ECOLOGY AND POPULATION BIOLOGY Induced Plant Resistance and Susceptibility to Late-Season Herbivores of Wild Radish
نویسندگان
چکیده
Wild radish is an annual plant that exhibits broad spectrum induced resistance to herbivores. In two experiments, we placed potted plants [control, manually clipped, and damaged byPieris rapae(L.) larvae] in theÞeld andassayed forovipositionbyP. rapae(a specialist herbivore), damage by ßea beetles (a specialist herbivore), and damage by rabbits (a generalist herbivore). Induced responses attracted oviposition by P. rapae and increased damage by ßea beetles, while having a minimal effect on rabbit herbivory. Plant families had different levels of resistance to herbivory by rabbits and to oviposition by P. rapae, but not to herbivory by ßea beetles. Manual clipping was a poor inducer of plant responses. Induced responses in wild radish can be a doubleedged sword, increasing herbivory by some herbivores under certain conditions, while reducing herbivory by other herbivores.
منابع مشابه
Evolution of plant resistance and tolerance to frost damage
Anurag A. Agrawal,* Jeffrey K. Conner and John R. Stinchcombe Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, ON, Canada M5S 3B2 Kellogg Biological Station and Department of Plant Biology, Michigan State University, 3700 East Gull Lake Drive, Hickory Corners, MI 49060, USA Department of Ecology and Evolutionary Biology, Box G-W, Brown University, Providence, RI 02912,...
متن کاملSalicylate-mediated interactions between pathogens and herbivores.
Plants employ hormone-mediated signaling pathways to defend against pathogens and insects. We tested predictions about the relative effect of jasmonate and salicylate pathways and how they mediate interactions between pathogens and herbivores. We employed two pathogens of tomato, Pseudomonas syringae (Pst) and tobacco mosaic virus (TMV), that are known to elicit distinct components of the two p...
متن کاملCan inducible resistance in plants cause herbivore aggregations? Spatial patterns in an inducible plant/herbivore model.
Many theories regarding the evolution of inducible resistance in plants have an implicit spatial component, but most relevant population dynamic studies ignore spatial dynamics. We examined a spatially explicit model of plant inducible resistance and herbivore population dynamics to explore how realistic features of resistance and herbivore responses influence spatial patterning. Both transient...
متن کاملBiogeographic and phylogenetic effects on feeding resistance of generalist herbivores toward plant chemical defenses.
Many terrestrial and most marine herbivores have generalist diets, yet the role that evolutionary history plays in their foraging behaviors is poorly documented. On tropical hard-bottom reefs, generalist fishes and sea urchins readily consume seaweeds that produce lipophilic secondary metabolites. In contrast, herbivores on temperate reefs less commonly encounter seaweeds with analogous metabol...
متن کاملPlant neighborhood effects on herbivory: damage is both density and frequency dependent.
Neighboring plants can affect the likelihood that a focal plant is attacked by herbivores. Both the density of conspecific neighbors (resource concentration or dilution effects) and the relative density of heterospecific neighbors (associational effects or effects of neighbor frequency) within the local neighborhood can affect herbivore load and plant damage. Understanding how these neighborhoo...
متن کامل