Abstract

VIVERO-BARON, Janet et al. Following of life cycle of Woodsia mollis (Kaulf.) J. Sm. (Athyriaceae-Pteridophyta) in three natural substrates. Polibotánica [online]. 2012, n.33, pp.75-83. ISSN 1405-2768.

The Woodsia mollis life cycle (Kaulf.) J. Sm. is described. The specimens were collected at a montane rain forest from Coajomulco. Huitzilac municipality, Morelos state. México. Their spores were sown in small glass containers with three natural substrates (plant litter, maquique and moss). The cycle was typically isosporic with Drynaria type prothallial development. The gametophytes were cordate and circular-cordate; the antheridia were obtained in maquique substrate since 99 days, and starting from 130 days in moss media, but in plant litter they were not developed. Archegonia were obtained in moss substrate since 81 days, 153 days in maquique and 185 days in plant litter. Young sporophytes were obtained exclusively in moss substrate since 296 days. It appears that this species needs a specific substrate and in this experiment the moss media was the best. Previous papers cited the importance of calcium for the development of some Woodsia species and it is known that mosses generally retain calcium carbonate.

Keywords : life cycle; Woodsia mollis; gametophyte and sporophyte development; moss culture.

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