Modulation of Legume Defense Signaling Pathways by Native and Non-native Pea Aphid Clones

• DOI: 10.3389/fpls.2016.01872
• Publication Date: 2016-12-19T12:19:59Z
• Authors: Carlos Sanchez-Arcos; Michael Reichelt; Jonathan Gershenzon; Grit Kunert
• Keywords: Acyrthosiphon pisum; Jasmonic acid

The pea aphid (Acyrthosiphon pisum) is a complex of at least 15 genetically different host races that are native to specific legume plants, but can all develop on the universal plant Vicia faba. Despite much research it still unclear why (biotypes) able colonize their hosts while other not. All aphids penetrate and salivate into cells when they test suitability. Thus plants might react differently various races. To find out whether species vary in defense responses races, we measured amounts salicylic acid (SA), jasmonic acid-isoleucine conjugate (JA-Ile), jasmonate precursors derivatives, abscisic (ABA) four (Medicago sativa, Trifolium pratense, Pisum sativum, V. faba) after infestation by non-native clones Additionally, assessed performance species. On M. sativa T. were barely survive or reproduce, triggered strong SA JA-Ile response, whereas with led lower levels both phytohormones. P. clones, which survived reproduced certain extent, induced fluctuating levels, clone only weak response. faba low initially, clone-specific patterns later on. active JA-pathway metabolites showed many cases similar patterns, suggesting reduction JA signaling was due an effect upstream OPDA. ABA downregulated clone-plant combinations therefore probably not decisive factors for aphid-plant compatibility. Our results suggest A. pisum manipulate plant-defense own advantage, perform better ability modulate SA- JA-defense pathways.