| Title: | "BSR1, a Rice Receptor-like Cytoplasmic Kinase, Positively Regulates Defense Responses to Herbivory" |
| Author(s): | Kanda Y; Shinya T; Maeda S; Mujiono K; Hojo Y; Tomita K; Okada K; Kamakura T; Galis I; Mori M; |
| Address: | "Institute of Agrobiological Sciences, NARO (NIAS), Tsukuba 305-8634, Japan. Department of Applied Biological Science, Graduate School of Science and Technology, Tokyo University of Science, Noda 278-8510, Japan. Institute of Plant Science and Resources, Okayama University, Kurashiki 710-0046, Japan. Faculty of Agriculture, Mulawarman University, Samarinda 75119, Indonesia. Agro-Biotechnology Research Center, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan" |
| ISSN/ISBN: | 1422-0067 (Electronic) 1422-0067 (Linking) |
| Abstract: | "Crops experience herbivory by arthropods and microbial infections. In the interaction between plants and chewing herbivores, lepidopteran larval oral secretions (OS) and plant-derived damage-associated molecular patterns (DAMPs) trigger plant defense responses. However, the mechanisms underlying anti-herbivore defense, especially in monocots, have not been elucidated. The receptor-like cytoplasmic kinase Broad-Spectrum Resistance 1 (BSR1) of Oryza sativa L. (rice) mediates cytoplasmic defense signaling in response to microbial pathogens and enhances disease resistance when overexpressed. Here, we investigated whether BSR1 contributes to anti-herbivore defense responses. BSR1 knockout suppressed rice responses triggered by OS from the chewing herbivore Mythimna loreyi Duponchel (Lepidoptera: Noctuidae) and peptidic DAMPs OsPeps, including the activation of genes required for biosynthesis of diterpenoid phytoalexins (DPs). BSR1-overexpressing rice plants exhibited hyperactivation of DP accumulation and ethylene signaling after treatment with simulated herbivory and acquired enhanced resistance to larval feeding. As the biological significance of herbivory-induced accumulation of rice DPs remains unexplained, their physiological activities in M. loreyi were analyzed. The addition of momilactone B, a rice DP, to the artificial diet suppressed the growth of M. loreyi larvae. Altogether, this study revealed that BSR1 and herbivory-induced rice DPs are involved in the defense against chewing insects, in addition to pathogens" |
| Keywords: | "Animals *Oryza/metabolism Plant Proteins/genetics/metabolism Herbivory/physiology Signal Transduction *Moths/physiology Plants/metabolism Larva/metabolism Gene Expression Regulation, Plant Pep broad-spectrum resistance chewing herbivore damage-associated;" |
| Notes: | "MedlineKanda, Yasukazu Shinya, Tomonori Maeda, Satoru Mujiono, Kadis Hojo, Yuko Tomita, Keisuke Okada, Kazunori Kamakura, Takashi Galis, Ivan Mori, Masaki eng Switzerland 2023/06/28 Int J Mol Sci. 2023 Jun 20; 24(12):10395. doi: 10.3390/ijms241210395" |
