2014 Fiscal Year Final Research Report
Evolutionary basis from arbuscular mycorrhizal symbiosis and root nodule symbiosis
|Project Area||Genetic bases for the evolution of complex adaptive traits|
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
|Allocation Type||Single-year Grants |
|Research Institution||National Institute for Basic Biology |
SAITO Katsuharu 信州大学, 農学部, 准教授 (40444244)
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)
|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