Volume 10 Part 1 Article 45: Mycelial Growth in Amanita caesarea

Volume 10 Part 1 Article 45
Year 1979
Title: Mycelial Growth in Amanita caesarea
Author: C. Thielke


On germination many basidiospores produce a mycelium (the primary one) which may at first be multinucleate, in some cases uninucleate segments may appear. The nuclei in a given haploid mycelium normally are derived from the original single nucleus so that all are identical, or homokaryotic. In many fungi fusion of two different mating types is necessary to obtain normal fruiting. As a result of the somatogamy a mycelium develops with binucleate cells each segment containing two compatible nuclei. Such dikaryotic mycelia are characterized by clamp connections at each septum. This secondary mycelium ought to be able to produce fruit-bodies. If one isolates a mycelium from a fruitbody it should be a dikaryotic one. There are, however, many modifications. In few cases mycelia are able to develop more than one clamp at each cross wall. This was refered to Coniophora cerebella, Stereum hirsutum (Kniep, 1928) and to a Coprinus species (Brunswik, 1924). The fact that such whorls of clamps were detected in a mycelium of Amanita caesarea causes research in this fungus. Moreover, the mycelium deals with some peculiarities that are described below.

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