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Quelques consequences physiologiques de mutations affectant la reproduction du Penicillium baarnense van Beyma

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Abstract

The emergence of penicilli and cleistothecia inPenicillium baarnense is governed by several genes which have been detected by mutagenesis. The morphological aspect of this fungus, as it results of the function of these genes, can be transformed by acting on physicochemical environment. Particularly, condidiogenesis occurs in genetically non-conidial strains, when the medium is modified. With conidial strains, it can be suppressed when some chemicals are added to the culture medium. Compared physiological studies of mutant and wild-type strains show that mutations affect the level of cytoplasmic ATP and the specific activities of transaminases and glutamic-acid dehydrogenase (NAD dependant).

Résumé

La formation des deux appareils de reproduction, sexuel et conidien, duPenicillium baarnense dépend de gènes détectés par mutation. L'expression de ces gènes peut être affectée par'l environnement dans lequel le Champignon se développe. En particulier, il est possible de faire apparaître des structures conidiennes chez des mutants génétiquement aconidiens en modifiant la composition du milieu de culture. L'étude physiologique des mutants induits et de la souche sauvage montre que les déficiences géniques se traduisent par des diminutions du taux d'ATP mycélien ainsi que par des modifications de l'activité des transaminases et de la glutamate-deshydrogénase liée au NAD.

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Authors and Affiliations

  1. Laboratoire de Morphologie Expérimentale Végétale associé au C.N.R.S. Groupe des Laboratoires de Biologie Expérimentale — Faculté des Sciences, 91 - Orsay, France

    Denise Parisot

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  1. Denise Parisot
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Parisot, D. Quelques consequences physiologiques de mutations affectant la reproduction du Penicillium baarnense van Beyma. Mycopathologia et Mycologia Applicata 46, 33–52 (1972). https://doi.org/10.1007/BF02051894

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  • DOI: https://doi.org/10.1007/BF02051894

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