| Title: | "The broad-leaf herbicide 2,4-dichlorophenoxyacetic acid turns rice into a living trap for a major insect pest and a parasitic wasp" |
| Author(s): | Xin Z; Yu Z; Erb M; Turlings TCJ; Wang B; Qi J; Liu S; Lou Y; |
| Address: | "National Key Laboratory of Rice Biology, Institute of Insect Science, Zhejiang University, Hangzhou 310029, China. Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knoll-Str. 8, 07745, Jena, Germany. Laboratory of Fundamental and Applied Research in Chemical Ecology, Institute of Biology, University of Neuchatel, Rue Emile-Argand 11, CP158, CH-2009, Neuchatel, Switzerland" |
| DOI: | 10.1111/j.1469-8137.2012.04057.x |
| ISSN/ISBN: | 1469-8137 (Electronic) 0028-646X (Linking) |
| Abstract: | "Synthetic chemical elicitors of plant defense have been touted as a powerful means for sustainable crop protection. Yet, they have never been successfully applied to control insect pests in the field. We developed a high-throughput chemical genetics screening system based on a herbivore-induced linalool synthase promoter fused to a beta-glucuronidase (GUS) reporter construct to test synthetic compounds for their potential to induce rice defenses. We identified 2,4-dichlorophenoxyacetic acid (2,4-D), an auxin homolog and widely used herbicide in monocotyledonous crops, as a potent elicitor of rice defenses. Low doses of 2,4-D induced a strong defensive reaction upstream of the jasmonic acid and ethylene pathways, resulting in a marked increase in trypsin proteinase inhibitor activity and volatile production. Induced plants were more resistant to the striped stem borer Chilo suppressalis, but became highly attractive to the brown planthopper Nilaparvata lugens and its main egg parasitoid Anagrus nilaparvatae. In a field experiment, 2,4-D application turned rice plants into living traps for N. lugens by attracting parasitoids. Our findings demonstrate the potential of auxin homologs as defensive signals and show the potential of the herbicide to turn rice into a selective catch crop for an economically important pest" |
| Keywords: | "2, 4-Dichlorophenoxyacetic Acid/*toxicity Animals Cyclopentanes/metabolism Ethylenes/metabolism Gene Expression Regulation, Plant/drug effects Herbicides/*toxicity Herbivory/drug effects High-Throughput Screening Assays Insecticide Resistance/drug effects;" |
| Notes: | "MedlineXin, Zhaojun Yu, Zhaonan Erb, Matthias Turlings, Ted C J Wang, Baohui Qi, Jinfeng Liu, Shengning Lou, Yonggen eng Research Support, Non-U.S. Gov't England 2012/02/09 New Phytol. 2012 Apr; 194(2):498-510. doi: 10.1111/j.1469-8137.2012.04057.x. Epub 2012 Feb 7" |
