Microbial activity and hydrolase activities during decomposition of root exudates released by an artificial root surface in Cd-contaminated soils
RENELLA, Giancarlo
Università degli Studi di Firenze = University of Florence = Université de Florence [UniFI]
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]
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]
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Università degli Studi di Firenze = University of Florence = Université de Florence [UniFI]
RENELLA, Giancarlo
Università degli Studi di Firenze = University of Florence = Université de Florence [UniFI]
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]
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]
Università degli Studi di Firenze = University of Florence = Université de Florence [UniFI]
NANNIPIERI, Paolo
Università degli Studi di Firenze = University of Florence = Université de Florence [UniFI]
< Reduce
Università degli Studi di Firenze = University of Florence = Université de Florence [UniFI]
Language
en
Article de revue
This item was published in
Soil Biology and Biochemistry. 2006, vol. 38, n° 4, p. 702-708
Elsevier
English Abstract
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 ...Read more >
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 soilRead less <
Keywords
SANDY SOIL
English Keywords
ROOT EXUDATES
Origin
Hal imported