Sub-surface microbial metabolic pathways in hyper-arid Atacama desert soils revealed by deep metagenomics

What the research examines

Genome-resolved metagenomics of hyper-arid Atacama soil pits up to 4 meters depth reveals novel bacterial phyla subsisting on trace atmospheric hydrogen, carbon monoxide, and hygroscopic salt deliquescence without photosynthetic energy.

Why it may matter

Establishes metabolic models for life surviving in hyper-arid planetary analogs on the surface and subsurface of Mars.

What to examine carefully

Extreme desiccation results in high proportions of non-viable extracellular relic DNA requiring propidium monoazide filtering.

Try a small, reproducible follow-up

Screen metagenome-assembled genomes (MAGs) for [NiFe]-hydrogenase and carbon monoxide dehydrogenase gene clusters in R.

Questions to investigate

1. How do halite and gypsum salt inclusions facilitate deliquescence-driven moisture capture at 15% relative humidity?
2. What cellular DNA repair enzymes are up-regulated to withstand multi-year desiccation dormancy?

These are independently proposed educational investigations, not activities that the original research authors claim to have completed.

Publication & researcher information

Multi-author research may involve universities in several countries. Unverified institutions and contact addresses are not inferred from authors' names.

Primary sources