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Abstract Detail

Phytochemistry: From atoms to organisms

Weber, Marjorie [1].

Linking species-interactions to macroevolution using the phylogenetic distribution of phytochemical diversity.

Plants have evolved a myriad of fascinating ways to defend themselves against pathogens and herbivores. One common way species defend themselves is through chemical compounds that directly deter herbivory. Another mechanism that has originated many times across the plant tree of life is the evolution of specialized plant traits that provide rewards (e.g., food or shelter) to bodyguard arthropods in return for protection against plant enemies. These latter traits, known as indirect defense traits, attract and retain the third trophic level to plants, thereby facilitating top-down defense from plant enemies via a tri-trophic interaction. Theory has long predicted tradeoffs among direct and indirect defensive traits, however, we lack studies aimed at understanding how multiple defensive traits interact to influence the long-term evolution of species-interaction traits. Here, we characterize the macroevolutionary patterns of indirect (mite domatia) and direct (chemical) defense trait variation across the wild grape genus, Vitis, testing for signatures consistent with trait trade-off and local adaptation hypotheses. We use this system as a model for linking species interactions to macroevolution using phylogenetic comparative modeling of traits that mediate interactions among trophic levels.

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1 - Michigan State University, Plant Biology Laboratories, 612 Wilson Road, Rm 166, East Lansing, MI, 48824, United States

plant-insect interactions

Presentation Type: Colloquium Presentations
Session: C05, Phytochemistry: From Atoms to Organisms
Location: /
Date: Wednesday, July 21st, 2021
Time: 11:30 AM(EDT)
Number: C05006
Abstract ID:109
Candidate for Awards:None

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