title: Memory of plant communications for priming anti-herbivore responses.
abstract: The emission of a specific blend of volatiles in response to Mythimna separata (herbivore-induced plant volatiles, HIPVs) plays a great ecological role by priming neighbouring plants. Maize plants placed downwind of infested, conspecific plants showed reduced larval development not only immediately after exposure to HIPVs but also when receiver plants were tested after a time lag of up to 5 days, compared to those exposed to volatiles from uninfested plants and tested after the same time lag. The molecular basis of this plant memory was, in part, the similarly recalled expression of a Bowman-Birk type trypsin inhibitor (TI) gene, in a jasmonic acid induction-independent manner. Moreover, in the promoter region of TI, a suite of methylation sites was found to be demethylated by the HIPV treatment. These findings provide an innovative mechanism for the epigenetic basis of the memory of HIPV-mediated habituation for plant defence.
authors.affiliation: Center for Ecological Research, Kyoto University, Otsu 520-2113, Japan.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Ali
authors.forename: Koichi
authors.initials: K
authors.lastname: Sugimoto
authors.forename: Abdelaziz
authors.initials: A
authors.lastname: Ramadan
authors.forename: Gen-ichiro
authors.initials: G
authors.lastname: Arimura
mesh_terms: D000818:Animals; D003517:Cyclopentanes / Q000494:pharmacology; D019175:DNA Methylation; D018744:DNA, Plant; D060467:Disease Resistance; D057890:Epigenomics; D018506:Gene Expression Regulation, Plant; D060434:Herbivory / Q000187:drug effects* / Q000502:physiology; D007814:Larva / Q000187:drug effects / Q000235:genetics / Q000276:immunology* / Q000469:parasitology; D054883:Oxylipins / Q000494:pharmacology; D010935:Plant Diseases / Q000235:genetics / Q000276:immunology* / Q000469:parasitology / Q000517:prevention & control; D018521:Plant Physiological Phenomena; D010940:Plant Proteins / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism; D011401:Promoter Regions, Genetic / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics; D060888:Real-Time Polymerase Chain Reaction; D020133:Reverse Transcriptase Polymerase Chain Reaction; D055549:Volatile Organic Compounds / Q000494:pharmacology*; D003313:Zea mays / Q000187:drug effects / Q000235:genetics / Q000276:immunology* / Q000469:parasitology
chemical_list: D003517:Cyclopentanes; D018744:DNA, Plant; D054883:Oxylipins; D010940:Plant Proteins; D012333:RNA, Messenger; D055549:Volatile Organic Compounds; C052160:trypsin inhibitor, Zea mays; C011006:jasmonic acid