Observations en culture sur les phases initiales de développement de Peyssonnelia squamaria

The present study attempts to determine the factors which induce spores in the genus Peyssonnelia to undergo two different forms of embryogeny. Carpospores and tetraspores of P. squamaria (Gmelin, 1768) Decaisne, 1841 were cultivated, and two types of development noted: the Dumontia type, typical of prevalently saxicolous thalli, and the Naccaria type, observed in plants growing as emi-endophytes. This is the first time that this phenomenon has been observed in the Peyssonneliaceae.

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Travail realisé par la contribution du C.N.R.