Cardenolides in nectar may be more than a consequence of allocation to other plant parts: a phylogenetic study of Asclepias
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چکیده
consequence of allocation to other plant parts: a phylogenetic study of Asclepias Jessamyn S. Manson*, Sergio Rasmann, Rayko Halitschke, James D. Thomson and Anurag A. Agrawal Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, M5S 3B2 Canada; Department of Ecology and Evolution, University of Lausanne, Lausanne, CH – 1015 Switzerland; and Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, 14853 USA
منابع مشابه
Cardenolides, induced responses, and interactions between above- and belowground herbivores of milkweed (Asclepias spp.).
Theory has long predicted allocation patterns for plant defense against herbivory, but only recently have both above- and belowground plant defenses been considered simultaneously. Milkweeds in the genus Asclepias are a classic chemically defended clade of plants with toxic cardenolides (cardiac glycosides) and pressurized latex employed as anti-herbivore weapons. Here we combine a comparative ...
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Attraction of mutualists and defense against antagonists are critical challenges for most organisms and can be especially acute for plants with pollinating and non-pollinating flower visitors. Secondary compounds in flowers have been hypothesized to adaptively mediate attraction of mutualists and defense against antagonists, but this hypothesis has rarely been tested. The tissues of milkweeds (...
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1. Trade-offs in an herbivore’s ability to feed, avoid predation and succeed on alternative hosts are thought to be major driving factors in host specialization. In this study, we compared how two closely related milkweed beetles (Tetraopes spp.) that have specialized on separate Asclepias species respond to host switching to alternative milkweed plants. By additionally examining effects on the...
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Costs of plant defense are a key assumption in evolutionary ecology, yet their detection has remained challenging. Here we introduce a novel method for quantifying plant growth using the common milkweed Asclepias syriaca and repeated non-destructive size measurements to experimentally test for costs of defensive traits. We estimated mechanistic components of plant growth (relative growth rate, ...
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Theory predicts that plants will increase their defenses against herbivores over time; however, several milkweed defenses have declined as the genus Asclepias has diversified. We review the evolutionary history of milkweed defense and provide new findings from an experiment on 53 Asclepias species. As predicted, monarch performance increased on more recently evolved species, and latex was prima...
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تاریخ انتشار 2012