in order to study the effect of synorhizobium meliloti on growth and nutrients uptake of sesame, a greenhouse test was carried out. the first isolates investigated in iaa and siderophore producing and their ability in solubilizing inorganic phosphates. the results showed that all of isolates were able to produce auxin with different among. the maximum amount of iaa production was 59.5 g ml-1 th...

Pseudomonas aeruginosa (GRC1) isolated from potato rhizosphere, grew better on succinate medium than tryptic soy medium and produced hydroxamate type of siderophore in iron-deficient succinate medium. When the strain GRC1 was grown in the presence of different metal ion compounds, viz. ZnSO4, MnSO4, MnCl2 and FeCl3 at 6 and 12 microM concentrations individually, ZnSO4 (12 microM) promoted sider...

Maik Münzinger, Kambiz Taraz and Herbert Budzikiewicz* Institut für Organische Chemie der Universität zu Köln, Greinstr. 4, D-50939 Köln, Germany. Fax: + 4 9 -2 21 -470 -5057 . E-mail: [email protected] * Author for correspondence and reprint requests Z. Naturforsch. 54c, 867-875 (1999); received July 8, 1999 Ralstonia eutropha, Iron Transport, Siderophore, Staphyloferrin B The struct...

Bacteria have aggressive acquisition processes for iron, an essential nutrient. Siderophores are small iron chelators that facilitate cellular iron transport. The siderophore enterobactin is a triscatechol derivative of a cyclic triserine lactone. Studies of the chemistry, regulation, synthesis, recognition, and transport of enterobactin make it perhaps the best understood of the siderophore-me...

D. Risse, H. Beiderbeck, K. Taraz, H. Budzikiewicz3 and D. Gustineb a Institut für Organische Chemie der Universität zu Köln, Greinstr. 4, D-50939 Köln, Germany b USDA/ARS, 109 Pasture Research Laboratory, PSW M RL, University Park, PA 16802, USA Z. Naturforsch. 53c, 295-304 (1998); received March 6 , 1998 Corrugatin, Lipopeptide, Siderophore, Pseudomonas corrugata From the culture medium of th...

Various biochemical and biophysical studies have demonstrated the existence of a novel iron-uptake mechanism in Pseudomonas aeruginosa, different from that generally described for ferrichrome and ferric-enterobactin in Escherichia coli. This new iron-uptake mechanism involves all the proteins generally reported to be involved in the uptake of ferric-siderophore complexes in Gram-negative bacter...

A siderophore biosynthetic gene cluster was cloned from a metagenomic library generated from deep sea sediment. The gene cluster was successfully expressed in Escherichia coli to produce bisucaberin, a siderophore originally reported from the marine bacterium Alteromonas haloplanktis. The cloned bisucaberin biosynthetic gene cluster was moderately similar to that of the known bisucaberin produc...

Three non-ribosomal peptide synthetase genes, termed sidD, sidC and sidE, have been identified in Aspergillus fumigatus. Gene expression analysis by RT-PCR confirms that expression of both sidD and C was reduced by up to 90% under iron-replete conditions indicative of a likely role in siderophore biosynthesis. SidE expression was less sensitive to iron levels. In addition, two proteins purified...

G. Ehlert, K. Taraz, and H. Budzikiewicz Institut für Organische Chemie der Universität zu Köln, Greinstraße 4, D-50939 Köln, Bundesrepublik Deutschland Z. Naturforsch. 49c, 11-17 (1994); received October ll/December 20,1993 Catecholate Siderophore, Serratiochelin, Chrysobactin, Structure Elucidation, Serratia marcescens The catecholate siderophore serratiochelin isolated from an iron deficient...