title: Jasmonic acid, protein phosphatase inhibitor, metals and UV-irradiation increased momilactone A and B concentrations in the moss Hypnum plumaeforme.
abstract: Momilactone A and B have been found only in rice and the moss, Hypnum plumaeforme, although both plants are taxonomically quite distinct. The endogenous concentrations of momilactone A and B in H. plumaeforme were 58.7 and 24.3 microg/g dry weight, respectively. UV-irradiation increased the concentrations of momilactone A and B. The concentrations of momilactone A and B, respectively, became 14- and 15-fold greater than those of non-UV-irradiated control. CuCl2 and FeCl2 (1 mmol/L) treatments also increased momilactone A and B concentrations by 2.7- to 6.1-fold and 2.9- to 6.3-fold, respectively. In addition, the protein phosphatase inhibitor, cantharidin, and jasmonic acid increased momilactone A and B concentrations in H. plumaeforme. Cantharidin acts as an elicitor and jasmonic acid is an important signaling molecule regulating inducible defense genes against the pathogen infection. Momilactone A and B, respectively, were increased 12- and 11-fold by 200 micromol/L cantharidin, and 14- and 15-fold by 100 micromol/L jasmonic acid compared with non-treated controls. As momilactone A and B are phytoalexins, these compounds may play an important role in defense responses against biotic and abiotic stress conditions in H. plumaeforme.
authors.affiliation: Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki, Kagawa 761-0795, Japan. hisashi@ag.kagawa-u.ac.jp
authors.forename: Hisashi
authors.initials: H
authors.lastname: Kato-Noguchi
authors.forename: Kanami
authors.initials: K
authors.lastname: Kobayashi
mesh_terms: D019068:Bryopsida / Q000187:drug effects / Q000378:metabolism / Q000528:radiation effects; D002193:Cantharidin / Q000494:pharmacology*; D003517:Cyclopentanes / Q000494:pharmacology*; D004224:Diterpenes / Q000378:metabolism*; D004791:Enzyme Inhibitors / Q000494:pharmacology; D018506:Gene Expression Regulation, Plant / Q000187:drug effects / Q000528:radiation effects; D007783:Lactones / Q000378:metabolism*; D008670:Metals / Q000494:pharmacology*; D054883:Oxylipins / Q000494:pharmacology*; D014466:Ultraviolet Rays
chemical_list: D003517:Cyclopentanes; D004224:Diterpenes; D004791:Enzyme Inhibitors; D007783:Lactones; D008670:Metals; D054883:Oxylipins; C477203:momilactone B; C116023:momilactone A; C011006:jasmonic acid; D002193:Cantharidin