Browsing by Author "Dylewski, Daniel P."

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    Charles Edward Miller, 1925-1984
    Johnson, Terry W., Jr.; Dylewski, Daniel P. (Mycological Society of America, 1985)
    A professional lifetime is not fulfilled unless one is privileged to have had an associate from whom one learns the necessity of standards. The colleague who teaches by example, gentle cajoling, or outright insistence never to compromise accuracy and precision is indeed one of inestimable value. In his endlessly patient, tolerant, and flexible but exacting way, Charles Edward Miller was such a colleague. Whether one was an established investigator or a novice first testing the waters of mycology before plunging in, the treatment was the same: generous responsiveness and impartiality, a demand for responsible thought and evaluation, and an uncompromising principle that one could never lose face by being accurate.
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    The Ultrastructure of Meiosis in Woronina pythii (Plasmodiophoromycetes)
    Dylewski, Daniel P.; Miller, Charles E. (Mycological Society of America, 1984)
    During cleavage of cystogenous plasmodia, nuclei of Woronina pythii underwent one meiosis I-like division. The division was centric, closed with polar fenestrations, and characterized by the formation of synaptonemal complexes. Pachytene nuclei exhibited nuclear projections which were heretofore undocumented structural modifications of the nuclear membrane. Hypothetical functions of these structures are proposed. During diakinesis, fragmentation of the nuclear envelope occurred at the poles throught he apparent growth of microtubules. Intranuclear membranous vesicles appeared to bud from the inner membrane of the original nuclear envelope during metaphase and anaphase, and coalesced on the surfaces of the separating chromatin masses, thereby forming new daughter nuclear envelopes within the intact original nuclear envelope. Similar descriptions of the spindle apparatus and events relating to nuclear envelope breakdown and reformation have been reported for the mitotic divisions of W. pythii. Nuclei of some mature cysts contained intranuclear cisternae which were continuous with the inner membrane of the nuclear envelope, and these cisternae frequently partitioned the nuclei into two or three separate compartments. The formation of intranuclear cisternae was presumed to result in the eventual fission of nuclei, which may represent functionally the second meiotic division.