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Author Peiffer, Michelle ♦ Tooker, John F. ♦ Luthe, Dawn S. ♦ Felton, Gary W.
Source World Health Organization (WHO)-Global Index Medicus
Content type Text
Publisher Wiley
File Format HTM / HTML
Language English
Difficulty Level Medium
Subject Domain (in DDC) Philosophy & psychology ♦ Psychology ♦ Natural sciences & mathematics ♦ Chemistry & allied sciences ♦ Life sciences; biology ♦ Physiology & related subjects ♦ Biochemistry ♦ Genetics and evolution ♦ Natural history of organisms ♦ Microorganisms, fungi & algae ♦ Technology ♦ Medicine & health ♦ Human anatomy, cytology, histology ♦ Human physiology ♦ Incidence & prevention of disease ♦ Pharmacology and therapeutics ♦ Diseases
Subject Domain (in MeSH) Plant Structures ♦ Anatomy ♦ Eukaryota ♦ Organisms ♦ Inorganic Chemicals ♦ Organic Chemicals ♦ Lipids ♦ Amino Acids, Peptides, and Proteins ♦ Nucleic Acids, Nucleotides, and Nucleosides ♦ Chemicals and Drugs ♦ Psychological Phenomena and Processes ♦ Psychiatry and Psychology ♦ Chemical Phenomena ♦ Genetic Phenomena ♦ Microbiological Phenomena ♦ Biological Sciences
Subject Keyword Discipline Botany ♦ Host-pathogen Interactions ♦ Physiology ♦ Lycopersicon Esculentum ♦ Moths ♦ Animals ♦ Base Sequence ♦ Cyclopentanes ♦ Metabolism ♦ Pharmacology ♦ Dna Primers ♦ Genetics ♦ Dna, Plant ♦ Gene Expression Regulation, Plant ♦ Drug Effects ♦ Genes, Plant ♦ Hydrogen Peroxide ♦ Mutation ♦ Oxylipins ♦ Plant Epidermis ♦ Plant Proteins ♦ Signal Transduction ♦ Touch ♦ Journal Article ♦ Research Support, Non-u.s. Gov't ♦ Research Support, U.s. Gov't, Non-p.h.s.
Abstract The ability of caterpillar or moth 'footsteps' to elicit defenses in the tomato (Solanum lycopersicum) plant was examined. Although touch responses frequently have been observed in plants, the role of herbivore 'touch' in eliciting antiherbivore defenses has not been adequately examined. A combination of methods, including in situ hybridization, reverse transcriptase-polymerase chain reaction, quantitative real-time polymerase chain reaction and gas chromatography-mass spectrometry, was used to determine the role of trichomes in mediating these touch responses. Mutants compromised in jasmonic acid and glandular trichomes were used to test whether both of these were required for these touch responses. We demonstrated that the rupture of foliar glandular trichomes by caterpillar or moth contact induced the expression of defense transcripts (e.g. proteinase inhibitor 2, or PIN2) regulated by jasmonic acid. Neither chewing nor the release of salivary components was required to initiate this induced response. Jasmonic acid and the genes encoding proteins involved in its biosynthesis were identified in the trichomes. Using mutants, we showed that both jasmonic acid and trichomes were required for the contact-induced expression of PIN2. In addition, hydrogen peroxide, formed on the leaf surface, was required for PIN2 expression. Because these defenses would be activated before egg hatch, this early detection system for herbivores may be of considerable ecological significance.
Description Country affiliation: United States
Author Affiliation: Peiffer M ( Department of Entomology and Center for Chemical Ecology, The Pennsylvania State University, University Park, PA 16802, USA.)
ISSN 0028646X
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Reading ♦ Research ♦ Self Learning
Interactivity Type Expositive
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2009-11-01
Publisher Place Great Britain (UK)
e-ISSN 14698137
Journal New Phytologist
Volume Number 184
Issue Number 3


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Source: WHO-Global Index Medicus