dc.contributor.author |
Akbar, Asya Hussain |
|
dc.contributor.author |
Medina-Vayá, Ángel |
|
dc.contributor.author |
Magan, Naresh |
|
dc.date.accessioned |
2016-07-05T16:20:04Z |
|
dc.date.available |
2016-07-05T16:20:04Z |
|
dc.date.issued |
2016-06-03 |
|
dc.identifier.citation |
Akbar, 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. 25-29 |
en_UK |
dc.identifier.issn |
0266-8254 |
|
dc.identifier.uri |
http://dx.doi.org/10.1111/lam.12586 |
|
dc.identifier.uri |
http://dspace.lib.cranfield.ac.uk/handle/1826/10091 |
|
dc.description.abstract |
The 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.language.iso |
en |
en_UK |
dc.publisher |
Wiley |
en_UK |
dc.rights |
Attribution-NonCommercial 4.0 International |
en_UK |
dc.rights.uri |
http://creativecommons.org/licenses/by-nc/4.0/ |
|
dc.subject |
Aspergillus |
en_UK |
dc.subject |
Caffeine concentration |
en_UK |
dc.subject |
Growth |
en_UK |
dc.subject |
Lag phase |
en_UK |
dc.subject |
Ochratoxin A |
en_UK |
dc.title |
Efficacy of different caffeine concentrations on growth and ochratoxin A production by Aspergillus species |
en_UK |
dc.type |
Article |
en_UK |