| Title: | "OsLRR-RLK1, an early responsive leucine-rich repeat receptor-like kinase, initiates rice defense responses against a chewing herbivore" |
| Author(s): | Hu L; Ye M; Kuai P; Ye M; Erb M; Lou Y; |
| Address: | "State Key Laboratory of Rice Biology & Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, 310058, Hangzhou, China. Institute of Plant Sciences, University of Bern, 3013, Bern, Switzerland" |
| ISSN/ISBN: | 1469-8137 (Electronic) 0028-646X (Linking) |
| Abstract: | "Plants are constantly exposed to a variety of environmental stresses, including herbivory. How plants perceive herbivores on a molecular level is poorly understood. Leucine-rich repeat receptor-like kinases (LRR-RLKs), the largest subfamily of RLKs, are essential for plants to detect external stress signals, and may therefore also be involved in herbivore perception. Here, we employed RNA interference silencing, phytohormone profiling and complementation, as well as herbivore resistance assays, to investigate the requirement of an LRR-RLK for the initiation of rice (Oryza sativa) defenses against the chewing herbivore striped stem borer (SSB) Chilo suppressalis. We discovered a plasma membrane-localized LRR-RLK, OsLRR-RLK1, whose transcription is strongly up-regulated by SSB attack and treatment with oral secretions of Spodoptera frugiperda. OsLRR-RLK1 acts upstream of mitogen-activated protein kinase (MPK) cascades, and positively regulates defense-related MPKs and WRKY transcription factors. Moreover, OsLRR-RLK1 is a positive regulator of SSB-elicited, but not wound-elicited, levels of jasmonic acid and ethylene, trypsin protease inhibitor activity and plant resistance towards SSB. OsLRR-RLK1 therefore plays an important role in herbivory-induced defenses of rice. Given the well-documented role of LRR-RLKs in the perception of stress-related molecules, we speculate that OsLRR-RLK1 may be involved in the perception of herbivory-associated molecular patterns" |
| Keywords: | "Animals Cyclopentanes/metabolism Disease Resistance/immunology Ethylenes/biosynthesis Gene Expression Regulation, Plant Gene Silencing *Herbivory Lepidoptera/*physiology Leucine-Rich Repeat Proteins *Mastication Oryza/*enzymology/genetics/*parasitology Ox;" |
| Notes: | "MedlineHu, Lingfei Ye, Meng Kuai, Peng Ye, Miaofen Erb, Matthias Lou, Yonggen eng Research Support, Non-U.S. Gov't England 2018/06/08 New Phytol. 2018 Aug; 219(3):1097-1111. doi: 10.1111/nph.15247. Epub 2018 Jun 7" |
