2022 Fiscal Year Final Research Report

Role of node for integration of environmental responses in rice

Research Project

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Project/Area Number	19H03250
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Review Section	Basic Section 44030:Plant molecular biology and physiology-related
Research Institution	Okayama University
Principal Investigator	Yamaji Naoki 岡山大学, 資源植物科学研究所, 准教授 (00444646)
Co-Investigator(Kenkyū-buntansha)	三谷奈見季岡山大学, 資源植物科学研究所, 准教授 (40581020) 横正健剛岡山大学, 資源植物科学研究所, 准教授 (50790622)
Project Period (FY)	2019-04-01 – 2023-03-31
Keywords	節 / イネ / 環境応答 / 応答調節
Outline of Final Research Achievements	To understand role of node for integration of environmental responses in rice, We conducted transcriptome analyses in nodes under several stress conditions, and selected several candidate genes prominently express in nodes encoding transcription factor, receptor, peptide hormone etc. uncharacterized previously. Through the functional characterization experiments using newly prepared knockout lines, we identified a transporter gene which have multiple effects on K/Ca/P/As translocation, a transcription factor which change the splicing patterns depend on nutrition conditions and so on. Among them, SSS (Shoot Silicon Signal) showed remarkable response to silicon supply level. We demonstrate that SSS protein move to the roots and regulate the root silicon uptake ability.
Free Research Field	植物分子生物学
Academic Significance and Societal Importance of the Research Achievements	イネ科植物の節は栄養素分配の集約的な機能を担い、茎、葉、腋芽、根の結節点として成長の可塑性を生み出す要でもある。さらに情報分子の主要な伝達経路として、情報に対する応答や新たな情報の発信、変換、転送などを担う情報処理ネットワークにおけるNodeでもあると予想される。植物の節の情報処理に着目した研究はこれまでに無く、本研究により節の情報処理を担う分子実体のいくつかを見出すことができた。本研究のさらなる発展は、イネ科作物の生産性やストレス耐性の改善にもつながる。