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Photosynthesis Research

, Volume 85, Issue 2, pp 149–159 | Cite as

Elicitors and priming agents initiate plant defense responses

  • Paul W. ParéEmail author
  • Mohamed A. Farag
  • Venkat Krishnamachari
  • Huiming Zhang
  • Choong-Min Ryu
  • Joseph W. Kloepper
Review

Abstract

Biotic elicitors produced by plant pathogens or herbivore pests rapidly activate a range of plant chemical defenses when translocated to plant tissue. The fatty acid conjugate volicitin has proven to be a robust elicitor model for studying herbivore-induced plant defense responses. Here we review the role of insect-derived volicitin (N-[17-hydroxylinolenoyl]-L-glutamine) as an authentic elicitor of defense responses, specifically as an activator of signal volatiles that attract natural enemies of herbivore pests. Comparisons are drawn between volicitin as an elicitor of plant defenses and two other classes of signaling molecules, C6 green-leaf volatiles and C4 bacterial volatiles that appear to prime plant defenses thereby enhancing the capacity to mobilize cellular defense responses when a plant is faced with herbivore or pathogen attack.

Keywords

chemical elicitors plant defense responses plant volatile emissions priming agents volicitin 

Abbreviations

ADH

alcohol dehydrogenase

BAW

beet armyworm (Spodoptera exigua)

FACs

fatty acid conjugates

HPL

hydroperoxide lyase

HPLC

high performance liquid chromatography

IF

isom-erization factor

ISR

induced systemic resistance

JA

jasmonic acid

LOX

lipoxygenase

MeJA

met-hyl jasmonate

PAL

phenylalanine ammonia lyase

PGPR

plant growth promoting rhizobacteria

SAR

systemic acquired resistance

VOCs

volatile organic compounds

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Copyright information

© Springer 2005

Authors and Affiliations

  • Paul W. Paré
    • 1
    Email author
  • Mohamed A. Farag
    • 2
  • Venkat Krishnamachari
    • 1
  • Huiming Zhang
    • 1
  • Choong-Min Ryu
    • 3
  • Joseph W. Kloepper
    • 4
  1. 1.Chemistry & Biochemistry DepartmentTexas Tech UniversityLubbockUSA
  2. 2.Plant Biology DivisionSamuel Roberts Noble FoundationArdmoreUSA
  3. 3.Laboratory of Microbial GenomicsKorean Research Institute of Bioscience and BiotechnologyYusongS. Korea
  4. 4.Department of Entomology & Plant PathologyAuburn UniversityAuburnUSA

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