title: Colorado potato beetle manipulates plant defenses in local and systemic leaves.
abstract: Herbivore microbial associates can affect diverse interactions between plants and insect herbivores. Some insect symbionts enable herbivores to expand host plant range or to facilitate host plant use by modifying plant physiology. However, little attention has been paid to the role of herbivore-associated microbes in manipulating plant defenses. We have recently shown that Colorado potato beetle secrete the symbiotic bacteria to suppress plant defenses. The bacteria in oral secretions from the beetle hijack defense signaling pathways of host plants and the suppression of induced plant defenses benefits the beetle's performance. While the defense suppression by the beetle-associated bacteria has been investigated in local damaged leaves, little is known about the effects of the symbiotic bacteria on the manipulation of plant defenses in systemic undamaged leaves. Here, we demonstrate that the symbiotic bacteria suppress plant defenses in both local and systemic tissues when plants are attacked by antibiotic-untreated larvae.
authors.affiliation: Department of Entomology and Center for Chemical Ecology; The Pennsylvania State University; University Park; PA USA.
authors.forename: Seung Ho
authors.initials: SH
authors.lastname: Chung
authors.affiliation: Department of Entomology and Center for Chemical Ecology; The Pennsylvania State University; University Park; PA USA.
authors.forename: Cristina
authors.initials: C
authors.lastname: Rosa
authors.affiliation: Department of Entomology and Center for Chemical Ecology; The Pennsylvania State University; University Park; PA USA.
authors.forename: Kelli
authors.initials: K
authors.lastname: Hoover
authors.affiliation: Department of Plant Science and Center for Chemical Ecology; The Pennsylvania State University; University Park; PA USA.
authors.forename: Dawn S
authors.initials: DS
authors.lastname: Luthe
authors.affiliation: Department of Entomology and Center for Chemical Ecology; The Pennsylvania State University; University Park; PA USA.
authors.forename: Gary W
authors.initials: GW
authors.lastname: Felton
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D001517:Coleoptera / Q000187:drug effects / Q000502:physiology*; D003120:Colorado; D007814:Larva / Q000187:drug effects / Q000502:physiology; D057865:Plant Immunity / Q000187:drug effects; D018515:Plant Leaves / Q000469:parasitology*; D011198:Solanum tuberosum / Q000276:immunology* / Q000469:parasitology*
chemical_list: D000900:Anti-Bacterial Agents
keywords: Plant-microbe-insect interactions; induced defenses; insect symbionts; systemic response; tomato