Abstract
The ultrastructure of the hyphal tips of wild type and spreading colonial mutants (spco) ofNeurospora crassa was studied. The results suggest that the observed concentration of vesicles in the hyphal tips of wild type, cot 3, spco 1 and spco 12 is a consequence of the fact that in each strain the number of vesiclesper unit length of the long axis the hypha remains approximately constant. Spco 9 differed from the other strains in that a proportionally longer region of its hyphal tips contained a high concentration of vesicles.
There was a direct relationship between the length of the tapered region of the hyphal tips of the various strains and their extension rates; the tapered region of a tip probably represents the extension zone of the hypha and varied in length from about 2 μm (spco 12) to about 33 μm (wild-type).
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Collinge, A.J., Trinci, A.P.J. Hyphal tips of wild-type and spreading colonial mutants ofNeurospora crassa . Arch. Microbiol. 99, 353–368 (1974). https://doi.org/10.1007/BF00696249
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DOI: https://doi.org/10.1007/BF00696249