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New results have added to our knowledge about the gametophyte-sporophyte junction in bryophytes, hornworts and pteridophytes and its significance for archegoniate land plant evolution. Bryophyta (liverworts and mosses) show a uniform structure: the sporophyte foot is separated from the surrounding gametophyte tissue by a placental space. At maturity the space is in most cases filled with residues...
The sporophytes of Buxbaumia viridis are covered with a cuticle-like skin, which is peeling off when the capsules are ripe. Scanning electron microscopy (SEM) analysis showed that the supposed peeling of the cuticle of ripe capsules is not restricted to the cuticle, but to the complete epidermis. Additionally the SEM investigations showed that the capsule epidermis is covered by epicuticular wax crystals...
Asexual reproduction s. l. is widespread in plants and also a basic reproductive mechanism in bryophytes. Today, three types of asexual reproduction are recognized: (1) the asexual reproduction s. str. by regeneration from±specialized caducous organs (leaves, leaf apices, shoots, branches, bulbils) and by production of specialized propagules (gemmae, protonemal brood cells, tubers), (2) fragmentation...
The extent and seasonal pattern of asexual reproduction and ability to germinate in the rare liverwort Lophozia ascendens and the common liverworts L. ventricosa and L. longiflora were studied in the Boubínský prales National Nature Reserve in Šumava Mts. (Bohemian Forest), South Bohemia, Czech Republic. Asexual reproduction was quantified as the number of gemmae produced per individual shoot. Numbers...
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