Sherlynette Pérez Castro

Abstract The majority of soil carbon (C) is stored in organic matter associated with reactive minerals. These mineral-organic associations (MOAs) inhibit microbial and enzymatic access to organic matter, suggesting that organic C within MOAs is resistant to decomposition. However, plant roots and rhizosphere microbes are known to transform minerals through dissolution and exchange reactions, implying that MOAs in the rhizosphere can be dynamic.

Introduction Click to copy section linkSection link copied! Redox variability is ever present in soils (1−3) and drives critical biogeochemical transformations of iron (Fe), methane (CH4), and other compounds. (4−7) This is most evident in the spatial redox heterogeneity that emerges within microsites and along flow paths and can yield vastly different redox conditions of soil locales separated by a cm or less.

Introduction Click to copy section linkSection link copied! Redox variability is ever present in soils (1−3) and drives critical biogeochemical transformations of iron (Fe), methane (CH4), and other compounds. (4−7) This is most evident in the spatial redox heterogeneity that emerges within microsites and along flow paths and can yield vastly different redox conditions of soil locales separated by a cm or less.