Heritable Phytohormone Profiles of Poplar Genotypes Vary in Resistance to a Galling Aphid

• DOI: 10.1094/mpmi-11-18-0301-r
• Publication Date: 2018-12-06T15:25:33Z
• Authors: Mélanie J. A. Body; Matthew S. Zinkgraf; Thomas G. Whitham; Chung-Ho Lin; Ryan A. Richardson; Heidi M. Appel; Jack C. Schultz
• Keywords: Plant Physiology

Insect galls are highly specialized structures arising from atypical development of plant tissue induced by insects. Galls provide the insect enhanced nutrition and protection against natural enemies environmental stresses. essentially organs formed an intimate biochemical interaction between gall-inducing its host plant. Because organs, their is likely to be governed phytohormones involved in normal organogenesis. We characterized concentrations both growth defensive ungalled control leaves aphid Pemphigus betae on narrowleaf cottonwood Populus angustifolia that differ genotypically resistance this insect. found susceptible trees differed resistant constitutive defense phytohormones. Susceptible were significantly higher cytokinin leaves, greater ability aphids elicit increases, lower phytohormone than observed trees. Phytohormone responses galled exhibited high broad-sense heritability that, respectively, ranged 0.39 0.93 0.28 0.66, suggesting selection can act upon these traits they might vary across landscape. Increased may facilitate forming strong photosynthate sinks galls, a requirement for galling success. By characterizing first time changes 15 belonging five different classes, study offers better overview signaling alteration occurring has been important ecology evolution. Copyright © 2019 The Author(s). This open-access article distributed under CC BY-NC-ND 4.0 International license .