ArticleBiometals : an international journal on the role of metal ions in biology, biochemistry, and medicine2024
Buffer-free CAS assay using a diluted growth medium efficiently detects siderophore production and microbial growth.
Article in Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 6 citations in OpenAlex.
- Isolation and characterization of heavy metal-tolerant, plant growth-promoting bacteria and evaluation of the impact of lead [Pb(II)] on their functional traits.Archives of microbiology · 2026Article
- Isolation, identification, and plant growth-promoting mechanisms of strain BN5, with a focus on exogenously Trp-independent IAA biosynthesis, and its impact on cucumber cultivation.Current research in microbial sciences · 2026Article
- Tools to study microbial iron homeostasis and oxidative stress: current techniques and methodological gaps.Frontiers in molecular biosciences · 2025Review
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Authors and funding
4 authors at 1 institution in 1 country.
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Abstract
Siderophores are iron chelators and low-molecular-weight compounds secreted by various microorganisms under low-iron conditions. Many microorganisms produce siderophores in the natural environment as iron is an essential element for many of them. CAS assays are widely used to detect siderophores in cultures of various microorganisms; however, it is necessary to improve their sensitivity for the efficient application to fastidious microorganisms. We developed a simple, high-throughput CAS assay employing a buffer-free CAS reagent and diluted growth medium (10% dR2A) in a 96-well microplate. Using a diluted growth medium in agar plates suitable for iron-restricted conditions supported siderophore production by microorganisms from activated sludge. A buffer-free CAS reagent combined with a diluted growth medium revealed that these microorganisms tended to produce more siderophores or iron chelators than microorganisms under iron-rich conditions. Moreover, this buffer-free CAS assay easily and efficiently detected not only siderophore production but also the growth of fastidious microorganisms.
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