title: Red/Far Red Light Controls Arbuscular Mycorrhizal Colonization via Jasmonic Acid and Strigolactone Signaling.
abstract: Establishment of a nitrogen-fixing symbiosis between legumes and rhizobia not only requires sufficient photosynthate, but also the sensing of the ratio of red to far red (R/FR) light. Here, we show that R/FR light sensing also positively influences the arbuscular mycorrhizal (AM) symbiosis of a legume and a non-legume through jasmonic acid (JA) and strigolactone (SL) signaling. The level of AM colonization in high R/FR light-grown tomato and Lotus japonicus significantly increased compared with that determined for low R/FR light-grown plants. Transcripts for JA-related genes were also elevated under high R/FR conditions. The root exudates derived from high R/FR light-grown plants contained more (+)-5-deoxystrigol, an AM-fungal hyphal branching inducer, than those from low R/FR light-grown plants. In summary, high R/FR light changes not only the levels of JA and SL synthesis, but also the composition of plant root exudates released into the rhizosphere, in this way augmenting the AM symbiosis.
authors.affiliation: Department of Agro-Environmental Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, 840-8502 Japan.
authors.forename: Maki
authors.initials: M
authors.lastname: Nagata
authors.affiliation: Department of Agro-Environmental Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, 840-8502 Japan.
authors.forename: Naoya
authors.initials: N
authors.lastname: Yamamoto
authors.affiliation: Department of Agro-Environmental Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, 840-8502 Japan.
authors.forename: Tamaki
authors.initials: T
authors.lastname: Shigeyama
authors.affiliation: Department of Agro-Environmental Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, 840-8502 Japan.
authors.forename: Yohei
authors.initials: Y
authors.lastname: Terasawa
authors.affiliation: Department of Agro-Environmental Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, 840-8502 Japan United Graduate School of Agricultural Sciences, Kagoshima University, Korimoto, Kagoshima, 890-0065 Japan.
authors.forename: Toyoaki
authors.initials: T
authors.lastname: Anai
authors.affiliation: Graduate School of Science and Technology, Niigata University, Nishiku, Niigata, 950-2181 Japan.
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Sakai
authors.affiliation: RIKEN Plant Science Center, Yokohama, Kanagawa, 230-0045 Japan.
authors.forename: Sayaka
authors.initials: S
authors.lastname: Inada
authors.affiliation: Department of Agro-Environmental Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, 840-8502 Japan United Graduate School of Agricultural Sciences, Kagoshima University, Korimoto, Kagoshima, 890-0065 Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Arima
authors.affiliation: Frontier Science Research Center, University of Miyazaki, Miyazaki, Miyazaki, 889-2192 Japan.
authors.forename: Masatsugu
authors.initials: M
authors.lastname: Hashiguchi
authors.affiliation: Frontier Science Research Center, University of Miyazaki, Miyazaki, Miyazaki, 889-2192 Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Akashi
authors.affiliation: Saga Prefectural Institute of Public Health and Pharmaceutical Research, Saga, 849-8585 Japan.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Nakayama
authors.affiliation: Department of Agro-Environmental Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, 840-8502 Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Ueno
authors.affiliation: Department of Molecular, Cell and Developmental Biology and Molecular Biology Institute, University of California-Los Angeles, 621 Charles E. Young Drive South, Los Angeles CA 90095-1606, USA.
authors.forename: Ann M
authors.initials: AM
authors.lastname: Hirsch
authors.affiliation: Department of Agro-Environmental Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, 840-8502 Japan United Graduate School of Agricultural Sciences, Kagoshima University, Korimoto, Kagoshima, 890-0065 Japan azuki@cc.saga-u.ac.jp.
authors.forename: Akihiro
authors.initials: A
authors.lastname: Suzuki
mesh_terms: D003517:Cyclopentanes / Q000378:metabolism*; D017343:Genes, Plant; D007783:Lactones / Q000378:metabolism*; D008027:Light; D000070116:Lotus / Q000382:microbiology* / Q000502:physiology; D018551:Solanum lycopersicum / Q000382:microbiology* / Q000502:physiology; D038821:Mycorrhizae / Q000502:physiology*; D054883:Oxylipins / Q000378:metabolism*; D015398:Signal Transduction; D012988:Soil Microbiology; D013559:Symbiosis
chemical_list: D003517:Cyclopentanes; D007783:Lactones; D054883:Oxylipins; C011006:jasmonic acid
keywords: Arbuscular mycorrhizal symbiosis; Jasmonic acid; Lotus japonicus; Red/far red light ratio; Solanum lycopersicum cv. Micro-Tom; Strigolactone