Modelling the effect of temperature and water activity on growth of Aspergillus niger strains and applications for food spoilage moulds

Journal of Applied Microbiology
R Parra, Naresh Magan

Abstract

To develop a model for the combined effect of water activity (a(w)) and temperature on growth of strains of Aspergillus niger, and comparison with data on food spoilage moulds in the literature. An extended combined model describing the growth of two strains of A. niger, as a function of temperature (25-30 degrees C) and a(w) (0.90-0.99) was developed. The growth rate (micro) was expressed as the increase in colony radial growth per unit of time. This extends the previous square root model showing the relationship between temperature and bacterial growth rate developed by Ratkowsky et al. (1983) and the parabolic relationship between the logarithm of the growth rate and a(w) developed by Gibson et al. (1994). A good correlation between the experimental data and the model predictions was obtained, with regression coefficients (r(2)) > 0.99. In addition, the use of this model allowed predictions of the cardinal a(w) levels: a(w(min)), and a(w(opt)). The estimation of the minimum a(w) levels (a(w(min))) was in accordance with data in the literature for similar and a range of other Aspergillus and related species, regardless of the solutes used for a(w) modification. The estimation of the optimal a(w) (a(w(opt))) and the optimal gr...Continue Reading

References

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Citations

Dec 8, 2005·Food Additives and Contaminants·Naresh Magan, David Aldred
Jul 13, 2014·International Journal of Food Microbiology·Stéphane DagnasJeanne-Marie Membré
Sep 20, 2011·International Journal of Food Microbiology·Daiana GarciaSonia Marín
Apr 24, 2010·International Journal of Food Microbiology·Maria Gougouli, Konstantinos P Koutsoumanis
Oct 20, 2009·Food Microbiology·Daiana GarciaSonia Marín
Nov 23, 2007·International Journal of Food Microbiology·Philippe Dantigny, Maurice Bensoussan
Jun 2, 2006·International Journal of Food Microbiology·P BattilaniN Magan
Jan 31, 2006·International Journal of Food Microbiology·A EstebanF J Cabañes
Nov 4, 2015·The Science of the Total Environment·Jennifer QuirósRoberto Rosal
Feb 1, 2017·Critical Reviews in Food Science and Nutrition·Jia LiuQi Wang
Jun 5, 2016·Applied and Environmental Microbiology·D C AryaniM H Zwietering
Aug 19, 2014·Environmental Microbiology Reports·Andrew Stevenson, John E Hallsworth
Dec 10, 2019·Critical Reviews in Microbiology·Ana Catarina PinheiroMaria Filomena Macedo
Mar 7, 2013·Journal of Food Protection·Stéphane Dagnas, Jeanne-Marie Membré
Apr 4, 2021·Microorganisms·Martina Koňuchová, Ľubomír Valík
Jul 21, 2021·MSystems·Mauricio Cruz-LoyaPamela J Yeh
Jul 13, 2021·Journal of Basic Microbiology·Behnam KamkarÁlvaro López-Bernal

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