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Abstract Detail


Ecological Section

Cheruiyot, Dorothy [1], Boyd, Robert [1].

Toxicity of Hyperaccumulated metals to larvae of the beet armyworm (Spodoptera exigua).

Elemental defense is a relatively newly recognized phenomenon in which high concentrations of elements in plant tissues reduce damage by natural enemies. In the present study, neonates of Spodoptera exigua were fed artificial diets amended with varying concentrations of four metals (Co, Cu, Ni and Zn) hyperaccumulated by plants. After seven days, the number of live larvae and their weights were recorded and analyzed to determine minimum lethal and minimum sublethal concentrations of each metal (compared to control values). Minimum lethal concentrations for all metals were below the minimum concentrations used to define hyperaccumulator plants. Minimum sublethal concentrations were below the minimum concentrations used to define accumulator plants. The results indicate that plants other than hyperaccumulators of these four metals (such as accumulators) may benefit from elemental defenses and that these defenses may be more important than previously believed.

Broader Impacts:


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1 - Auburn University, Biological sciences, 101 Rouse Life Sciences Building, Auburn, Al, 36849

Keywords:
Elemental Defense.

Presentation Type: Oral Paper:Papers for Sections
Session: 33
Location: 555B/Convention Center
Date: Tuesday, August 3rd, 2010
Time: 11:15 AM
Number: 33005
Abstract ID:126


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