Siderophore production by actinomycetes isolates from two soil sites in Western Australia

Lee, J. and Postmaster, A. and HooiPeng, S. and et al, . (2012) Siderophore production by actinomycetes isolates from two soil sites in Western Australia. BioMetals, 25 (2). pp. 285-296.

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The actinomycetes are metabolically flexible soil micro-organisms capable of producing a range of compounds of interest, including siderophores. Siderophore production by actinomycetes sampled from two distinct and separate geographical sites in Western Australia were investigated and found to be generally similar in the total percentage of siderophore producers found. The only notable difference was the proportion of isolates producing catechol siderophores with only 3% found in site 1 (from the north-west of Western Australia and reportedly containing 40% magnetite) and 17% in site 2 (a commercial stone fruit orchard in the hills east of Perth with a soil base ranging from sandy loam to laterite). Further detailed characterization of isolates of interest identified a Streptomyces that produced extracellularly excreted enterobactin, the characteristic Enterobacteriaceae siderophore, and also revealed some of the conditions required for enterobactin production. Carriage of the entF gene, which codes for the synthetase responsible for the final assembly of the tri-cyclic structure of enterobactin, was confirmed by PCR in this isolate. Another separate Streptomyces produced a compound that matched the UV/VIS spectra of heterobactin, a siderophore previously only described in Rhodococcus and Nocardia

Item Type: Article
Uncontrolled Keywords: Siderophores; Actinomycetes; Streptomyces; Enterobactin; Heterobactin
Author Affiliation: Discipline of Microbiology and Infectious Diseases, PathWest Laboratory Medicine WA, QEII Medical Center, Hospital Ave, Nedlands, WA, Australia
Subjects: Soil Science and Microbiology > Microbiology
Soil Science and Microbiology > Soil Sciences
Plant Physiology and Biochemistry > Plant Physiology
Plant Physiology and Biochemistry > Biochemistry
Divisions: General
Depositing User: Ms K Syamalamba
Date Deposited: 29 Jan 2013 03:24
Last Modified: 29 Jan 2013 03:24
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