Osaka Prefecture University
Osaka Prefecture University
Tohoku University
Japan Aerospace Exploration Agency (JAXA)
Tohoku University
Chiba University
Utsunomiya University
University of Shizuoka
Hamamatsu Photonics K. K.
Institute for Environmental Sciences
Chiyoda Advanced Solutions Corporation
University of Toyama
Osaka City University
Japan Aerospace Exploration Agency (JAXA)
Japan Aerospace Exploration Agency (JAXA)
出版者
宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS)
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
雑誌名
宇宙利用シンポジウム: 第27回: 平成22年度
雑誌名(英)
Space Utilization Research, Vol. 27 2011: Proceedings of The Twenty-seventh Space Utilization Symposium
The Twenty-seventh Space Utilization Symposium (January 24-25, 2011. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan
抄録（英）
A fundamental study was conducted to develop the experimental system to investigate effects of space environment on vegetative and reproductive growth of plants in their life cycles. Sap flow in plant stems plays an important role to transport water and nutrients internally from roots to leaves. In this study, the sap flow in tomato stems was assessed using a simple heat flow method at 0.01, 1.0 and 2.0 g for 20 seconds each during parabolic airplane flights in order to clarify the effect of microgravity on the sap flow in stems. Heat generated with a small heater installed in the stem was transferred upstream and downstream by conduction and upstream by convection with the sap flow through xylems of the vascular tissue. Thermal images of stem surfaces near heated points were captured using infrared thermography and the internal heat convection corresponding to the sap flow was analyzed. In results, the sap flow in stems at 0.01 g was shown to promote under a stirred air condition at a wind speed of 0.5 m s(exp -1) compared with that at 2.0 g. The promoted sap flow under the stirred air condition would be caused by removal of negative gravity effects for upward water flow under the microgravity conditions. The forced air movement is important to grow healthy plants under microgravity condition in space.
内容記述
著者人数: 16人
形態: カラー図版あり
内容記述（英）
Number of authors: 16
Physical characteristics: Original contains color illustrations
宇宙環境に対する植物反応解明のための実験系構築: 微小重力が植物茎内の蒸散流に及ぼす影響
65129061.pdf
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