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Recherche des besoins en eau chez quelques moisissures des grains

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Résumé

Le comportement de 13 champignons a été étudié à 22° C, en conditions hydriques variables (65 à 100 % H.R.).

La comparaison des croissances linéaires de ces espèces permet leur répartition en:

  • espèces hygrophiles (Epicoccum nigrum, Mucor circinelloides, Trichothecium roseum) dont l'optimum de croissance se situe à 100 %.

  • espèces mésophiles (Alternaria tenuissima, Cladosporium cladoporioides, Penicillium cyclopium, P. spinulosum) dont l'optimum est compris entre 95 et 100 % H.R.

  • espèces xérophiles (Aspergillus conicus, A. echinulatus, A. repens, A. restrictus, A. versicolor etHemispora stellata) à croissance optimale en deçà de 95 % H.R.

Les notions de xérophilie, de xérotolérance et d'osmophilie sont discutées.

Summary

Determination of water requirements in grain storage fungi.

The behaviour of 13 fungi is examined at 22° C, in different hydrous conditions (65 to 100 % R.H.). Specific linear growths correspond with the following groups:

  • hygrophilic species (Epicoccum nigrum, Mucor circinelloides, Trichothecium roseum) the optimum growth of which is 100 % R.H.

  • mesophilic species (Alternaria tenuissima, Cladosporium clado-sporioides, Penicillium cyclopium, P. spinulosum) the optimum is 95 to 100 % R.H.

  • xerophilic species (Aspergillus conicus, A. echinulatus, A. repens, A. restrictus, A. versicolor, Hemispora stellata) with optimum growth below 95 % R.H.

Concepts of xerophily, xerotolerance and osmophily are discussed.

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Authors and Affiliations

  1. Laboratoire de Biologie Végétale, Faculté des Sciences, Brest, France

    J. Pelhate

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  1. J. Pelhate
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Pelhate, J. Recherche des besoins en eau chez quelques moisissures des grains. Mycopathologia et Mycologia Applicata 36, 117–128 (1968). https://doi.org/10.1007/BF02049677

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