[H-CG28] Circulation of materials in closed bio-ecosystems by the systems of organisms.

[HCG28-P04] Evaluation of food functions of a terrestrial cyanobacterium, Nostoc sp. HK-01 in closed bio-ecosystems

*Yasuko Kimura^1,2, Shunta Kimura², Hiroshi Katoh³, Mayumi ARAI⁴, Seigo SATO², Kaori Tomita-Yokotani² (1.Jumonji University, 2.University of Tsukuba, 3.Mie University, 4.National Museum of Emerging Science and Innovation)

Keywords:closed bio-ecosystems, cyanobacteria, food resource, Nostoc sp.HK-01, food functions

We study life-support in closed bio-ecosystems to provide food and oxygen for habitation in severe environments. We propose several species of organisms as candidate species. A terrestrial cyanobacterium, Nostoc sp. HK-01 has several unique abilities, such as photosynthesis, nitrogen fixation and tolerance to an extraterrestrial environment. Here, we propose to utilize Nostoc sp. HK-01 as a food resource in extraterrestrial environments such as Mars. We indicate that Nostoc sp. HK-01 has food functions as primary(nutritional), secondary(sensory), tertiary(physiological). We will discuss the utilization as a food resource of Nostoc sp. HK-01 in closed bio-ecosystems. Our results may contribute to the supply of food resources under severe conditions for life-support in closed bio-ecosystems.