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Microbial Exo-Enzyme Activities In Soil As Infuenced By Polyphenol Chemistries, Daniella Freese

All Theses

Soil organic matter decomposition is directly driven by the soil extracellular enzymes excreted by soil microorganisms. Therefore, factors which impede extracellular enzyme activity would result in retarding the rate of soil organic matter decomposition. Several factors in the soil may influence soil extracellular enzymes including the plant secondary metabolites, polyphenols- tannins and lignins. However, thus far few investigations have considered the direct and indirect impacts of polyphenols on soil enzyme activities. Hence, three investigations were conducted to understand the ecological impacts of tannins and lignins on soil extracellular enzyme activities.
Tannins, further classified as condensed and hydrolysable tannins, can hamper …