Efficacy of different caffeine concentrations on growth and ochratoxin A production by Aspergillus species

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dc.contributor.authorAkbar, Asya Hussain
dc.contributor.authorMedina-Vayá, Ángel
dc.contributor.authorMagan, Naresh
dc.date.accessioned2016-07-05T16:20:04Z
dc.date.available2016-07-05T16:20:04Z
dc.date.issued2016-06-03
dc.description.abstractThe objective of this study was to evaluate the effect of different caffeine concentrations (0–4%) on (i) lag phase prior to growth, (ii) growth rates and (iii) ochratoxin A (OTA) production by strains from the Aspergillus section Circumdati and Aspergillus section Nigri groups, isolated from coffee, when grown on a conducive medium at 0·98 water activity and 30°C. The lag phases prior to growth increased with caffeine concentration. A strain of Aspergillus niger and Aspergillus carbonarius were the most sensitive to caffeine with growth being inhibited by <1% caffeine. For strains of Aspergillus westerdijkiae, Aspergillus ochraceus and Aspergillus steynii, although growth was inhibited significantly, some growth (10–15% of controls) occurred in 4% caffeine. OTA production was significantly inhibited by only 0·5% caffeine for strains of A. westerdijkiae, A. niger and A. carbonarius. For A. steynii at least 1·5% caffeine was required to inhibit OTA production. In contrast, for the strain of A. ochraceus there was a stimulation of OTA at 3% with a reduction at 4% caffeine. These results are discussed in the context of the different concentrations of caffeine found in Arabica and Robusta coffee and the development of minimization strategies.en_UK
dc.identifier.citationAkbar, A., Medina, A., Magan, N. (2016) Efficacy of different caffeine concentrations on growth and ochratoxin A production by Aspergillus species, Letters in Applied Microbiology, Vol. 63, Iss. 1, July 2016, pp. 25-29en_UK
dc.identifier.issn0266-8254
dc.identifier.urihttp://dx.doi.org/10.1111/lam.12586
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/10091
dc.language.isoenen_UK
dc.publisherWileyen_UK
dc.rightsAttribution-NonCommercial 4.0 Internationalen_UK
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectAspergillusen_UK
dc.subjectCaffeine concentrationen_UK
dc.subjectGrowthen_UK
dc.subjectLag phaseen_UK
dc.subjectOchratoxin Aen_UK
dc.titleEfficacy of different caffeine concentrations on growth and ochratoxin A production by Aspergillus speciesen_UK
dc.typeArticleen_UK

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