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    The nutritional landscape of host plants for a specialist insect herbivore

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    Name:
    Wilson_et_al-2019-Ecology_and_ ...
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    Description:
    Final Published Version
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    Author
    Wilson, Jerome Keaton
    Ruiz, Laura
    Duarte, Jesse
    Davidowitz, Goggy
    Affiliation
    Univ Arizona, Sch Nat Resources & Environm
    Univ Arizona, Neurosci & Cognit Sci
    Univ Arizona, Dept Entomol
    Univ Arizona, Ecol & Evolutionary Biol
    Issue Date
    2019-11-08
    Keywords
    geometric framework
    Manduca sexta
    nutrient space
    plant nutrition
    plant-insect interactions
    
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    Show full item record
    Publisher
    WILEY
    Citation
    Wilson, J. K., Ruiz, L., Duarte, J., & Davidowitz, G. (2019). The nutritional landscape of host plants for a specialist insect herbivore. Ecology and Evolution.
    Journal
    ECOLOGY AND EVOLUTION
    Rights
    Copyright © 2019 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Nutrition has far-reaching effects on both the ecology and evolution of species. A substantial body of work has examined the role of host plant quality on insect herbivores, with a particular focus on specialist-generalist dynamics, the interaction of growth and other physiological attributes on fitness and tritrophic effects. Measures of plant quality usually involve one or two axes of nutritional space: typically secondary metabolites or elemental proxies (N and C) of protein and carbohydrates, respectively. Here, we describe the nutrient space of seven host plants of the specialist insect herbivore, Manduca sexta, using an approach that measures physiologically relevant sources of nutrition, soluble protein and digestible carbohydrates. We show that plant species differ markedly in their nutrient content, offering developing insect herbivores a range of available nutrient spaces that also depend on the age of the leaves being consumed. The majority of host-plant species produce diets that are suboptimal to the herbivore, likely resulting in varying levels of compensatory feeding for M. sexta to reach target levels of protein to ensure successful growth and development. Low-quality diets can also impact immune function leading to complex patterns of optimization of plant resources that maximizes both growth and the ability to defend from parasitoids and pathogens. This study is the first to quantify the nutrient space of a suite of host plants used by an insect herbivore using physiologically relevant measures of nutrition.
    Note
    Open access journal
    ISSN
    2045-7758
    DOI
    10.1002/ece3.5730
    Version
    Final published version
    Sponsors
    National Science Foundation (NSF) [IOS-1053318]; Center for Insect Science National Institutes of Health Postdoctoral Excellence in Research and Teaching (PERT) [K12GM000708]
    ae974a485f413a2113503eed53cd6c53
    10.1002/ece3.5730
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