ISSN:
1432-0991
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Abstract The production of a catechol type of siderophore by an iron-depleted culture of cowpeaRhizobium decreased with the increase in the concentration of molybdenum in the growth medium above 1 mM. In vitro addition of molybdenum at pH 5 and 7 changed the absorbance maxima of siderophore, indicating the interaction of molybdenum with siderophore. Tungsten, which is a competitive inhibitor of molybdenum, was unable to dissociate the molybdenum-siderophore conjugate. In the presence of iron, siderophore increased the uptake of molybdenum. Under these conditions, the addition of 2,3-dihydroxybenzoic acid did not show an increase in the uptake. This suggests that an entire siderophore molecule is involved in the transport of molybdenum.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01573475
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