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Astrobiology and Exobiology 1

Monday, March 13, 2023, 8:20 AM
Montgomery Ballroom

Kathy Benison
Steve Larter
Scott Perl
8:20 AM
Session Introduction
8:25 AM
Walter A. Kounaves S. P.*
Fragmentation of Tryptophan as a Biomarker on Mars when Exposed to UV Irradiation in the Presence of an Oxychlorine [#2634]
Exposure of tryptophan on Mars to UV irradiation in the presence of an oxychlorine salt (sodium chlorite) results in fragmentation/alteration of the biomarker.
8:35 AM
Larter S. R.* Snowdon L. R. Tutolo B. M. Silva R. C.
Preservation of Biomarker and Aliphatic Carbon Signals on Highly Irradiated Organic Matter Bearing Planetary Bodies [#1144]
We assess gamma radiolysis (to 10 MGy) on durability of biomarker hydrocarbons, contemplating optimal protocols to detect biomarker signals on other worlds.
8:45 AM
Fox A. C.* Jakubek R. S. Eigenbrode J. L.
Changes in the Raman and Fluorescence Spectroscopic Signatures of Irradiated Organic-Mineral Mixtures: Implications for Molecular Biosignature Detection on Mars [#1548]
The effect of high-energy radiation on organic-mineral mixtures and the implications for molecular biosignature detection on Mars.
8:55 AM
Bernard S.* Beyssac O. Ollila A. Lopez-Reyes G. Manrique J. et al.
Irradiation of Organics on Mars: Evolution of the Raman Signal of the Ertalyte Target Aboard Perseverance [#1443]
The SuperCam Raman study of the Ertalyte target onboard Perseverance allows investigating the actual impact of UV radiation on organic materials on Mars.
9:05 AM
Panel Q&A
9:25 AM
Benison K. C.* Bosak T. Clark B. C. Czar A. D. Fornaro T. et al.
9:35 AM
Perl S. M.* Celestian A. J. Cockell C. S. Corsetti F. A. Basu C. et al.
Microbial Pigment Robustness in Martian and Ocean Worlds Brines and Evaporites [#2434]
We highlight the results of UV-C exposure on biological pigments in simulated martian settings and validation of cellular measurements and biopreservation.
9:45 AM
Feng T.* Pasek M. A.
Thermal Phosphide Mineral Oxidation Chemistry [#1322]
Phosphides are able to oxidize into calcium phosphates with the support of silicate minerals in meteorites under high temperatures and lack of water conditions.
9:55 AM
Chan Q. H. S.* Watson J. S. Sephton M. A.
The Amino Acid Composition of the Winchcombe Meteorite [#1474]
Our interest in the biologically relevant molecules, amino acids-monomers of protein, is addressed by GC-MS analysis of the hot water extraction of Winchcombe.
10:05 AM
Panel Q&A
10:25 AM
Gann P. J. Ramachandran A. R.* Dwiningsih Y. D. Dharwadker D. D. Srivastava V. S.
Rice Can Grow and Survive in the Martian Regolith with Challenges that Could Be Overcomed Through Control of Stress-Related Genes [#2990]
It is possible to grow rice in MMS1 and editing SnRK1a could be an approach to develop a stable rice line that can germinate and grow in MMS1 with Mg(ClO4)2.
10:35 AM
Foustoukos D. I.* Pérez-Rodríguez I. Sievert S. M. Vetriani C.
Lithotrophic Nitrate Reduction Under High-Pressure Conditions at Deep-Sea Vents [#1084]
We assess the effect of chemolithoautotrophic NO3-reduction on the adaptation strategies of microbial communities at the extreme conditions of deep-sea vents.
10:45 AM
Zhao L.* Perez-Fernandez C. A. DiRuggiero J. Ramesh K. T.
Microbial Response to Extreme Impact Stresses [#2424]
Microbial survival and response to high dynamically applied pressures are characterized by impact experiments on cells to understand the limits of life.
10:55 AM
Cycil L. C.* Hausrath E. M. Raymond J. Ming D. W. Adcock C. T. et al.
Transcriptome-Based Expression Analysis and O2 Generation of Algae Growing Under Mars-Relevant Low Pressure and Variable Light Intensities and Wavelengths [#2797]
Transcriptome-based expression analysis and O2 generation of algae growing under Mars-relevant low pressure and variable light intensities and wavelengths.
11:05 AM
Panel Q&A
11:25 AM
Session Closure