RENELLA, Giancarlo; EGAMBERDIYEVA, Dilfuza; LANDI, Loretta; MENCH, Michel; NANNIPIERI, Paolo

doi:10.1016/j.soilbio.2005.06.021

Metadatos

Mostrar el registro completo del ítem

Licencia de uso del documento

RENELLA, Giancarlo
Università degli Studi di Firenze = University of Florence = Université de Florence [UniFI]

EGAMBERDIYEVA, Dilfuza
Università degli Studi di Firenze = University of Florence = Université de Florence [UniFI]

LANDI, Loretta
Università degli Studi di Firenze = University of Florence = Université de Florence [UniFI]

Idioma

Article de revue

Este ítem está publicado en

Soil Biology and Biochemistry. 2006, vol. 38, n° 4, p. 702-708

Elsevier

Resumen en inglés

The aim of this study was to assess the stimulatory effects of different low molecular weight organic compounds commonly present in root exudates on microbial activity and hydrolase activities, and the effects of high Cd concentrations in sandy soils collected from contaminated field plots on the stimulatory effects. Glucose, glutamic acid, citric acid, oxalic acid, or a mixture of all compounds were released by an artificial root surface in a simplified rhizosphere system. The effects were measured at <2 mm (rhizosphere soil layer) and >4 mm (bulk soil layer) distance from the root surface, 7 d after the root exudates release. Results showed that different root exudates were mineralized at different extent and had different stimulatory effects on microbial growth estimated by dsDNA content of soil, and on hydrolase activities, mostly localized in the rhizosphere soil layer. Mineralization of root exudates, microbial growth and stimulation of most of the measured hydrolase activities were drastically reduced by high Cd concentrations in soil< Leer menos

Palabras clave

SANDY SOIL

Palabras clave en inglés

ROOT EXUDATES