Plant growth promotion and fungicidal activity in a siderophore-producing strain of Proteus sp
Language English Country United States Media print
Document type Journal Article
PubMed
11501420
DOI
10.1007/bf02818723
Knihovny.cz E-resources
- MeSH
- Antifungal Agents isolation & purification metabolism pharmacology MeSH
- Fusarium drug effects pathogenicity MeSH
- Keto Acids isolation & purification metabolism pharmacology MeSH
- Plant Diseases microbiology MeSH
- Proteus physiology MeSH
- Plant Growth Regulators biosynthesis isolation & purification pharmacology MeSH
- Siderophores biosynthesis isolation & purification pharmacology MeSH
- Chromatography, High Pressure Liquid MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- alpha-ketoisocaproic acid MeSH Browser
- Antifungal Agents MeSH
- Keto Acids MeSH
- Plant Growth Regulators MeSH
- Siderophores MeSH
A proteus strain inhibited mycelial growth of Fusarium oxysporum in vitro. Seed bacterization showed significant plant growth promotion and Fusarium-wilt suppression activity of Phaseolus mungo in a gnotobiotic system. The culture filtrate of this strain exhibited three prominent bands in UV-VIS spectra between 300 and 400 nm. The growth promotion assay of the extracted compound against different indicator organisms indicated the production of a compound related to a 2-oxoacid-type siderophore. The HPLC of the purified ethyl acetate extract of the strains and standard 4-methyl-2-oxopentanoate (2-oxoisocaproate) revealed a single peak, similarly as the coinjection of the extract and the standard. The production of siderophore, probably 2-oxoisocaproate, was demonstrated.
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