title: Enhanced hyphal growth of arbuscular mycorrhizae by root exudates derived from high R/FR treated Lotus japonicus.
abstract: Red/Far Red (R/FR) sensing positively influences the arbuscular mycorrhizal (AM) symbiosis of both legume and nonlegume plants through jasmonic acid (JA) and strigolactone signaling. We previously reported that root exudates obtained from high R/FR-grown plants contained more strigolactone than low R/FR-grown plants. To determine whether JA and JA derivatives were secreted from roots, we investigated the expression levels of JA-responsive genes in L. japonicus Miyakojima MG20 plants treated with root exudates prepared from either high or low R/FR light-treated plants. The root exudates from high R/FR light-treated plants were found to enhance the expression levels of JA-responsive genes significantly. Moreover, exogenous JA increased AM fungal hyphal elongation as did the root exudates derived from high R/FR-grown L. japonicus plants. We conclude that increased JA accumulation and secretion into root exudates from high R/FR light-grown plants is the best explanation for increased colonization and enhanced mycorrhization under these conditions.
authors.affiliation: a Department of Agricultural Sciences , Faculty of Agriculture, Saga University , Honjyo-machi, Saga , Japan.
authors.forename: Maki
authors.initials: M
authors.lastname: Nagata
authors.affiliation: a Department of Agricultural Sciences , Faculty of Agriculture, Saga University , Honjyo-machi, Saga , Japan.
authors.forename: Naoya
authors.initials: N
authors.lastname: Yamamoto
authors.affiliation: a Department of Agricultural Sciences , Faculty of Agriculture, Saga University , Honjyo-machi, Saga , Japan.
authors.forename: Taro
authors.initials: T
authors.lastname: Miyamoto
authors.affiliation: a Department of Agricultural Sciences , Faculty of Agriculture, Saga University , Honjyo-machi, Saga , Japan.|b United Graduate School of Agricultural Sciences, Kagoshima University , Kagoshima , Japan.
authors.forename: Aya
authors.initials: A
authors.lastname: Shimomura
authors.affiliation: a Department of Agricultural Sciences , Faculty of Agriculture, Saga University , Honjyo-machi, Saga , Japan.|b United Graduate School of Agricultural Sciences, Kagoshima University , Kagoshima , Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Arima
authors.affiliation: c Department of Molecular , Cell and Developmental Biology and Molecular Biology Institute, University of California-Los Angeles , Los Angeles , CA USA.
authors.forename: Ann M
authors.initials: AM
authors.lastname: Hirsch
authors.affiliation: a Department of Agricultural Sciences , Faculty of Agriculture, Saga University , Honjyo-machi, Saga , Japan.|b United Graduate School of Agricultural Sciences, Kagoshima University , Kagoshima , Japan.
authors.forename: Akihiro
authors.initials: A
authors.lastname: Suzuki
mesh_terms: D003517:Cyclopentanes / Q000494:pharmacology; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D017343:Genes, Plant; D025301:Hyphae / Q000187:drug effects / Q000254:growth & development*; D008027:Light; D000070116:Lotus / Q000187:drug effects / Q000235:genetics / Q000382:microbiology* / Q000528:radiation effects*; D038821:Mycorrhizae / Q000187:drug effects / Q000254:growth & development*; D054883:Oxylipins / Q000494:pharmacology; D053147:Plant Exudates / Q000494:pharmacology*; D018517:Plant Roots / Q000382:microbiology* / Q000528:radiation effects*
chemical_list: D003517:Cyclopentanes; D054883:Oxylipins; D053147:Plant Exudates; C011006:jasmonic acid
keywords: Arbuscular mycorrhizal fungi; jasmonic acid; root exudate