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Titolo:
MICROBIAL DISSOLUTION OF IRON AND ALUMINUM FROM SOIL MINERALS - EFFICIENCY AND SPECIFICITY OF HYDROXAMATE SIDEROPHORES COMPARED TO ALIPHATIC-ACIDS
Autore:
WATTEAU F; BERTHELIN J;
Indirizzi:
CNRS,CTR PEDOL BIOL,17 RUE N D PAUVRES,BP N5 F-54501 VANDOEUVRE NANCYFRANCE
Titolo Testata:
European journal of soil biology
fascicolo: 1, volume: 30, anno: 1994,
pagine: 1 - 9
SICI:
1164-5563(1994)30:1<1:MDOIAA>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
RHIZOSPHERE; CHELATORS;
Keywords:
SIDEROPHORES; MICROBIAL WEATHERING OF MINERALS; IRON MICROBIAL DISSOLUTION; IRON AVAILABILITY; ALUMINUM DISSOLUTION; ECTOMYCORRHIZAL FUNGUS; FERRIC OXYHYDROXIDE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
F. Watteau e J. Berthelin, "MICROBIAL DISSOLUTION OF IRON AND ALUMINUM FROM SOIL MINERALS - EFFICIENCY AND SPECIFICITY OF HYDROXAMATE SIDEROPHORES COMPARED TO ALIPHATIC-ACIDS", European journal of soil biology, 30(1), 1994, pp. 1-9

Abstract

Experimental treatments were performed in order to study the dissolution of iron and aluminium from different minerals by siderophores and aliphatic acids, either produced by an ectomycorrhizal fungus (biotic conditions) or of synthetic origin (abiotic conditions). The selected experimental minerals choosen were a well cristallized ferric oxide (goethite), a mica (biotite) and a sulfide (pyrite). Results shows that the hydroxamate siderophores produced by the fungus are more efficientin the dissolution of the goethite than the aliphatic acids of same origin. The efficiency of the siderophore to dissolve goethite is confirmed in abiotic experiments. For biotite and pyrite, as iron is more available, any siderophore is produced by the fungus and iron is mobilized by the aliphatic acids. In abiotic conditions siderophore is also more efficient than the aliphatic acids tested to dissolve iron from biotite and pyrite. Large amounts of aluminium are also solubilized by the siderophore from the biotite. The specificity of siderophore is proved not to be very strict as this compound is able to dissolve ferricand ferrous iron from different cristallochemical structure, but alsoaluminium from silicates. But its efficiency in iron dissolution is always predominant and much more with ferric oxide mineral.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 08:50:30