| Title: | "The plastidial metabolite 2-C-methyl-D-erythritol-2,4-cyclodiphosphate modulates defence responses against aphids" |
| Author(s): | Onkokesung N; Reichelt M; Wright LP; Phillips MA; Gershenzon J; Dicke M; |
| Address: | "Laboratory of Entomology, Wageningen University, Wageningen, The Netherlands. Department of Biochemistry, Max Planck Institute for Chemical Ecology, Jena, Germany. Department of Biology and Graduate Program in Cellular and Systems Biology, University of Toronto-Mississauga, Mississauga, Ontario, Canada" |
| ISSN/ISBN: | 1365-3040 (Electronic) 0140-7791 (Print) 0140-7791 (Linking) |
| Abstract: | "Feeding by insect herbivores such as caterpillars and aphids induces plant resistance mechanisms that are mediated by the phytohormones jasmonic acid (JA) and salicylic acid (SA). These phytohormonal pathways often crosstalk. Besides phytohormones, methyl-D-erythriol-2,4-cyclodiphosphate (MEcPP), the penultimate metabolite in the methyl-D-erythritol-4-phosphate pathway, has been speculated to regulate transcription of nuclear genes in response to biotic stressors such as aphids. Here, we show that MEcPP uniquely enhances the SA pathway without attenuating the JA pathway. Arabidopsis mutant plants that accumulate high levels of MEcPP (hds3) are highly resistant to the cabbage aphid (Brevicoryne brassicae), whereas resistance to the large cabbage white caterpillar (Pieris brassicae) remains unaltered. Thus, MEcPP is a distinct signalling molecule that acts beyond phytohormonal crosstalk to induce resistance against the cabbage aphid in Arabidopsis. We dissect the molecular mechanisms of MEcPP mediating plant resistance against the aphid B. brassicae. This shows that MEcPP induces the expression of genes encoding enzymes involved in the biosynthesis of several primary and secondary metabolic pathways contributing to enhanced resistance against this aphid species. A unique ability to regulate multifaceted molecular mechanisms makes MEcPP an attractive target for metabolic engineering in Brassica crop plants to increase resistance to cabbage aphids" |
| Keywords: | Animals Aphids/*drug effects Arabidopsis/genetics/*metabolism Arabidopsis Proteins/genetics/metabolism Brassica Cyclopentanes/metabolism Cytochrome P-450 Enzyme System/metabolism Disease Resistance/genetics/physiology Erythritol/*analogs & derivatives/gen; |
| Notes: | "MedlineOnkokesung, Nawaporn Reichelt, Michael Wright, Louwrance P Phillips, Michael A Gershenzon, Jonathan Dicke, Marcel eng 2019/02/21 Plant Cell Environ. 2019 Jul; 42(7):2309-2323. doi: 10.1111/pce.13538. Epub 2019 Mar 8" |
