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Indole-3-acetic acid production by gel-entrapped bacillus thuringiensis in the presence of rock phosphate ore
University of Granada, Granada, Spain.
Mälardalen University.
University of Granada, Granada, Spain.
2007 (English)In: Chemical Engineering Communications, ISSN 0098-6445, E-ISSN 1563-5201, Vol. 194, no 4, 441-445 p.Article in journal (Refereed) Published
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Abstract [en]

Bacillus thuringiensis in entrapped in k-carrageenan was capable of producing indole-3-acetic acid (IAA) in the presence of rock phosphate ore (RPO). After five repeated batch fermentation experiments, an average of 6.9 mg/L IAA was recorded in the presence of 1.5 g/L RPO and 4.7 mg/L IAA in the RPO-free control. The bacterium simultaneously solubilized phosphates with a maximum soluble P of 115 mg/L and 150 mg/L after the fourth batch cycle in 1.5 and 3.0 g/L RPO amendment, respectively. Addition of tryptophan to the media increased IAA production to 13.9 and 20.7 mg/L per batch on RPO-free and 1.5 g/L RPO-supplemented media with poor bacterial growth and RPO solubilization.

Place, publisher, year, edition, pages
2007. Vol. 194, no 4, 441-445 p.
Keyword [en]
Bacillus thuringiensis, Batch fermentation, Gel entrapment, IAA production, Phosphate solubilization, Acetic acid, Acids, Amino acids, Biochemical engineering, Fermentation, Gelation, Gels, pH effects, Phosphate ore treatment, Solubility, Bacteriology
Identifiers
URN: urn:nbn:se:mdh:diva-31750DOI: 10.1080/00986440600983486ISI: 000245642500002Scopus ID: 2-s2.0-67650548677OAI: oai:DiVA.org:mdh-31750DiVA: diva2:936527
Available from: 2016-06-14 Created: 2016-06-07 Last updated: 2016-11-01Bibliographically approved

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