title: Long distance root-shoot signalling in plant-insect community interactions.
abstract: Plants mediate interactions between insects, including leaf- and root-feeders; yet the underlying mechanisms and connection with ecological theory remain unresolved. In this review, based on novel insights into long-distance (i.e., leaf-leaf, root-shoot) defence signalling, we explore the role of phytohormones in driving broad-scale patterns of aboveground-belowground interactions that can be extrapolated to general plant-insect relationships. We propose that the outcome of intra-feeding guild interactions is generally negative due to induction of similar phytohormonal pathways, whereas between-guild interactions are often positive due to negative signal crosstalk. However, not all outcomes could be explained by feeding guild; we argue that future studies should target ecologically representative plant-insect systems, distinguish subguilds, and include plant growth hormones to improve our understanding of plant-mediated interactions.
authors.affiliation: Laboratory of Entomology, Wageningen University, P.O. Box 8031, 6700 EH Wageningen, The Netherlands. r.soler@nioo.knaw.nl
authors.forename: Roxina
authors.initials: R
authors.lastname: Soler
authors.forename: Matthias
authors.initials: M
authors.lastname: Erb
authors.forename: Ian
authors.initials: I
authors.lastname: Kaplan
mesh_terms: D000818:Animals; D060434:Herbivory; D006790:Host-Parasite Interactions; D007313:Insecta / Q000502:physiology*; D052585:Phloem / Q000276:immunology / Q000378:metabolism / Q000502:physiology; D010937:Plant Growth Regulators / Q000378:metabolism*; D057865:Plant Immunity; D018515:Plant Leaves / Q000276:immunology / Q000378:metabolism / Q000502:physiology; D018521:Plant Physiological Phenomena; D018517:Plant Roots / Q000276:immunology / Q000378:metabolism / Q000502:physiology; D018520:Plant Shoots / Q000276:immunology / Q000378:metabolism / Q000502:physiology; D010944:Plants / Q000276:immunology / Q000378:metabolism*; D015398:Signal Transduction
chemical_list: D010937:Plant Growth Regulators