| 62333 |
Creator |
34150f2f89a55de66712a0576f106400 |
| 62333 |
Creator |
7c9060b8651fa54e11ffd46d3aba6da8 |
| 62333 |
Creator |
bd12e480200a0e58504d6106bfed3c8a |
| 62333 |
Creator |
0519c7e3d5b481315278655a3c8c63cf |
| 62333 |
Creator |
95f68b10fb49eec7b7d3b7db9817decc |
| 62333 |
Date |
2017 |
| 62333 |
Is Part Of |
repository |
| 62333 |
abstract |
There is evidence that water may exist on Mars in the form of brines. The chemistries
of these brines will be greatly influenced by the local lithologies, which would,
in turn, impact on the organisms that could survive there . Four geological analogues
were developed based on four broad martian lithologies: a global composition, an early
and unaltered basaltic composition, a sulfur rich composition and a haematite rich
composition (see talk by Ramkissoon et al., this conference, for further details).
These analogues, and the brines derived from them, will be used to simulate the martian
environment and will be inoculated with three species of methanogenic archaea to examine
the impacts on their growth and metabolism.
Methanogenic archaea represent model organisms for attempting to characterize martian
life. A hydrogenotrophic metabolism enables them to survive through autotrophic growth
on carbon dioxide. Three species of methanogenic archaea were selected to be used
in a series of simulation experiments to evaluate the potential habitability of potential
aqueous subsurface environments on Mars. Of the selected species, all have been shown
to have a robust temperature and pH tolerance. Furthermore, Methanosarcina soligelidi
SMA-21 is highly resistant to desiccation, starvation and ultraviolet radiation and
has been shown to grow under martian simulation conditions; Methanobacterium arcticum
M2 is able to tolerate high concentrations of perchlorate.
In this poster, we will present details of how these organisms will be inoculated
into brines derived from the martian regolith analogues and how survivability, growth
and alterations in metabolism of these species will be assessed following incubation. |
| 62333 |
authorList |
authors |
| 62333 |
presentedAt |
ext-f508e728033eb387ed73e0677278d556 |
| 62333 |
status |
peerReviewed |
| 62333 |
type |
AcademicArticle |
| 62333 |
type |
Article |
| 62333 |
label |
Macey, Michael C. ; Ramkissoon, Nisha K. ; Schwenzer, Susanne P. ; Pearson, Victoria
K. and Olsson-Francis, Karen (2017). The impact of martian chemistry on the metabolism
of methanogenic archaea. In: 7th Astrobiology Society of Britain Conference, 13-14
Sep 2017, The Open University, Milton Keynes, UK. |
| 62333 |
label |
Macey, Michael C. ; Ramkissoon, Nisha K. ; Schwenzer, Susanne P. ; Pearson, Victoria
K. and Olsson-Francis, Karen (2017). The impact of martian chemistry on the metabolism
of methanogenic archaea. In: 7th Astrobiology Society of Britain Conference, 13-14
Sep 2017, The Open University, Milton Keynes, UK. |
| 62333 |
Title |
The impact of martian chemistry on the metabolism of methanogenic archaea |
| 62333 |
in dataset |
oro |