| Abstract Detail
Plant-Pest Interactions Arevalo, L. Milenka [1], Jia, Lingling [2], Goggin, Fiona [2]. Impact of a Fatty Acid Desaturase, Spr2, on Plant Defenses Against Aphids. Jasmonic acid and its derivatives are induced in response to wounding, and act as local and systemic signals that trigger expression of proteinase inhibitors, polyphenol oxidase, and other compounds that have a defensive function against many insect herbivores. Jasmonates are known to mediate induced resistance against many chewing insects such as caterpillars and cell content feeders such as mites and thrips. It is not known, however, if this pathway is responsive to or effective against piercing-sucking insects such as aphids, which cause far less mechanical damage than other insect feeding guilds. This study assessed population growth of the potato aphid, Macrosiphum euphorbiae, on three mutant lines of tomato (Lycopersicon esculentum) that are deficient in jasmonic acid synthesis or sensitivity, and also quantified expression of marker genes associated with jasmonate induction in response to aphid feeding. The results of this study suggest that jasmonates do not play a major role in limiting aphid infestation in tomato, and that suppression of jasmonic acid synthesis can in some cases actually reduce host suitability for aphids. These findings reflect potential trade-offs in plant defenses against different insect feeding guilds.
Log in to add this item to your schedule
1 - University of Arkansas, Entomology, 319 Agriculture Building, Fayetteville, Arkansas, 72701, United States
2 - University of Arkansas, Entomology
Keywords:
plant-insect interaction.
Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P14016
Abstract ID:862 |
