under low-Cd treatment (soil Cd = 0.593 mg kg(-1)), 2.7-3.5-fold under middle-Cd treatment (soil Cd = 1.091 mg kg(-1)), and 2.6-2.7-fold under high-Cd treatment (soil Cd = 1.824 mg kg(-1)), large enough to define the Cd-PSCs. Concentrations of Cd in edible parts of six cultivars, cv. Daxingbaigu, Huifengqing, Qiangkunbaigu, Qiangkunqinggu, Shenniuliuye, and Xingtianqinggu, were lower than 0.2 mg kg(-1), the maximum level (ML) of Cd allowed by the Codex Alimentarius Commission (CAC) standard, even under middle-Cd treatment. Accordingly, these cultivars were treated as typical Cd-PSCs. Four cultivars, cv. Jieyangbaigeng, Xianggangdaye, Sannongbaigeng, and Taiwan 308, contained Cd in edible parts exceeding the ML even under low-Cd treatment, and they were defined as typical non-Cd-PSCs. The correlations of the Cd concentrations among the tested cultivars between the three treatments were significant at the p < 0.05 level. A conspicuous difference in Cd subcellular distribution in hydroponic plant tissues between cv. Qiangkunqinggu (a typical Cd-PSC) and cv. Taiwan 308 (a typical non-Cd-PSC) were observed. Cd absorbed by cv. Qiangkunqinggu seemed to be well-compartmentalized in root and in cell wall fragment, which may be one of the mechanisms leading to its low Cd accumulating property. The results indicated that water spinach, a leafy vegetable, could be easily polluted by soils contaminated with Cd, as 80% of the tested cultivars had exceeded the ML of Cd according to the CAC standard even under the middle-Cd treatment. Much of the evidence obtained from the present study proved that the high Cd-accumulating ability of water spinach is a stable biological property at cultivar level and, thus, is genotype dependent. Therefore, application of the PSC strategy to produce water spinach that is safer to consume is feasible and necessary.

Authors+Show Affiliations

State Key Laboratory for Biocontrol and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

19739670

Citation

Wang, Junli, et al. "Variation in Cadmium Accumulation Among 30 Cultivars and Cadmium Subcellular Distribution in 2 Selected Cultivars of Water Spinach (Ipomoea Aquatica Forsk.)." Journal of Agricultural and Food Chemistry, vol. 57, no. 19, 2009, pp. 8942-9.
Wang J, Yuan J, Yang Z, et al. Variation in cadmium accumulation among 30 cultivars and cadmium subcellular distribution in 2 selected cultivars of water spinach (Ipomoea aquatica Forsk.). J Agric Food Chem. 2009;57(19):8942-9.
Wang, J., Yuan, J., Yang, Z., Huang, B., Zhou, Y., Xin, J., Gong, Y., & Yu, H. (2009). Variation in cadmium accumulation among 30 cultivars and cadmium subcellular distribution in 2 selected cultivars of water spinach (Ipomoea aquatica Forsk.). Journal of Agricultural and Food Chemistry, 57(19), 8942-9. https://doi.org/10.1021/jf900812s
Wang J, et al. Variation in Cadmium Accumulation Among 30 Cultivars and Cadmium Subcellular Distribution in 2 Selected Cultivars of Water Spinach (Ipomoea Aquatica Forsk.). J Agric Food Chem. 2009 Oct 14;57(19):8942-9. PubMed PMID: 19739670.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Variation in cadmium accumulation among 30 cultivars and cadmium subcellular distribution in 2 selected cultivars of water spinach (Ipomoea aquatica Forsk.). AU - Wang,Junli, AU - Yuan,Jiangang, AU - Yang,Zhongyi, AU - Huang,Baifei, AU - Zhou,Yihui, AU - Xin,Junliang, AU - Gong,Yulian, AU - Yu,Hui, PY - 2009/9/11/entrez PY - 2009/9/11/pubmed PY - 2010/1/29/medline SP - 8942 EP - 9 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 57 IS - 19 N2 - To reduce the influx of cadmium (Cd), a toxic heavy metal, into the human food chain through vegetable intake, a pot experiment for the selection of a pollution-safe cultivar (PSC) of water spinach (Ipomoea aquatica Forsk.) was carried out. The experiment with 30 tested cultivars revealed that the maximum differences in Cd concentration between the cultivars containing the highest and the lowest Cd were 3.0-3.9-fold under low-Cd treatment (soil Cd = 0.593 mg kg(-1)), 2.7-3.5-fold under middle-Cd treatment (soil Cd = 1.091 mg kg(-1)), and 2.6-2.7-fold under high-Cd treatment (soil Cd = 1.824 mg kg(-1)), large enough to define the Cd-PSCs. Concentrations of Cd in edible parts of six cultivars, cv. Daxingbaigu, Huifengqing, Qiangkunbaigu, Qiangkunqinggu, Shenniuliuye, and Xingtianqinggu, were lower than 0.2 mg kg(-1), the maximum level (ML) of Cd allowed by the Codex Alimentarius Commission (CAC) standard, even under middle-Cd treatment. Accordingly, these cultivars were treated as typical Cd-PSCs. Four cultivars, cv. Jieyangbaigeng, Xianggangdaye, Sannongbaigeng, and Taiwan 308, contained Cd in edible parts exceeding the ML even under low-Cd treatment, and they were defined as typical non-Cd-PSCs. The correlations of the Cd concentrations among the tested cultivars between the three treatments were significant at the p < 0.05 level. A conspicuous difference in Cd subcellular distribution in hydroponic plant tissues between cv. Qiangkunqinggu (a typical Cd-PSC) and cv. Taiwan 308 (a typical non-Cd-PSC) were observed. Cd absorbed by cv. Qiangkunqinggu seemed to be well-compartmentalized in root and in cell wall fragment, which may be one of the mechanisms leading to its low Cd accumulating property. The results indicated that water spinach, a leafy vegetable, could be easily polluted by soils contaminated with Cd, as 80% of the tested cultivars had exceeded the ML of Cd according to the CAC standard even under the middle-Cd treatment. Much of the evidence obtained from the present study proved that the high Cd-accumulating ability of water spinach is a stable biological property at cultivar level and, thus, is genotype dependent. Therefore, application of the PSC strategy to produce water spinach that is safer to consume is feasible and necessary. SN - 1520-5118 UR - https://www.unboundmedicine.com/medline/citation/19739670/Variation_in_cadmium_accumulation_among_30_cultivars_and_cadmium_subcellular_distribution_in_2_selected_cultivars_of_water_spinach__Ipomoea_aquatica_Forsk___ L2 - https://doi.org/10.1021/jf900812s DB - PRIME DP - Unbound Medicine ER -