Distributions of the growth rate of the germ tubes and germination time of Penicillium chrysogenum conidia depend on water activity

Food Microbiology
Daniela JudetPhilippe Dantigny

Abstract

The effects of water activities for sporulation (a(wsp)) and germination (a(wge)) on the distributions of the growth rate of the germ tubes (mu) and the germination time (t(G)) of Penicillium chrysogenum conidia were determined by monitoring the length of the same germ tubes throughout the experiments automatically. No relationship between the individual t(G)'s and mu's could be established. Irrespective of the water activity for germination, mu was greater and t(G) was less for conidia produced at 0.95a(wsp) than that at 0.99a(wsp). At 0.99 a(wge) the mean and the standard deviation of t(G) were smaller than those obtained at 0.95a(wge). At 0.99a(wge), normal distributions for mu and t(G) were exhibited, but not at 0.95a(wge). The cumulative frequencies were used to reconstruct the germination curves. Great differences in the percentage of spores capable of germination (P(G)) and in the mean germination times between conidia produced at 0.95a(wsp) and at 0.99a(wsp) were clearly exhibited at 0.95a(wge), thus demonstrating the paramount influence of sporulation conditions on germination kinetics.

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Citations

Jul 19, 2012·World Journal of Microbiology & Biotechnology·Lanyu CuiMin Wang
Aug 2, 2011·Microbial Cell Factories·Thomas WucherpfennigRainer Krull
Jul 19, 2014·International Journal of Food Microbiology·J M R Apollo Arquiza, Jean Hunter
Jan 23, 2013·International Journal of Food Microbiology·Maria Gougouli, Konstantinos P Koutsoumanis
Sep 3, 2011·International Journal of Food Microbiology·Maria Gougouli, Konstantinos P Koutsoumanis
Mar 15, 2011·International Journal of Food Microbiology·Philippe DantignyMaurice Bensoussan
Dec 22, 2009·International Journal of Food Microbiology·Anderson de Souza Sant'AnaPilar Rodriguez de Massaguer
Oct 20, 2009·Food Microbiology·Daiana GarciaSonia Marín
Mar 22, 2016·Microbial Biotechnology·Karel A van LaarhovenOlaf C G Adan
Oct 26, 2016·International Journal of Food Microbiology·Nicolas Nguyen Van LongKarim Rigalma
Mar 7, 2013·Journal of Food Protection·Stéphane Dagnas, Jeanne-Marie Membré
Dec 28, 2016·Journal of Agricultural and Food Chemistry·John J BeckWai S Gee
Sep 6, 2017·MicrobiologyOpen·Karel A van LaarhovenOlaf C G Adan
Apr 1, 2020·Journal of Food Protection·Arianne MuscatVasilis P Valdramidis
Jun 8, 2021·Applied Microbiology and Biotechnology·Philip RuijtenOlaf C G Adan
Aug 20, 2019·Food Microbiology·Juliana Lane Paixão Dos SantosFrank Devlieghere

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