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IMPACT OF CRUDE OIL ON FUNCTIONAL GROUPS OF CULTURABLE BACTERIA AND COLONIZATION OF SYMBIOTIC MICROORGANISMS IN THE Clitoria-Brachiaria RHIZOSPHERE GROWN IN MESOCOSMS Acta biol.Colomb.
ALARCÓN,Alejandro; GARCÍA-DÍAZ,Mariano; HERNÁNDEZ-CUEVAS,Laura Verónica; ESQUIVEL-COTE,Rosalba; FERRERA-CERRATO,Ronald; ALMARAZ-SUAREZ,Juan José; FERRERA-RODRÍGUEZ,Ofelia.
ABSTRACT This research evaluated the changes on populations of culturable N-fixing free bacteria (NFFB) and P-solubilizing bacteria (PSB), as well as on the root nodulation by native rhizobia, the root colonization and spore number of arbuscular mycorrhizal fungi (AMF), in the rhizosphere of Clitoria ternatea and Brachiaria brizantha grown in mesocosms contaminated with crude oil (0, 3000, 6000, 9000, and 12000 mg kg-1), for 240 days. After 24 h of soil contamination, the highest populations of NFFB and PSB (5.5 and 4.9 LogUFC, respectively) were found in control, and the lowest populations were obtained at 12000 mg kg-1 (5.1 and 4.2 LogUFC, respectively). In contrast, at 60 and 240 days, the control showed lower populations of NFFB and PSB (5.4 and 4.8...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Arbuscular mycorrhizal fungi; Crude oil; N-fixing free bacteria; P-solubilizing bacteria; Root nodulation; Soil contamination.
Ano: 2019 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2019000200343
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