Graduate School of Life Sciences, Tohoku University
Osaka Prefecture University
Advanced Engineering Services
University of Toyama
Saitama University
Osaka Prefecture University
Osaka City University
Nara Institute of Science and Technology
Tohoku University
Osaka City University
Tohoku University
Osaka Prefecture University
National Institute for Basic Biology (NIBB)
Japan Aerospace Exploration Agency (JAXA)
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙利用シンポジウム
雑誌名(英)
Space Utilization Research: Proceedings of Space Utilization Symposium
The Twenty-fifth Space Utilization Symposium (January 14-15, 2009: ISAS/JAXA Sagamihara, Japan)
抄録（英）
Studies of our working group are aimed at understanding the graviperception mechanism and its interactions with other gravity-influenced phenomena of growth and development of plants. Our collaborative works will bring about hypotheses on the molecular mechanisms underlying plant responses to gravity, which will be further verified by spaceflight experiments. This approach will also lead to the establishment of technology useful for controlling plant growth and development in space. We continued our studies to reveal mechanisms underlying graviperception in plants, and based on microarray analysis of a gravitropic mutant and its wild type Arabidopsis and newly screened gravitropic mutants of Arabidopsis we obtained novel graviresponse-related genes. In addition, we utilized two agravitropic mutants of morning glory defective in gravisensing cell differentiation and found that graviperception was involved in the bending-induced growth of lateral shoots and that the mechanisms underlying gravity- and decapitation-regulated release from apical dominance were distinct and unique. Furthermore, we studied automorphogenesis of pea epicotyls and hydrotropism in Arabidopsis roots, as gravity-influenced growth responses in plants. The results provided us with a clue to understand the interaction between automorphogenesis and gravitropism in relation to auxin transport. Also, identification of genes responsible for ahydrotropism of Arabidopsis mutant revealed molecular mechanisms unique to hydrotropism but independent of gravitropism.
フロンティア生物の戦略: 植物の成長と重力受容システム
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