title: Possible role of phytocassane, rice phytoalexin, in disease resistance of rice against the blast fungus Magnaporthe grisea.
abstract: In addition to momilactone, phytocassanes A through E (diterpene phytoalexins) were detected in rice leaves in fields suffering from rice blast. Furthermore, phytocassane accumulation was most abundant at the edges of necrotic lesions, indicating that the phytoalexins prevent subsequent spread of the fungus from the infected site. In pot experiments the pattern of phytocassane accumulation in rice leaves in an incompatible interaction (infection with an avirulent race of Magnaporthe grisea) was more rapidly induced than in a compatible interaction (infection with a virulent race of M. grisea).
authors.affiliation: Health & Bioscience Laboratories, Meiji Seika Kaisha Ltd., 5-3-1 Chiyoda, Sakado, Saitama 350-0289, Japan. kenji_umemura@meiji.co.jp
authors.forename: Kenji
authors.initials: K
authors.lastname: Umemura
authors.forename: Noriko
authors.initials: N
authors.lastname: Ogawa
authors.forename: Masaru
authors.initials: M
authors.lastname: Shimura
authors.forename: Jinichiro
authors.initials: J
authors.lastname: Koga
authors.forename: Hideki
authors.initials: H
authors.lastname: Usami
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Kono
mesh_terms: D000890:Anti-Infective Agents / Q000494:pharmacology*; D004224:Diterpenes / Q000378:metabolism; D007113:Immunity, Innate / Q000187:drug effects; D020082:Magnaporthe / Q000187:drug effects*; D012275:Oryza / Q000737:chemistry* / Q000382:microbiology; D010935:Plant Diseases / Q000382:microbiology*; D010936:Plant Extracts / Q000032:analysis / Q000096:biosynthesis* / Q000494:pharmacology; D018515:Plant Leaves / Q000737:chemistry; D012717:Sesquiterpenes; D013729:Terpenes; D000094162:Phytoalexins
chemical_list: D000890:Anti-Infective Agents; D004224:Diterpenes; D010936:Plant Extracts; D012717:Sesquiterpenes; D013729:Terpenes; D000094162:Phytoalexins