Microbial regulation of the soil carbon cycle: evidence from gene-enzyme relationships.
ISME J
; 10(11): 2593-2604, 2016 11.
Article
en En
| MEDLINE
| ID: mdl-27168143
ABSTRACT
A lack of empirical evidence for the microbial regulation of ecosystem processes, including carbon (C) degradation, hinders our ability to develop a framework to directly incorporate the genetic composition of microbial communities in the enzyme-driven Earth system models. Herein we evaluated the linkage between microbial functional genes and extracellular enzyme activity in soil samples collected across three geographical regions of Australia. We found a strong relationship between different functional genes and their corresponding enzyme activities. This relationship was maintained after considering microbial community structure, total C and soil pH using structural equation modelling. Results showed that the variations in the activity of enzymes involved in C degradation were predicted by the functional gene abundance of the soil microbial community (R2>0.90 in all cases). Our findings provide a strong framework for improved predictions on soil C dynamics that could be achieved by adopting a gene-centric approach incorporating the abundance of functional genes into process models.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Microbiología del Suelo
/
Bacterias
/
Proteínas Bacterianas
/
Carbono
Tipo de estudio:
Prognostic_studies
País/Región como asunto:
Oceania
Idioma:
En
Revista:
ISME J
Asunto de la revista:
MICROBIOLOGIA
/
SAUDE AMBIENTAL
Año:
2016
Tipo del documento:
Article
País de afiliación:
Australia