Análisis de las poblaciones de microorganismos fijadores de nitrógeno del suelo aplicando procedimientos metagenómicos

Abstract

En este trabajo de tesis doctoral se llevó a cabo el análisis de las poblaciones de microorganismos fijadores de nitrógeno del suelo aplicando análisis independientes del cultivo. Se analizaron suelos de la principal región agrícola de la Argentina, la región pampeana.

Soil Bacterial Communities from Three Agricultural Production Systems in Rural Landscapes of Palmira, Colombia

“…In their study "Structure, composition and metagenomic profile of soil for agricultural and farm use" [45], Carbonetto, Rascovan, Álvarez, Mentaberry, and Vázquez found that the most abundant phyla in uncultivated soils were Verrucomicrobia, Plactomycetes, Actinobacteria, and Chloroflexi, while Gemmatimonadetes, Nitrospirae, and WS3 were the most abundant in cultivated soils. Fierer, Bradford, and Jackson [46] suggest that a high number of oligotrophic prokaryotes are found in soils with high amounts of recalcitrant organic matter, while [47] found that Proteobacteria, Firmicutes, Acidobacteria, and Actinobacteria were associated with different stages of the nitrogen cycle. On the other hand, in a study assessing the impact of crops on soil bacterial and fungal diversity in tropical grasslands, Lienhard et al [37] found that tillage performed on crops significantly decreased the relative abundance of Actinobacteria, Acidobacteria, and Delta-proteobacteria, while the presence of Firmicutes, Gamma-proteobacteria, and Chytridiomycota increased.…”