Sodium and potassium uptake of Ulva - Application of marine macro-algae for space agriculture

被引：8
作者：
Yamashita, M. [1 ]
Tomita-Yokotani, K. [2 ]
Hashimoto, H. [2 ]
Sawaki, N. [3 ]
Notoya, M. [3 ]
机构：
[1] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan
[2] Univ Tsukuba, Tsukuba, Ibaraki 3058572, Japan
[3] Tokyo Univ Marine Sci & Technol, Minato Ku, Tokyo 1088477, Japan
来源：
ADVANCES IN SPACE RESEARCH | 2009年 / 43卷 / 08期
关键词：
Space agriculture; Marine algae; Sodium; PRODUCTIVITY; GROWTH;
D O I：
10.1016/j.asr.2009.02.004
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
The treatment of sodium, Na, and potassium, K, presents a challenge in space agriculture material recycling, as humans require Na and plants cannot grow at high Na concentrations. Hence, we are proposing the use of marine macro-algae to harvest K and other minerals from composted human waste. Ulva was selected for this feasibility study, since it tolerates a wide range of salinity levels. Growth capability of Ulva was examined under various total salinity levels and proportions of Na and K in the incubation medium. A homeo-static feature of Ulva was found in its intra-cellular concentration of Na and K, and in the intra-cellular ratio between Na and K (at 0.58 +/- 0.30, lower than that of human metabolic waste). Intracellular concentration of K in Ulva is 20 times higher than seawater. Because of these characteristics, Ulva is a good candidate species for space agriculture. (C) 2009 COSPAR. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1220 / 1223
页数：4
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