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Herbivore-derived fatty-acid amides elicit reactive oxygen species burst in plants.
Block, Anna; Christensen, Shawn A; Hunter, Charles T; Alborn, Hans T.
Affiliation
  • Block A; Center for Medical, Agricultural and Veterinary Entomology, US Department of Agriculture-Agricultural Research Service, Gainesville, FL, USA.
  • Christensen SA; Center for Medical, Agricultural and Veterinary Entomology, US Department of Agriculture-Agricultural Research Service, Gainesville, FL, USA.
  • Hunter CT; Center for Medical, Agricultural and Veterinary Entomology, US Department of Agriculture-Agricultural Research Service, Gainesville, FL, USA.
  • Alborn HT; Center for Medical, Agricultural and Veterinary Entomology, US Department of Agriculture-Agricultural Research Service, Gainesville, FL, USA.
J Exp Bot ; 69(5): 1235-1245, 2018 02 23.
Article in En | MEDLINE | ID: mdl-29301018
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.
Subject(s)

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Reactive Oxygen Species / Arabidopsis / Solanum lycopersicum / Herbivory / Amides / Moths Limits: Animals Language: En Journal: J Exp Bot Journal subject: BOTANICA Year: 2018 Type: Article Affiliation country: United States

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Reactive Oxygen Species / Arabidopsis / Solanum lycopersicum / Herbivory / Amides / Moths Limits: Animals Language: En Journal: J Exp Bot Journal subject: BOTANICA Year: 2018 Type: Article Affiliation country: United States