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Plos Biology : Trophic Complexity and the Adaptive Value of Damage- Induced Plant Volatiles, Volume 10

By Marris, Claire

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Book Id: WPLBN0003922441
Format Type: PDF eBook :
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Reproduction Date: 2015

Title: Plos Biology : Trophic Complexity and the Adaptive Value of Damage- Induced Plant Volatiles, Volume 10  
Author: Marris, Claire
Volume: Volume 10
Language: English
Subject: Journals, Science, Biology
Collections: Periodicals: Journal and Magazine Collection (Contemporary), PLoS Biology
Historic
Publication Date:
Publisher: Plos

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Marris, C. (n.d.). Plos Biology : Trophic Complexity and the Adaptive Value of Damage- Induced Plant Volatiles, Volume 10. Retrieved from http://netlibrary.net/


Description
Description : Indirect plant defenses are those facilitating the action of carnivores in ridding plants of their herbivorous consumers, as opposed to directly poisoning or repelling them. Of the numerous and diverse indirect defensive strategies employed by plants, inducible volatile production has garnered the most fascination among plant-insect ecologists. These volatile chemicals are emitted in response to feeding by herbivorous arthropods and serve to guide predators and parasitic wasps to their prey. Implicit in virtually all discussions of plant volatile-carnivore interactions is the premise that plants ‘‘call for help’’ to bodyguards that serve to boost plant fitness by limiting herbivore damage. This, by necessity, assumes a three-trophic level food chain where carnivores benefit plants, a theoretical framework that is conceptually tractable and convenient, but poorly depicts the complexity of food-web dynamics occurring in real communities. Recent work suggests that hyperparasitoids, top consumers acting from the fourth trophic level, exploit the same plant volatile cues used by third trophic level carnivores. Further, hyperparasitoids shift their foraging preferences, specifically cueing in to the odor profile of a plant being damaged by a parasitized herbivore that contains their host compared with damage from an unparasitized herbivore. If this outcome is broadly representative of plant-insect food webs at large, it suggests that damage-induced volatiles may not always be beneficial to plants with major implications for the evolution of anti-herbivore defense and manipulating plant traits to improve biological control in agricultural Crops.

 

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