Document Detail

Generalist insects behave in a jasmonate-dependent manner on their host plants, leaving induced areas quickly and staying longer on distant parts.
MedLine Citation:
PMID:  23390101     Owner:  NLM     Status:  MEDLINE    
Plants are sessile, so have evolved sensitive ways to detect attacking herbivores and sophisticated strategies to effectively defend themselves. Insect herbivory induces synthesis of the phytohormone jasmonic acid which activates downstream metabolic pathways for various chemical defences such as toxins and digestion inhibitors. Insects are also sophisticated animals, and many have coevolved physiological adaptations that negate this induced plant defence. Insect behaviour has rarely been studied in the context of induced plant defence, although behavioural adaptation to induced plant chemistry may allow insects to bypass the host's defence system. By visualizing jasmonate-responsive gene expression within whole plants, we uncovered spatial and temporal limits to the systemic spread of plant chemical defence following herbivory. By carefully tracking insect movement, we found induced changes in plant chemistry were detected by generalist Helicoverpa armigera insects which then modified their behaviour in response, moving away from induced parts and staying longer on uninduced parts of the same plant. This study reveals that there are plant-wide signals rapidly generated following herbivory that allow insects to detect the heterogeneity of plant chemical defences. Some insects use these signals to move around the plant, avoiding localized sites of induction and staying ahead of induced toxic metabolites.
Lynda E Perkins; Bronwen W Cribb; Philip B Brewer; Jim Hanan; Murray Grant; Marta de Torres; Myron P Zalucki
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2013-02-06
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  280     ISSN:  1471-2954     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-02-07     Completed Date:  2013-09-16     Revised Date:  2014-10-14    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  20122646     Citation Subset:  IM    
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MeSH Terms
Arabidopsis / genetics,  metabolism,  physiology*
Arabidopsis Proteins / genetics
Base Sequence
Basic Helix-Loop-Helix Leucine Zipper Transcription Factors / genetics
Behavior, Animal
Cyclopentanes / metabolism*
Gene Expression Regulation, Plant
Insects / physiology
Lepidoptera / physiology*
Molecular Sequence Data
Moths / physiology*
Oxylipins / metabolism*
Plant Leaves / physiology
Plants, Genetically Modified
Repressor Proteins / genetics
Grant Support
BB/C514115/1//Biotechnology and Biological Sciences Research Council
Reg. No./Substance:
0/Arabidopsis Proteins; 0/Basic Helix-Loop-Helix Leucine Zipper Transcription Factors; 0/Cyclopentanes; 0/JAZ1 protein, Arabidopsis; 0/MYC2 protein, Arabidopsis; 0/Oxylipins; 0/Repressor Proteins; 6RI5N05OWW/jasmonic acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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