Abstract
The stability of exogenous ATP in Antarctic Ross desert soils has been assessed using bioluminescence monitoring of ATP-supplemented samples. Under typical east Antarctic dry valley summer conditions (−3 to +15°C), exogenous ATP was degraded with a half-life of between 0.5 and 30 h. The rate of degradation was affected, in order of significance, by soil biomass levels, temperature and water content. Such rapid removal of exogenous ATP strongly suggests that extracellular ATP from lysed cells in cold desiccated soils does not make a significant contribution to the standing ATP titre
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