Microbial activity, arbuscular mycorrhizal fungi and inoculation of woody plants in lead contaminated soil
Braz. j. microbiol
;
42(3): 859-867, July-Sept. 2011. ilus, tab
Artículo
en Inglés
| LILACS
| ID: lil-607514
ABSTRACT
The goals of this study were to evaluate the microbial activity, arbuscular mycorrhizal fungi and inoculation of woody plants (Caesalpinia ferrea, Mimosa tenuiflora and Erythrina velutina) in lead contaminated soil from the semi-arid region of northeastern of Brazil (Belo Jardim, Pernambuco). Dilutions were prepared by adding lead contaminated soil (270 mg Kg-1) to uncontaminated soil (37 mg Pb Kg soil-1) in the proportions of 7.5 percent, 15 percent, and 30 percent (vv). The increase of lead contamination in the soil negatively influenced the amount of carbon in the microbial biomass of the samples from both the dry and rainy seasons and the metabolic quotient only differed between the collection seasons in the 30 percent contaminated soil. The average value of the acid phosphatase activity in the dry season was 2.3 times higher than observed during the rainy season. There was no significant difference in the number of glomerospores observed between soils and periods studied. The most probable number of infective propagules was reduced for both seasons due to the excess lead in soil. The mycorrhizal colonization rate was reduced for the three plant species assayed. The inoculation with arbuscular mycorrhizal fungi benefited the growth of Erythrina velutina in lead contaminated soil.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Fosfatasa Ácida
/
Biotransformación
/
Zona Árida
/
Biomasa
/
Metales Pesados
/
Micorrizas
/
Microbiología Ambiental
/
Hongos
Idioma:
Inglés
Revista:
Braz. j. microbiol
Asunto de la revista:
Microbiologia
Año:
2011
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Instituto de Tecnologia de Pernambuco/BR
/
Universidade Federal Rural de Pernambuco/BR
/
Universidade Federal de Pernambuco/BR
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