Summary
This is a report of a light and electron microscopic study of mitosis in the basidiomycetous fungusTulasnella araneosa. The study employs serial section analyses of nuclei preselected with fluorescence microscopy. It is the first such study of nuclear division in theTulasnellaceae and the first of conjugately dividing nuclei in basidiomycetous hyphal segments lacking clamp connections. Mitosis inT. araneosa is unusual in that the spindle pole body (SPB) develops asymmetrically; the SPB middle piece is large and transversely curved; and the nuclear envelopes of adjacent late anaphase nuclei fuse. Analyses of mitotic characteristics used for phylogenetic purposes indicate that, of the many characters available, only SPB characteristics are presently valuable. Available evidence indicates that the SPB ofT. araneosa is more different from that ofUredinales than it is from representatives of the other four orders ofBasidiomycotina that have been thoroughly studied.
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Taylor, J.W. Mitosis in the basidiomycete fungusTulasnella araneosa . Protoplasma 126, 1–18 (1985). https://doi.org/10.1007/BF01287668
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DOI: https://doi.org/10.1007/BF01287668