Japan Geoscience Union Meeting 2016

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Oral

Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS33] Microbial ecology in earth and planetary sciences

Mon. May 23, 2016 9:00 AM - 10:25 AM 106 (1F)

Convener:*Michinari Sunamura(University of Tokyo Dept. of Earth & Planetary Science), Ken Takai(Extremobiosphere Research Center, Japan Agency for Marine-Earth Science & Technology), Natsuko Hamamura(Kyushu University), Yuki Morono(Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology), Chair:Michinari Sunamura(University of Tokyo　Dept. of Earth & Planetary Science), Natsuko Hamamura(Kyushu University)

9:50 AM - 10:05 AM

[MIS33-04] Dry heat tolerance of a terrestrial cyanobacterium, Nostoc sp. HK-01

*Shunta Kimura1, Kotomi Inoue1, Hiroshi Katoh2, Seigo Sato1, Kaori Tomita-Yokotani1 (1.Graduate School of Life and Environmental Sciences, University of Tsukuba, 2.Life Science Research Center, Mie University)

Keywords:Akinete, Dry heat tolerance, Nostoc sp. HK-01, Terrestrial cyanobacteria

Terrestrial cyanobacteria have played an important role in carbon and nitrogen circulation on the earth since ancient times. Terrestrial cyanobacteria have a dry heat tolerance from 60 to over 100℃, but the detailed function of the tolerance has not yet been determined. Dry heat tolerance is important for terrestrial cyanobacteria to survive on land. A terrestrial cyanobacterium, Nostoc sp. HK-01 has a dry heat tolerance up to 100℃ for 10 h. We elucidated that akinete (dormant cell) is the cell type which has a tolerance to dry heat in Nostoc sp. HK-01. Some active substances may exist in the akinete. Here, we will show a candidate active substance related to dry heat tolerance in Nostoc sp. HK-01.