The gametophytes of Arthromeris himalayensis are long lived (more than 110 days), and the advantage of long-lived gametophytic
generation is to promote cross-fertilization (Klekowski, 1973, 1979).
With the encapsulation dehydration protocol, there was good survival of gametophytic
tissue, with or without preculture on ABA, and this is similar to results found with gametophytes of several bryophytes, which do not require ABA preculture to survive encapsulation-dehydration freezing (Pence, 1998).
The first two are mostly controlled by the sporophytic genome, while the other two are primarily regulated by the gametophytic
In addition to triggering the embryogenic program, the cell must cancel the gametophytic
A comparative study of the gametophytic
generation in the Polystichum aculeatum group (Pteridophyta).
Hopkins and McBride (1976) reported that gametophytic
nuclei of C.
Second, their gametophytic
generation is independent from the maternal sporophytes.
This is very interesting, given the traditional lack of attention paid by taxonomists to gametophytic
characters, a fact that is likely attributable to their reduced levels of morphological variation.
Unlike most algae, the zygote of Coleochaete remains attached to the gametophyte, becoming surrounded by a layer of protective cells (of gametophytic
and sporophytic regeneration from scales of the fern Platycerium bifurcatum (Cav.
Distribution of gametophytic
populations of Vittaria and Trichomanes in Pennsylvania.
Additionally, ferns, especially in the gametophytic
phase, are considered good indicators of environmental changes in the forest due to their sensitivity to the microclimatic and edaphic parameters (Page, 1979a, b).