Isopentylamine is a novel defence compound induced by insect feeding in rice
| Autor: | Tetsuya Murayama, Ayami Nishimura, Atsushi Ishihara, Chiaki Iitsuka, Masayoshi Teraishi, Takako Aboshi, Ivan Galis, Marina Kamo, Naoki Mori |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Physiology media_common.quotation_subject Plant Science Insect Cyclopentanes Moths 01 natural sciences Hemiptera 03 medical and health sciences chemistry.chemical_compound Plant Growth Regulators Botany Animals Jasmonate Oxylipins Amines Secondary metabolism media_common Abiotic component biology Jasmonic acid food and beverages Oryza Biotic stress biology.organism_classification Plant Leaves 030104 developmental biology chemistry Seedlings Plant Defense Against Herbivory Brown planthopper Plant hormone 010606 plant biology & botany |
| Zdroj: | Plant, cellenvironmentREFERENCES. 44(1) |
| ISSN: | 1365-3040 |
| Popis: | Plants produce a broad variety of defensive metabolites to protect themselves against herbivorous insects. Although polyamines have been implicated in various responses to abiotic and biotic stress, there have been no studies focused on amines in response to insect herbivory. By screening for bioactive amines, we identified isopentylamine as a novel type of herbivory-induced compound in rice leaves, which was derived from the amino acid leucine in stable isotope labelling experiments. Accumulation of isopentylamine increased during herbivory by the brown planthopper (Nilaparvata lugens, BPH) and the rice-feeding armyworm (Mythimna loreyi), as well as in response to treatment with the plant hormone, jasmonic acid. Likewise, isopentylamine accumulation was compromised in rice jasmonate biosynthesis mutants, hebiba and Osjar1. In bio-assays, BPH insects feeding on rice seedlings submerged in 50 mg/L isopentylamine solution had a higher mortality compared with BPH feeding on seedlings submerged in water. Notably, the rice leaves submerged in 50 mg/L solution showed the endogenous concentrations of isopentylamine similar to that induced by BPHs. These results suggest that isopentylamine functions as a new type of plant defence metabolite that is rapidly induced by herbivore attack and deters insect herbivores in rice. |
| Databáze: | OpenAIRE |
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