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Influence of the water activity of a solid substrate on the growth rate and sporogenesis of filamentous fungi
Author(s) -
Gervats P.,
Molin P.,
Grajek W.,
Bensoussan M.
Publication year - 1988
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260310510
Subject(s) - sporogenesis , mycelium , trichoderma viride , substrate (aquarium) , limiting , water activity , spore , botany , biology , chemistry , ecology , water content , mechanical engineering , geotechnical engineering , engineering
The water activity ( a w ) of substrates has been related to the mycelial growth and the sporogenesis of two molds. In the absence of other limiting factors, optimal a w values were determined for growth and sporogenesis as 0.99 and 0.98, respectively, for Trichoderma viride TS and 0.97 and 0.96 for Penicillium roqueforti . In all cases, the accuracy of the optimal value would justify the regulation of this parameter. A model was proposed which establishes a relationship between the mycelial growth and the water activity value of the substrate.