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2022 Fiscal Year Final Research Report

A theoretical study for the kin discrimination of plants: the perspective of plant growth

Research Project

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Project/Area Number 20K15876
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 45040:Ecology and environment-related
Research InstitutionTokyo Metropolitan University

Principal Investigator

Tachiki Yuuya  東京都立大学, 理学研究科, 助教 (40741799)

Project Period (FY) 2020-04-01 – 2023-03-31
Keywords植物 / ゲーム理論 / 数理モデル / 競争 / 協力 / 進化
Outline of Final Research Achievements

An increasing number of studies have focused on tragedy of the commons in belowground competition in plants. Game theoretic approaches has contributed to understand the condition in which plants exhibit the overproliferation of roots. In this study we incorporated the growth dynamics in the tragedy of the commons game in plants. As a result we demonstrated that the tragedy of the commons commonly occurred but the root overproliferation does not necessarily occur (Kim et al 2021). In addition to this, we consider the situation in which plants know the kinship with their competitor and change their rooting tactic depending on it. We derived the condition in which plants cooperate each other to achieve the highest fitness gain without the overproliferation of roots.

Free Research Field

生態学

Academic Significance and Societal Importance of the Research Achievements

植物は周囲の物理/化学的な環境だけでなく、生物学的環境にも柔軟に応答することがわかってきました。植物が周囲の他個体と土壌中の資源をめぐって競争しているときには、自身の成長バランスを乱してでも根を大きくさせます。この応答を個体群のすべての個体が行うことで生産性が低下してしまうことから共有地の悲劇に例えられます。本研究では、植物の共有地の悲劇に関連して植物が成長しながら競争を行うプロセスや、植物が競争相手との血縁関係に応じて振る舞いを変える現象について、数理モデルを用いた理論研究を展開しました。この成果は植物の種多様性維持機構についての新たなプロセスの提案や、農作物の生産性向上に寄与します。

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Published: 2024-01-30  

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