The taxonomic position of Asterodon, Asterostroma and Coltricia inferred from the septal pore cap ultrastructure

The taxonomic position of Asterodon, Asterostroma and Coltricia inferred from the septal pore cap ultrastructure

The ultrastructure of the septal pore cap (SPC) of Asterodon, Asterostroma and Coltricia were examined to establish the taxonomic position of these genera. Asterostroma has dolipores with perforate SPCs and is classified in the Lachnocladiaceae. In contrast, Asterodon and Coltricia have dolipores wi...

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Bibliographic Details
Published in:Mycological research Vol. 104; no. 12; pp. 1485 - 1492
Main Authors: MÜLLER, Wally H., STALPERS, Joost A., van AELST, Adriaan C., de JONG, Margo D. M., van der KRIFT, Theo P., BOEKHOUT, Teun
Format: Journal Article
Language:English
Published: Oxford Cambridge University Press 01-12-2000
Elsevier Ltd
Elsevier
Subjects:
Asterodon
Asterostroma
Biological and medical sciences
Coltricia
Fundamental and applied biological sciences. Psychology
Fungi
Hymenochaetaceae
Lachnocladiaceae
Plant cytology, morphology, systematics, chorology and evolution
septal pore caps
Thallophyta
Fungi
Taxonomy
Ultrastructure
Interspecific comparison
Morphology
Basidiomycetes
Anatomy
Thallophyta
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Summary:The ultrastructure of the septal pore cap (SPC) of Asterodon, Asterostroma and Coltricia were examined to establish the taxonomic position of these genera. Asterostroma has dolipores with perforate SPCs and is classified in the Lachnocladiaceae. In contrast, Asterodon and Coltricia have dolipores with imperforate SPCs and belong to the Hymenochaetaceae. Other selected species of genera belonging to the Hymenochaetaceae like Hydnochaete, Coltriciella, Inonotus, Onnia, and Cyclomyces also contained imperforate SPCs. Coltriciella, Inonotus and Cyclomyces moreover presented a lamella of endoplasmic reticulum above the imperforate SPC after chemical fixation. Such a lamella could rarely be observed in Coltricia only after high-pressure freezing and freeze substitution. Cryofixed fungal cells of Cyclomyces and Coltricia showed differences in the architecture of the matrix of the SPC. Coltricia showed a more layered matrix structure than the SPC of Cyclomyces. In addition, transmission- and scanning electron microscopy revealed an indent in the centre of the imperforate SPC of Cyclomyces, indicating a reduced thickness, and resulting into a tented profile in cross-sections.
Bibliography:ObjectType-Article-2
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ISSN:0953-7562
1469-8102
DOI:10.1017/S0953756200002677