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Impact of interacting climate change factors on growth and ochratoxin A production byAspergillus sectionCircumdati andNigri species on coffee
in World Mycotoxin JournalSearch for other papers by A. Akbar in
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The objectives of this study were to evaluate the effect of interacting climate change (CC) factors (water stress [water activity, aw; 0.99-0.90]); temperature [30, 35 °C]; and elevated CO2 [400 and 1000 ppm] on (1) lag phases prior to growth, (2) growth and (3) ochratoxin A (OTA) production by species ofAspergillus sectionsCircumdati andNigri on coffee-based media and stored coffee beans. The lag phases, prior to growth, of all strains/species were slightly increased as aw, temperature and CO2 were modified. The interacting CC factors showed that most strains/species examined grew well at 30 °C and slightly less so at 35 °C except forAspergillus niger (A 1911) which could tolerate the higher temperature. In addition, the interaction of elevated CO2 (1000 ppm) + temperature (35 °C) increased OTA production when compared with 30 °C but only for strains ofAspergillus westerdijkiae (B2),Aspergillus ochraceus (ITAL 14) andAspergillus steynii (CBS 112814). Most of the strains had optimum growth at 0.95 aw at 35 °C, while at 30 °C the optimum was at 0.98 aw. On stored coffee beans there was only a significant stimulation of OTA production byA. westerdijkiae strains in elevated CO2 (1000) at 0.90 aw. These results suggest differential effects of CC factors on OTA production by species in the SectionsCircumdati andNigri in stored coffee and that for most species there is a reduction in toxin production.
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| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 487 | 149 | 15 |
| Gesamttextansichten | 60 | 1 | 0 |
| PDF-Downloads | 35 | 3 | 0 |
Impact of interacting climate change factors on growth and ochratoxin A production byAspergillus sectionCircumdati andNigri species on coffee
in World Mycotoxin JournalSearch for other papers by A. Akbar in
Current site
Google Scholar
PubMed
Search for other papers by A. Medina in
Current site
Google Scholar
PubMed
Search for other papers by N. Magan in
Current site
Google Scholar
PubMed
The objectives of this study were to evaluate the effect of interacting climate change (CC) factors (water stress [water activity, aw; 0.99-0.90]); temperature [30, 35 °C]; and elevated CO2 [400 and 1000 ppm] on (1) lag phases prior to growth, (2) growth and (3) ochratoxin A (OTA) production by species ofAspergillus sectionsCircumdati andNigri on coffee-based media and stored coffee beans. The lag phases, prior to growth, of all strains/species were slightly increased as aw, temperature and CO2 were modified. The interacting CC factors showed that most strains/species examined grew well at 30 °C and slightly less so at 35 °C except forAspergillus niger (A 1911) which could tolerate the higher temperature. In addition, the interaction of elevated CO2 (1000 ppm) + temperature (35 °C) increased OTA production when compared with 30 °C but only for strains ofAspergillus westerdijkiae (B2),Aspergillus ochraceus (ITAL 14) andAspergillus steynii (CBS 112814). Most of the strains had optimum growth at 0.95 aw at 35 °C, while at 30 °C the optimum was at 0.98 aw. On stored coffee beans there was only a significant stimulation of OTA production byA. westerdijkiae strains in elevated CO2 (1000) at 0.90 aw. These results suggest differential effects of CC factors on OTA production by species in the SectionsCircumdati andNigri in stored coffee and that for most species there is a reduction in toxin production.
| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 487 | 149 | 15 |
| Gesamttextansichten | 60 | 1 | 0 |
| PDF-Downloads | 35 | 3 | 0 |
