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Transfer of lead (Pb) in the soil-plant-mealybug-ladybird beetle food chain, a comparison between two host plants

文献类型： 外文期刊

作者： Zhang, Can 1 ; Wang, Xingmin 1 ; Ashraf, Umair 2 ; Qiu, Baoli 1 ; Ali, Shaukat 1 ;

作者机构： 1.South China Agr Univ, Engn Res Ctr Biol Control, Key Lab Biopesticide Innovat & Applicat, Guangzhou 510642, Guangdong, Peoples R China

2.South China Agr Univ, Coll Agr, Dept Crop Sci & Technol, Guangzhou 510642, Guangdong, Peoples R China

3.Minist Agr, Sci Observing & Expt Stn Crop Cultivat South Chin, Guangzhou 510642, Guangdong, Peoples R China

4.Guangdong New Scene Biol Engn Co Ltd, Guangdong Engn Res Ctr Microbial Pesticides, Yangjiang 529932, Peoples R China

关键词： Bio-transfer;Lead;Bio-minimization;Metamorphosis;Contamination

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.291； 五年影响因子：6.393 ）

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收录情况： SCI

摘要： Contamination of soil with heavy metals has become an issue of concern on global scale. This study investigates the translocation of lead (Pb) along the soil-plant (eggplant and tomato)-mealybug (Dysmicoccus neobrevipes) ladybird beetle (Cryptolaemus montrouzieri) food chain. Soil amendments used for this study were adjusted to 0, 25, 50 and 100 mg/kg of Pb (w/w). The results revealed significantly higher transfer of Pb in tomato when compared to eggplant. Bio-magnification of Pb (2-4 times) was observed for soil-root transfer whereas Pb was bio-minimized in later part of food chain (shoot mealybug-ladybird transfer). A dose dependent increase in transfer of Pb across the multi-trophic food chain was observed for both host plants. A decrease in coefficients of Pb transfer (from root-shoot and shoot-mealybug) was observed with increase in Pb concentrations. Our results also showed removal of Pb from the bodies of ladybird beetle during metamorphosis. Further studies are required to explain the mechanisms or physiological pathways involved in the bio-minimization of Pb across the food chain.

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