Abstract
Summary In continuous red light provided from the beginning of sowing, spores of the fern Anemia phyllitidis develop one-dimensional multicellular filaments. In spores incubated in darkness after one day of red light, development ceases after formation of only one- to three-celled filaments. However, even after four weeks of dark incubation viability of such non-growing filaments is not lost and upon re-irradiation with red light growth is resumed which now leads to a large percentage of two-dimensional prothallia, and a first longitudinal cell wall was already observed after three days. After resumption of growth under green or yellow light, a certain percentage of non-growing protonemata also responds with two-dimensional morphology. Only after resumption of growth in far red light non-growing protonemata develop exclusively filamentously. The results are discussed in relation to a possible mediation by the blue light photoreceptor.
Published Version
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