The septa of the deuteromycete Wallemia sebi (Fr.) v. Arx have expanded pore margins surrounding a central pore and lack parenthesomes. At each end of the pore there is an electron-dense region with a distinct five-banded pattern (three electron-dense bands separated by two less-electron-dense bands) oriented parallel to the septum. These septa are compared with similar septa in phycomycetes, the dolipore septa reported in the ascomycetous yeast genus Ambrosiozyma and the dolipore–parenthesome septa of the basidiomycetes. It is proposed that the term dolipore be applied to any septum having expanded pore margins.
Electron microscopy of conidiogenesis in the thallic Hyphomycete Oidiodendron griseum Robak was done on material fixed in glutaraldehyde followed by OsO4. Endohyphae are found at the base of the stalk-like conidiophore. Arthroconidia are formed by basipetal and random septation of the preformed apical fertile hyphae. The thickening of these septa gives the appearance of connectives between adjacent arthroconidia.
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