Evidence for Biotic Perchlorate Reduction in Naturally Perchlorate-Rich Sediments of Pilot Valley Basin, Utah.

  title={Evidence for Biotic Perchlorate Reduction in Naturally Perchlorate-Rich Sediments of Pilot Valley Basin, Utah.},
  author={Kennda L. Lynch and W. Andrew Jackson and Kevin A. Rey and John R. Spear and Frank Rosenzweig and Junko Munakata-Marr},
  volume={19 5},
The presence of perchlorate on Mars suggests a possible energy source for sustaining microbial life. Perchlorate-reducing microbes have been isolated from perchlorate-contaminated soils and sediments on the Earth, but to date, never from an environment that is naturally enriched in perchlorate. The arid Pilot Valley paleolake basin in Utah is a Mars analog environment whose sediments are naturally enriched with up to ∼6.5 μg kg-1 perchlorate oxyanions. Here, we present results of field and… 

Discrete Community Assemblages Within Hypersaline Paleolake Sediments of Pilot Valley, Utah

Results of this first comprehensive geomicrobial study of Pilot Valley reveal that basin sediments harbor a complex and diverse ecosystem.

Metabolic Potential of Microbial Communities in the Hypersaline Sediments of the Bonneville Salt Flats

This study investigated the metabolic potential of the BSF microbial ecosystem and detected aerobic and anaerobic respiration as well as methanogenesis in BSF sediments, demonstrating the potential for multiple energy sources and metabolic pathways within the shallow subsurface of evaporites.

Cryogenic origin of fractionation between perchlorate and chloride under modern martian climate

The high perchlorate (ClO4−) to chloride (Cl−) ratios observed at the Phoenix landing site, northern polar region of Mars, have been puzzling since detection. However, a lack of understanding of

Haloferax volcanii Remains Viable and Shows Morphological Changes under Anoxic (CO2-Enriched) and Hypobaric (2.4 kPa) Atmospheric Conditions.

Potentially habitable zones have been discovered on Mars today in underground areas containing perchlorate brines. Understanding the low-pressure adaptations of microorganisms is essential in

Multiphase Volatilization of Halogens at the Soil‐Atmosphere Interface on Mars

The Martian critical zone, especially its soil‐atmosphere interface, may host an active halogen cycle affecting habitability, as inferred from halogen trends observed in situ at Gusev and Meridiani,

Mars Extant Life: What's Next? Conference Report

It is concluded that the key to the search for martian extant life lies in identifying and exploring refugia (“oases”), where conditions are either permanently or episodically significantly more hospitable than average.

Potential Biological Remediation Strategies for Removing Perchlorate from Martian Regolith

This article aims to inform the development of biological perchlorate remediation schemes for the preparation of safer human Mars habitats and contaminant-free in situ resource utilization (ISRU) f...

Introduction—First Billion Years: Habitability

This Special Collection is a review of the main themes and a synopsis of the FBY Habitability conference that included discussions of planetary habitability and the potential emergence of life on bodies within the authors' Solar System, as well as extrasolar systems by applying the knowledge of the Solar System's FBY.



Discovery of natural perchlorate in the Antarctic Dry Valleys and its global implications.

The results support the hypotheses that perchlorate is produced globally and continuously in the Earth's atmosphere, that it typically accumulates in hyperarid areas, and that it does not build up in oceans or other wet environments most likely because of microbial reduction on a global scale.

Breathing Perchlorate

On page 85 of this issue, Liebensteiner et al. show that the hyperthermophilic archaeon Archaeoglobus fulgidus can also respire with perchlorate and chlorate, a discovery that changes several paradigms about per chlorate-reducing microorganisms.

Widespread presence of naturally occurring perchlorate in high plains of Texas and New Mexico.

Groundwater from an area of 155,000 km2 in 56 counties in northwest Texas and eastern New Mexico is impacted by the presence of perchlorate, and the source of ClO4- appears to most likely be atmospheric deposition.

Microbial perchlorate reduction: rocket-fuelled metabolism

The recent completion of the whole-genome sequence of the perchlorate-reducing microorganism Dechloromonas aromatica offers further insight into the evolution and regulation of this unique metabolic pathway.

Archaeal (Per)Chlorate Reduction at High Temperature: An Interplay of Biotic and Abiotic Reactions

Biological (per)chlorate reduction by ancient archaea at high temperature may have prevented accumulation of perchlorate in early terrestrial environments and consequently given rise to oxidizing conditions on Earth before the rise of oxygenic photosynthesis.

Natural perchlorate has a unique oxygen isotope signature.

  • H. BaoB. Gu
  • Environmental Science
    Environmental science & technology
  • 2004
It is found that the delta 18O values of man-made perchlorate were at -18.4+/-1.4%, which confirms an early speculation that the oxidation of volatile chlorine by 03 and the formation of HClO4 can be a sink (albeit a minor one) for atmospheric chlorine.

Forensic Identification of Anthropogenic and Naturally Occurring Sources of Perchlorate

Abstract Perchlorate (ClO4 −) is an emerging contaminant whose presence and origin is of considerable environmental interest. This article discusses known sources of perchlorate and available

Dissimilatory perchlorate reduction: a review.

Widespread natural perchlorate in unsaturated zones of the southwest United States.

A substantial reservoir of natural perchlorate is present in diverse unsaturated zones of the arid and semi-arid southwestern United States and appears widespread in steppe-to-desert ecoregions, which may help explain increasing reports of per chlorine in dry region agricultural products.