| Title: | Evolution of herbivore-induced early defense signaling was shaped by genome-wide duplications in Nicotiana |
| Author(s): | Zhou W; Brockmoller T; Ling Z; Omdahl A; Baldwin IT; Xu S; |
| Address: | "Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena, Germany. Brigham Young University, Provo, United States" |
| ISSN/ISBN: | 2050-084X (Electronic) 2050-084X (Linking) |
| Abstract: | "Herbivore-induced defenses are widespread, rapidly evolving and relevant for plant fitness. Such induced defenses are often mediated by early defense signaling (EDS) rapidly activated by the perception of herbivore associated elicitors (HAE) that includes transient accumulations of jasmonic acid (JA). Analyzing 60 HAE-induced leaf transcriptomes from closely-related Nicotiana species revealed a key gene co-expression network (M4 module) which is co-activated with the HAE-induced JA accumulations but is elicited independently of JA, as revealed in plants silenced in JA signaling. Functional annotations of the M4 module were consistent with roles in EDS and a newly identified hub gene of the M4 module (NaLRRK1) mediates a negative feedback loop with JA signaling. Phylogenomic analysis revealed preferential gene retention after genome-wide duplications shaped the evolution of HAE-induced EDS in Nicotiana. These results highlight the importance of genome-wide duplications in the evolution of adaptive traits in plants" |
| Keywords: | "Cyclopentanes/metabolism *Evolution, Molecular Gene Duplication Gene Expression Profiling Gene Expression Regulation, Plant Genome, Plant Herbivory/*physiology Oxylipins/metabolism *Plant Immunity *Signal Transduction Tobacco/*genetics/*physiology Nicotia;" |
| Notes: | "MedlineZhou, Wenwu Brockmoller, Thomas Ling, Zhihao Omdahl, Ashton Baldwin, Ian T Xu, Shuqing eng 293926/ERC_/European Research Council/International Research Support, Non-U.S. Gov't England 2016/11/05 Elife. 2016 Nov 4; 5:e19531. doi: 10.7554/eLife.19531" |
