Uncovering the molecular basis of nitrogen starvation responses

2023 Fiscal Year Final Research Report

• Project/Area Number: 20H02888
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 38010:Plant nutrition and soil science-related
• Research Institution: Nagoya University
• Principal Investigator: Kiba Takatoshi 名古屋大学, 生命農学研究科, 准教授 (20532097)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 窒素飢餓 / 窒素欠乏 / 窒素栄養 / 植物

Outline of Final Research Achievements

In this study, we aimed to understand the molecular basis of the nitrogen starvation response regulation in plants, from perception to output, by exploring novel factors using nitrogen starvation markers in Arabidopsis and reevaluating known factors involved in nitrogen response regulation. Through mutant screening and yeast one-hybrid screening, we successfully identified multiple novel candidate regulators. Additionally, reevaluation of the known factors revealed that the NLP and LBD transcription factor families play a more significant role in controlling nitrogen starvation response than previously thought.

Free Research Field

植物栄養学

Academic Significance and Societal Importance of the Research Achievements

本研究によって、植物の窒素飢餓応答制御機構の理解が大きく進んだ。近年窒素肥料の過剰な使用が、コスト高を招いているだけでなく深刻な環境問題をも引き起こしており、世界的に低投入持続型農業への移行が求められている。窒素飢餓応答機構の解明は、窒素飢餓耐性植物や窒素低要求性植物など、低投入型持続的農業に適した新たな優良品種の開発につながるため、社会的インパクトも大きい。