Study Of The Of The Biological Activity Of 1-OCTEN-3-OL In Penicillium Canescens

This work reports for the first time that Penicillium canescens synthesises a probable quorum sensing substance (QRS) 1-octen-3-ol. The impact of this molecule on the morphological changes of this fugus and its biosynthesis of industrial metabolites endo-?-(1, 4)-xylanase and ?-galactosidase was highlighted. After seven days of culture, 11 ± 1 and 17 ± 1 µg of 1-octen-3-ol/ml were quantified in 863 and in submerged fermentation media (SFM), respectively. In solid-state fermentation (SSF), 10 5 , 106 and 107 spores/g as initial inoculum caused the productions of 363 ± 36, 636 ± 39 and 1000 ± 38 µg of 1-octen-3-ol/g of soya oil cake, respectively. However, under growth circumstances, the level of 1-octen-3-ol was too weak (inferior to 84 µg/ml on 863 medium and 5859 µg/g of soya oil cake, respectively) to influence the growth of P. canescens and its production of endo-?-(1, 4)-xylanase and ?-galactosidase. Also, the inductive conidiation effect of 1-octen-3-ol was not obvious, and so, it can't be considered as a quorum sensing substance in P. canescens .