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2014 Fiscal Year Final Research Report

Evolutionary basis from arbuscular mycorrhizal symbiosis and root nodule symbiosis

Planned

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Project AreaGenetic bases for the evolution of complex adaptive traits
Project/Area Number 22128006
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionNational Institute for Basic Biology

Principal Investigator

KAWAGUCHI Masayoshi  基礎生物学研究所, 共生ステム研究部門, 教授 (30260508)

Co-Investigator(Kenkyū-buntansha) SAITO Katsuharu  信州大学, 農学部, 准教授 (40444244)
Co-Investigator(Renkei-kenkyūsha) TAKEDA Naoya  基礎生物学研究所, 共生システム研究部門, 助教 (60571081)
SUZAKI Takuya  基礎生物学研究所, 共生システム研究部門, 助教 (40575825)
Research Collaborator FUJITA Hironori  
HANDA Yoshihiro  
KOBAYASHI Yuki  
SASAKI Takema  
YORO Emiko  
TAKAHARA Masahiro  
YOSHIDA Chie  
OKAMOTO Satoru  
MIYAZAWA Hikota  
SHINOHARA Hidefumi  
MATSUBAYASHI Yoshikatsu  
SOYANO Takashi  
SAKAKIBARA Hitoshi  
HAYASHI Makoto  
SUGANUMA Norio  
YAMADA Akiyoshi  
EZAWA Tatsuhiro  
Project Period (FY) 2010-04-01 – 2015-03-31
Keywords共生 / 進化 / 根粒 / アーバスキュラー菌根菌 / 茎頂メリステム / 数理解析 / ゲノム解読
Outline of Final Research Achievements

Through the molecular genetic analyses using a model legume Lotus japonicus, we provided additional evidence for the existence of common genetic regulatory mechanisms for nodule formation and shoot apical meristem (SAM) development. Besides, mathematical modeling showed that the reaction-diffusion dynamics is probably required for the SAM development. Nodule and its regulatory system might have been evolved in part by co-opting a gene network of the self-organized SAM development.

Genomes of an arbuscular mycorrhizal (AM) fungus and Endogonales fungi were decoded. Diversification of kinase-like genes was found in the symbiont genomes, indicating existence of signal transduction pathways that are required for symbiotic interaction between the fungi and the host plants. Transcriptome analysis of AM fungi and plants during AM development suggests that the symbiotic association is maintained by mutual complementation of metabolites such as fatty acids and phosphate between them.

Free Research Field

植物発生遺伝学

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Published: 2016-06-03  

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