Visualization of Hyphal Sheath in Wood-Decay Hymenomycetes. II. White-Rotters

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Abstract
Hyphae of each of 5 isolates representing 5 spp. [Phanerochaete chrysosporium, Coriolus versicolor, Phellinus pini, Pycnoporus sanguineus, Xylobolus frustulatus] of white-rot fungi had hyphal sheaths when grown in axenic culture. Sheaths were most evident when hyphae were appressed against a solid substrate such as steel, glass, cotton or agar. The amount of sheath around hyphae varied among isolates. Most sheaths were fine fibrillar in texture, but often inclusions were present which altered the histological appearance. Only 2 isolates had protoplasmic inclusions from autolyzing hyphae within the sheaths. Necrotic cells occurred but lacked sheaths.

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