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Title: Siderophores of halophilic archaea and their chemical characterization
Authors: Dave, B P
Anshuman, Kena
Hajela, Puja
Keywords: Amphiphilic siderophores
Carboxylate
Catecholate
Halophilic archaea
Hydroxamate
Siderophores
Issue Date: Apr-2006
Publisher: CSIR
Abstract: Nine halophilic archaea viz., Halobacterium salinarum, Halobacterium sp.1, Halobacterium sp.2, Halobaculum sp., Halococcus saccharolyticus, Halorubrum saccharovorum, Haloterrigena turkmenica, Halogeometricum sp. and Natrialba sp. isolated from marine salterns around Bhavnagar coast were screened for siderophore production. Five isolates viz., Halococcus saccharolyticus, Halorubrum saccharovorum, Haloterrigena turkmenica, Halogeometricum sp. and Natrialba sp. produced siderophores as evidenced by positive reaction in FeCl3 test, CAS assay and CAS agar plate test. Determination of chemical nature of siderophores by chemical assays and bioassays identified them as carboxylates. Quantification of siderophores indicated Halorubrum saccharovorum to be the maximum siderophore producer (2.62 RE mg/ml) and Halococcus saccharolyticus to be the least (1.33 RE mg/ml). The present study is the first report on siderophore production in Indian haloarchaeal strains. Mechanism of iron assimilation in four non-siderophore isolates still needs to be investigated further.
Page(s): 340-344
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Source:IJEB Vol.44(04) [April 2006]

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