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Conidiation of Penicillium camemberti in submerged liquid cultures is dependent on the nitrogen source

Abstract : To study the ability of a commercial Penicillium camemberti strain, used for Camembert type cheese ripening, to produce conidia during growth in liquid culture (LC), in media containing different sources of nitrogen as, industrially, conidia are produced by growth at the surface of a solid state culture because conidiation in stirred submerged aerobic LC is not known. In complex media containing peptic digest of meat, hyphae ends did not differentiate into phialides and conidia. Contrarily, in a synthetic media containing KNO3 as sole nitrogen source, hyphae ends differentiated into phialides producing 0.5 x 10(7) conidia/ml. Conidia produced in LC were 25 % less hydrophobic than conidia produced in solid culture, and this correlates with a seven-times-lower expression of the gene rodA encoding hydrophobin RodA in the mycelium grown in LC. Conidiation of P. camembertii is stimulated in iquid medium containing KNO3 as sole source of nitrogen and therefore opens up opportunities for using liquid medium in commercial productions.
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https://hal-univ-bourgogne.archives-ouvertes.fr/hal-01482671
Contributeur : Pam - Université de Bourgogne <>
Soumis le : vendredi 3 mars 2017 - 16:55:35
Dernière modification le : lundi 20 juillet 2020 - 13:06:04

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Khadidja Boualem, Steve Labrie, Patrick Gervais, Yves Waché, Jean-François Cavin. Conidiation of Penicillium camemberti in submerged liquid cultures is dependent on the nitrogen source. Biotechnology Letters, Springer Verlag, 2016, 38 (2), pp.329 - 335. ⟨10.1007/s10529-015-1983-1⟩. ⟨hal-01482671⟩

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