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1 June 2009 Juvenile gametophyte development in the Blasiales. 3. Sporeling ontogeny of Cavicularia densa
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Abstract

Sporeling development in Cavicularia densa was determined using controlled culture and light microscopy techniques. Ontogeny is typified by endosporic germination followed by early protonematal development via the production of a terminal quadrant of four cells which ruptures the spore wall distally. Sporeling production is triggered by the delimitation of a cuneate apical cell in one of the quadrants. Regular apical cell segmentation produces derivatives and adult merophytes that ultimately result in a juvenile Cavicularia gametophyte. The fundamental sporeling pattern exhibited by Cavicularia is shared only with that of its sister genus Blasia. Moreover, the patterns of sporeling and gemma/gemmaling ontogeny in Cavicularia and Blasia share quadrant systems of precise uniformity, thus reinforcing the close relationship between the blasialean genera.

Sharon E. Bartholomew-Began "Juvenile gametophyte development in the Blasiales. 3. Sporeling ontogeny of Cavicularia densa," The Bryologist 112(2), 354-358, (1 June 2009). https://doi.org/10.1639/0007-2745-112.2.354
Received: 1 July 2008; Accepted: 1 October 2008; Published: 1 June 2009
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