Summary
The dolipore and parenthesomes are major components of the septal apparatus in wild type homokaryon and dikaryon strains of Schizophyllum commune. The parenthesome lacuna contains a matrix material that produces a lamellar appearance. The domain between the pore and the parenthesome is normally devoid of any organelles or membrane material, but is traversed by a system of microfilaments. The filaments pass through the septal pore, which is obstructed by a pair of opposed occlusions. In the homokaryon carrying a B-factor mutation, which leads to septal degradation, the septa as initially synthesized appear normal apart from the intrusion of membranous vesicles into the pore domain. In those homokaryons which carry a modifier mutation, preventing septal degradation, in addition to the B-factor mutation, once again the pore domain is invaded by membraneous vesicles and in some cases the parenthesomes become disorganized.
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Marchant, R., Wessels, J.G.H. Septal structure in normal and modified strains of Schizophyllum commune carrying mutations affecting septal dissolution. Archiv. Mikrobiol. 90, 35–45 (1973). https://doi.org/10.1007/BF00424822
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DOI: https://doi.org/10.1007/BF00424822