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.
journal_name
Food Microbioljournal_title
Food microbiologyauthors
Judet D,Bensoussan M,Perrier-Cornet JM,Dantigny Pdoi
10.1016/j.fm.2008.05.007subject
Has Abstractpub_date
2008-10-01 00:00:00pages
902-7issue
7eissn
0740-0020issn
1095-9998pii
S0740-0020(08)00087-7journal_volume
25pub_type
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