2012 Fiscal Year Final Research Report
Cell proliferation-controlling system as fundamental to de novo formation of shoot and root apical meristems
| Project Area | Plant regulatory systems that control developmental interactions between meristems and lateral organs |
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| Project/Area Number |
19060001
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Biological Sciences
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
OHTANI Misato 理化学研究所, バイオマス工学研究プログラム, 研究員 (60435633)
IWAMOTO Akitoshi 東京学芸大学, 教育学部, 助教 (60434388)
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| Project Period (FY) |
2007 – 2012
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| Keywords | メリステム / 細胞増殖 / シュート再生 / 側根原基 / プレmRNAスプライシング / rRNA生合成 / ミトコンドリア / mRNA代謝 |
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| Research Abstract |
Cell proliferation-controlling systems prerequisite for meristem neoformation were studied by the molecular genetic analysis with Arabidopsis mutants temperature-sensitive for organogenesis de novo, which showed that uneven decrease of rRNA biosynthesis gene expression leads to the restriction of cell proliferation to small areas during shoot regeneration and that mitochondrial mRNA metabolism is involved in the termination of formative cell division at the initiation of lateral root primordia. Our original mathematical model linking cell proliferation and volume growth was revised to fit the actual profiles of root apical growth.
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