Comparing induction at an early and late step in signal transduction mediating indirect defence in Brassica oleracea
| Autor: | Marcel Dicke, Bao‐ping Pang, Joop J. A. van Loon, Maaike Bruinsma, Roland Mumm |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
0106 biological sciences
Physiology insect herbivory Defence mechanisms Plant Science 01 natural sciences salicylate chemistry.chemical_compound Eating Arabidopsis thaliana Jasmonate Laboratory of Entomology parasitoid host-location behaviour 0303 health sciences biology octadecanoid pathway EPS-2 Jasmonic acid Trichoderma viride food and beverages Research Papers Lepidoptera Brassica oleracea Octadecanoid pathway cross-talk Cotesia glomerata Signal Transduction cotesia-glomerata arabidopsis-thaliana volatile emission Cyclopentanes tendril coiling 03 medical and health sciences Species Specificity Botany Animals Oxylipins Alamethicin 030304 developmental biology pieris caterpillars jasmonic acid fungi Brussels sprouts biology.organism_classification Laboratorium voor Entomologie gene-expression Hymenoptera jasmonate plant-volatile biosynthesis salicylic-acid chemistry Brassicaceae peptaibol Volatilization Salicylic acid 010606 plant biology & botany |
| Zdroj: | Journal of Experimental Botany Journal of Experimental Botany 60 (2009) 9 Journal of Experimental Botany, 60(9), 2589-2599 |
| ISSN: | 1460-2431 0022-0957 |
| Popis: | The induction of plant defences involves a sequence of steps along a signal transduction pathway, varying in time course. In this study, the effects of induction of an early and a later step in plant defence signal transduction on plant volatile emission and parasitoid attraction are compared. Ion channel-forming peptides represent a class of inducers that induce an early step in signal transduction. Alamethicin (ALA) is an ion channel-forming peptide mixture from the fungus Trichoderma viride that can induce volatile emission and increase endogenous levels of jasmonic acid (JA) and salicylic acid in plants. ALA was used to induce an early step in the defence response in Brussels sprouts plants, Brassica oleracea var. gemmifera, and to study the effect on volatile emission and on the behavioural response of parasitoids to volatile emission. The parasitoid Cotesia glomerata was attracted to ALA-treated plants in a dose-dependent manner. JA, produced through the octadecanoid pathway, activates a later step in induced plant defence signal transduction, and JA also induces volatiles that are attractive to parasitoids. Treatment with ALA and JA resulted in distinct volatile blends, and both blends differed from the volatile blends emitted by control plants. Even though JA treatment of Brussels sprouts plants resulted in higher levels of volatile emission, ALA-treated plants were as attractive to C. glomerata as JA-treated plants. This demonstrates that on a molar basis, ALA is a 20 times more potent inducer of indirect plant defence than JA, although this hormone has more commonly been used as a chemical inducer of plant defence. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|