The effects of feeding by the black bean aphidAphis fabae Scop. (Homoptera: Aphididae) on copper and cadmium accumulation in broad bean (Vicia faba L.) |
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Authors: | Linda A Crawford Ian D Hodkinson Nicholas W Lepp |
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Institution: | (1) School of Natural Sciences, Liverpool Polytechnic, Byrom Street, L3 3AF Liverpool, UK;(2) Present address: Department of General Education, Burnley College, Shorey Bank, Ormerod Road, BB11 2RX Burnley, Lanes, UK |
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Abstract: | Broad beans (Vicia faba L.), cultured hydroponically were supplied with 100 g mL–1 copper or 50 g mL–1 cadmium in nutrient solution. Samples of plant material from both nutrient regimes were analysed before and after infestation by the black bean aphid (Aphis fabae Scop.). Heavy aphid infestation resulted in a significant reduction in copper content of shoots in comparison with uninfested plants. A similar, but less well- defined, situation occurred in the case of cadmium.Further investigations examined the effects of different levels of aphid infestation on the above phenomena. In all cases the presence of feeding aphids reduced elemental accumulation in plant shoots. Long term infestation with population densities as low as three adult aphids showed a reduction in shoot copper and cadmium content. |
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