Summary
Incubation of spores ofCeratodon in 0.1% sucrose solution in darkness causes the formation of abundant filamentous bundles with an average width of 0.39±0.02 μ. The center-to-center distance of adjacent filaments is 216±1.4 Å. The individual filaments have an electron-dense tubular part with a diameter of 108±0.6 Å. Dictyosome-derived coated vesicles, which enlarge to ER-like coated tubuli, are always associated with the filaments. In younger cultures these electron-dense coated tubuli seem to spin filaments from their sides.
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Valanne, N. Environmentally induced formation of plasmatic filaments in the protonema ofCeratodon purpureus . Protoplasma 73, 97–105 (1971). https://doi.org/10.1007/BF01286415
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DOI: https://doi.org/10.1007/BF01286415