| Title: | Differential Costs of Two Distinct Resistance Mechanisms Induced by Different Herbivore Species in Arabidopsis |
| Author(s): | Onkokesung N; Reichelt M; van Doorn A; Schuurink RC; Dicke M; |
| Address: | "Laboratory of Entomology, Wageningen University, 6700AA Wageningen, The Netherlands (N.O., M.D.);Department of Biochemistry, Max Planck Institute for Chemical Ecology, D-07745 Jena, Germany (M.R.);Keygene, 6708OW, Wageningen, The Netherlands (A.v.D.); andPlant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098XH Amsterdam, The Netherlands (A.v.D., R.C.S.). Laboratory of Entomology, Wageningen University, 6700AA Wageningen, The Netherlands (N.O., M.D.);Department of Biochemistry, Max Planck Institute for Chemical Ecology, D-07745 Jena, Germany (M.R.);Keygene, 6708OW, Wageningen, The Netherlands (A.v.D.); andPlant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098XH Amsterdam, The Netherlands (A.v.D., R.C.S.) marcel.dicke@wur.nl" |
| ISSN/ISBN: | 1532-2548 (Electronic) 0032-0889 (Print) 0032-0889 (Linking) |
| Abstract: | "Plants respond to herbivory with the induction of resistance, mediated by distinct phytohormonal signaling pathways and their interactions. Phloem feeders are known to induce plant resistance via the salicylic acid pathway, whereas biting-chewing herbivores induce plant resistance mainly via the jasmonate pathway. Here, we show that a specialist caterpillar (biting-chewing herbivore) and a specialist aphid (phloem feeder) differentially induce resistance against Pieris brassicae caterpillars in Arabidopsis (Arabidopsis thaliana) plants. Caterpillar feeding induces resistance through the jasmonate signaling pathway that is associated with the induction of kaempferol 3,7-dirhamnoside, whereas aphid feeding induces resistance via a novel mechanism involving sinapoyl malate. The role of sinapoyl malate is confirmed through the use of a mutant compromised in the biosynthesis of this compound. Caterpillar-induced resistance is associated with a lower cost in terms of plant growth reduction than aphid-induced resistance. A strong constitutive resistance against P. brassicae caterpillars in combination with a strong growth attenuation in plants of a transfer DNA (T-DNA) insertion mutant of WRKY70 (wrky70) suggest that the WRKY70 transcription factor, a regulator of downstream responses mediated by jasmonate-salicylic acid signaling cross talk, is involved in the negative regulation of caterpillar resistance and in the tradeoff between growth and defense. In conclusion, different mechanisms of herbivore-induced resistance come with different costs, and a functional WRKY70 transcription factor is required for the induction of low-cost resistance" |
| Keywords: | "Animals Aphids/physiology Arabidopsis/genetics/growth & development/*parasitology Arabidopsis Proteins/metabolism Biomass Biosynthetic Pathways/genetics Cyclopentanes/metabolism *Disease Resistance Gene Expression Profiling Gene Expression Regulation, Pla;" |
| Notes: | "MedlineOnkokesung, Nawaporn Reichelt, Michael van Doorn, Arjen Schuurink, Robert C Dicke, Marcel eng Research Support, Non-U.S. Gov't 2015/11/26 Plant Physiol. 2016 Feb; 170(2):891-906. doi: 10.1104/pp.15.01780. Epub 2015 Nov 24" |
