« Previous AbstractElevated carbon dioxide reduces emission of herbivore-induced volatiles in Zea mays    Next AbstractContrasting insect attraction and herbivore-induced plant volatile production in maize »

J Exp Bot

Title:		Herbivore-derived fatty-acid amides elicit reactive oxygen species burst in plants
Author(s):		Block A; Christensen SA; Hunter CT; Alborn HT;
Address:		"Center for Medical, Agricultural and Veterinary Entomology, US Department of Agriculture-Agricultural Research Service, Gainesville, FL, USA"
Journal Title:		J Exp Bot
Year:		2018
Volume:		69
Issue:		5
Page Number:		1235 - 1245
DOI:		10.1093/jxb/erx449
ISSN/ISBN:		1460-2431 (Electronic) 0022-0957 (Linking)
Abstract:		"Reactive oxygen species (ROS) can be elicited by many forms of stress, including pathogen attack, abiotic stress, damage and insect infestation. Perception of microbe- or damage-associated elicitors triggers an ROS burst in many plant species; however, the impact of herbivore fatty-acid amides on ROS elicitation remains largely unexplored. In this study we show that the lepidopteran-derived fatty-acid amide elicitor N-linolenoyl-L-glutamine (GLN18:3) can induce a ROS burst in multiple plant species. Furthermore, in Arabidopsis this ROS burst is partially dependent on the plasma membrane localized NADPH oxidases RBOHD and RBOHF, and an Arabidopsis rbohD/F double mutant produces enhanced GLN18:3-induced jasmonic acid. Quantification of GLN18:3-induced ROS in phytohormone-deficient lines revealed that in Arabidopsis reduced levels of jasmonic acid resulted in a larger elicitor-induced ROS burst, while in tomato reduction of either jasmonic acid or salicylic acid led to higher induced ROS production. These data indicate that GLN18:3-induced ROS is antagonistic to jasmonic acid production in these species. In biological assays, rbohD/F mutant plants were more resistant to the generalist herbivores Spodoptera exigua and Trichoplusia ni but not to the specialist Plutella xylostella. Collectively, these results demonstrate that in Arabidopsis herbivore-induced ROS may negatively regulate plant defense responses to herbivory"
Keywords:		Amides/*metabolism Animals Arabidopsis/*physiology Arabidopsis Proteins/metabolism Fatty Acids Food Chain *Herbivory Solanum lycopersicum/*physiology *Moths NADPH Oxidases/metabolism Reactive Oxygen Species/*metabolism Spodoptera;
Notes:		"MedlineBlock, Anna Christensen, Shawn A Hunter, Charles T Alborn, Hans T eng Research Support, U.S. Gov't, Non-P.H.S. England 2018/01/05 J Exp Bot. 2018 Feb 23; 69(5):1235-1245. doi: 10.1093/jxb/erx449"