Note 7 — INTRODUCTORY
Reading edition
The following germination periods are furnished by Dr. Constantineanu (Inaugural Dissertation ueber die Entwickelungsbedingungen der Myxomyceten; Halle, 1907).
Reticularia lycoperdon 30 to 60 min.
Fuligo ovata 30 to 90 min.
Stemonitis splendens 5 to 6 hrs.
Perichaena depressa 5 to 8 hrs.
Amaurochaete atra 6 to 10 hrs.
Arcyria incarnata 8 to 10 hrs.
Lycogala epidendrum to 60 hrs.
Physarum didermoides 1 to 10 da.
Dictydium cancellatum 1 to 20 da.
These records are for sowings in drop cultures, in distilled water, kept at temperature of 65°–70° F. (18°–20° C.).
Our own experiments have been made both with distilled water and tap-water with the advantage in favor of the latter. Dictydium cancellatum germinates in tap-water at temperature 70°–80° F. in 12–15 hours fresh from the field. Fuligo ovata spores were all swarming in about one hour at the same temperature. Jahn (Myxomycetenstudien; Ber. der Deutschen Bot. Ges. Bd. XXIII., p. 495) finds that the germination in some cases as Stemonitis species, is hastened by wetting, then drying, then wetting again.
Pinoy thinks microbes aid in germination (Bull. Soc. Myc. de France T. XVIII.).