Analysis of pathways of gravity-sensing and gravity-signaling in plants

2014 Fiscal Year Final Research Report

• Project/Area Number: 24620002
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: 宇宙生命学
• Research Institution: Tohoku University
• Principal Investigator: FUJII NOBUHARU 東北大学, 生命科学研究科, 准教授 (70272002)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 植物 / 重力感受 / アミロプラスト / 国際宇宙ステーション (ISS) / 微小重力 / 過重力

Outline of Final Research Achievements

Sensing of gravity in plants is composed of amyloplast sedimentation (PGM pathway) and ARG1 pathway. However, a gravity-sensing molecule that converts gravistimulation into intracellular signals has not been identified. In this study, we found that gravity-responses in arg1 pgm double mutants could be detected under the hypergravity condition that was created by a low-speed centrifuge. Therefore, we screened M2 seedlings of arg1 pgm double mutants that were mutagenized with EMS, and isolated 4 lines of enhancer of arg1 pgm mutants that exhibited less gravity-responses than arg1 pgm mutants did. Hereafter, we expect that analysis of these mutants will allow us to obtain a new insight of how plants sense gravity.

Free Research Field

植物生理