Title:	Functional diversity of bacterial genes associated with aromatic hydrocarbon degradation in anthropogenic dark earth of Amazonia.
Authors:	GERMANO, M. G. CANNAVAN, F. S. MENDES, L. W. LIMA, A. B. TEIXEIRA, W. G. PELLIZARI, V. H. TSAI, S. M.
Affiliation:	Embrapa soja USP CENA-USP USP WENCESLAU GERALDES TEIXEIRA, CNPS USP USP.
Date Issued:	2012
Citation:	Pesquisa Agropecuária Brasileira, v. 47, n. 5, p. 654-664, maio 2012.
Description:	The objective of this work was to evaluate the catabolic gene diversity for the bacterial degradation of aromatic hydrocarbons in anthropogenic dark earth of Amazonia (ADE) and their biochar (BC). Functional diversity analyses in ADE soils can provide information on how adaptive microorganisms may influence the fertility of soils and what is their involvement in biogeochemical cycles. For this, clone libraries containing the gene encoding for the alpha subunit of aromatic ring-hydroxylating dioxygenases (a-ARHD bacterial gene) were constructed, totaling 800 clones. These libraries were prepared from samples of an ADE soil under two different land uses, located at the Caldeirão Experimental Station - secondary forest (SF) and agriculture (AG) -, and the biochar (SF_BC and AG_BC, respectively). Heterogeneity estimates indicated greater diversity in BC libraries; and Venn diagrams showed more unique operational protein clusters (OPC) in the SF_BC library than the ADE soil, which indicates that specific metabolic processes may occur in biochar. Phylogenetic analysis showed unidentified dioxygenases in ADE soils. Libraries containing functional gene encoding for the alpha subunit of the aromatic ring-hydroxylating dioxygenases (ARHD) gene from biochar show higher diversity indices than those of ADE under secondary forest and agriculture.
NAL Thesaurus:	microbial ecology
Keywords:	Catabolic genes Genetic diversity Land use system Tropical soil
DOI:	https://doi.org/10.1590/S0100-204X2012000500004
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPS)