Biotransfer of Cd along a soil-plant- mealybug-ladybird food chain: A comparison with host plants

文献类型： 外文期刊

第一作者： Wang, Xingmin

作者： Wang, Xingmin;Zhang, Can;Qiu, Baoli;Azad, Rashid;Wu, Jianhui;Ali, Shaukat;Ashraf, Umair;Ashraf, Umair;Ali, Shaukat

作者机构：

关键词： Bio-transfer;Cadmium;Food chain;Plants;Contamination

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

ISSN： 0045-6535

年卷期： 2017 年 168 卷

页码：

收录情况： SCI

摘要： Agro-ecosystem contamination by the heavy metals present in different agricultural products is a serious challenge faced by the living organisms. This study explains the cadmium (Cd) transfer from soils contaminated with different cadmium concentrations through a plant (eggplant and tomato) - mealybug (Dysmicoccus neobrevipes) - predator (Cryptolaemus-montrouzieri) food chain. The soils were amended with Cd at the rates of 0, 12.5, 25 and 50 mg/kg (w/w). Our findings showed that considerably higher Cd transfer through tomato plant. Cadmium was biomagnified during soil-root transfer while bio-minimization of Cd was observed for shoot-mealybug - ladybird transfer. Our results further showed sequestration of Cd during the metamorphosis of ladybird beetle whilst transfer of Cd through soil-plant-mealybug-ladybird multi-trophic food chain increased in a dose dependent manner. Our results emphasize the need of further studies to elaborate possible mechanisms of Cd bio-minimization by plants, mealybugs and ladybirds observed during this study. (C) 2016 Elsevier Ltd. All rights reserved.

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