Influence of iron on siderophore and photosynthetic pigments biosynthesis by siderophore-producing Rhodopesudomonnas palustris

• Published in: Wei sheng wu hsüeh pao Vol. 54; no. 4; p. 408
• Main Authors: Hu, Bihui, Zhao, Chungui, Yang, Suping
• Format: Journal Article
• Language: Chinese
• Published: China 04.04.2014
• Subjects: Bacteriochlorophylls - biosynthesis; Bradyrhizobiaceae - growth & development; Bradyrhizobiaceae - metabolism; Iron - metabolism; Photosynthesis; Siderophores - metabolism
• ISSN: 0001-6209

To explore the regulation of iron on siderophore production, cell growth and photosynthetic pigments biosynthesis by siderophore-producing anoxygenic phototrophic bacteria. Siderophore production was determined using Chrome Azurol S (CAS) assay. The siderophore types were determined by Arnow method, Csaky test and Shenker test. The compositions and contents of photosynthetic pigments were determined by spectrophotometry and HPLC analysis. Rhodopseudomonas palustris (Rps. palustris) CQV97 was capable of producing hydroxamate-type of siderophore. Siderophore production reached the highest yield in the absence of ferric chloride. With increasing ferric chloride concentrations, the lag phase of cell growth was shortened, and the cell growth rate, final biomass and the total amounts of carotenoid and bacteriochlorophyll a were increased significantly. The characteristic absorption maxima of carotenoids from pigment extracts were blueshifted. Iron concentration had little effect on the compositions and relative con