2024-03-29T09:12:14Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2140752021-12-28T15:57:42Zcom_10261_15com_10261_6col_10261_268
Persistence of microbial extracellular enzymes in soils under different temperatures and water availabilities
Gómez Fernández, Enrique J.
Delgado Romero, José A.
González Grau, Juan Miguel
Ministerio de Economía y Competitividad (España)
Junta de Andalucía
González Grau, Juan Miguel [0000-0003-4746-6775]
Extracellular enzyme activiti
Persistence
Soils
Temperatures
Water availability
Water activity
Organic matter decomposition
10 páginas.- 3 figuras.- 1 tabla.- 36 referencias
Microbial extracellular enzyme activity (EEA) is critical for the decomposition of organic matter in soils. Generally, EEA represents the limiting step governing soil organic matter mineralization. The high complexity of soil microbial communities and the heterogeneity of soils suggest potentially complex interactions between microorganisms (and their extracellular enzymes), organic matter and physicochemical factors. Previous studies have reported the existence of maximum soil EEA at high temperatures although microorganisms thriving at high temperature represent a minority of soil microbial communities. To solve this paradox, we attempt to evaluate if soil extracellular enzymes from thermophiles could accumulate in soils. Methodology at this respect is scarce and an adapted protocol is proposed. Herein, the approach is to analyze the persistence of soil microbial extracellular enzymes at different temperatures and under a broad range of water availability. Results suggest that soil high temperature EEA presented longer persistence than enzymes with optimum activity at moderate temperature. Water availability influenced enzyme persistence, generally preserving for longer time the extracellular enzymes. These results suggests that hightemperature extracellular enzymes could be naturally accumulated in soils. Thus, soils could contain a reservoir of enzymes allowing a quick response by soil microorganisms to changing conditions. This study suggests the existence of novel mechanisms of interaction among microorganisms, their enzymes and the soil environment with relevance at local and global levels.
2020-06-10T20:15:27Z
2020-06-10T20:15:27Z
2020-08-17
artículo
Ecology and Evolution (2020) https://doi.org/10.1002/ece3.6677
http://hdl.handle.net/10261/214075
10.1002/ece3.6677
2045-7758
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100011011
33005372
eng
http://dx.doi.org/10.1002/ece3.6677
Sí
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2014-58762-P
https://creativecommons.org/licenses/by/4.0/
openAccess
John Wiley & Sons