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2021 Fiscal Year Final Research Report

Understanding florigen function by identifying direct regulatory targets in the rice shoot apical meristem

Research Project

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Project/Area Number 19K15818
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 39010:Science in plant genetics and breeding-related
Research InstitutionNagoya University (2020-2021)
Yokohama City University (2019)

Principal Investigator

Higo Asuka  名古屋大学, 高等研究院(遺伝子), 特任助教 (70812387)

Project Period (FY) 2019-04-01 – 2022-03-31
Keywords茎頂分裂組織 / 花成 / 花成ホルモン
Outline of Final Research Achievements

I aimed to comprehensively identify regulatory targets of florigen in the SAM, the site of florigen function to clarify the details of floral transition induction mechanisms, I tried to apply omics analysis approach with limited materials to rice from which shoot apical meristem (SAM) containing stem cells of above-ground plant tissues can be isolated with high purity. In this study, I first analyzed DNA methylation dynamics in the SAM to characterize the epigenomic dynamics during floral transition and published the results in a paper. Next, I performed the transcriptome analysis in a single SAM at various developmental stages before and after floral transition by using the Cel-seq2 method and obtained the transcriptome data with higher temporal resolution than existing ones.

Free Research Field

植物発生学

Academic Significance and Societal Importance of the Research Achievements

本研究によりSAMでの花成誘導に特徴的なエピゲノム動態を見出したことから、エピゲノム動態という新たな視点からの花成研究の切り口を提示すつこととなった。また、本研究で得られたトランスクリプトームデータは、既存のデータよりも時間分解能が高いことから、これまで着目されていなかった花成開始関連遺伝子が同定されることが期待される。このような新規の制御点・制御遺伝子は、花成を人工的に操作する化合物等のスクリーニングの新規標的となりうることから、これまでとは異なる花成制御物質の創出につながると期待される。

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Published: 2023-01-30  

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