of some Jamaican thelypteroid ferns.
Effects of sucrose and irradiance on germination and early gametophyte
growth of the endangered tree fern Dicksonia sellowiana Hook.
sellowiana, but details for the male gametophyte
developmental process are lacking.
Around 36 days after sowing, reproductive activity was observed with the presence of female gametangia in about 60% of adult cordate gametophytes
For each temperature tested, the influence of storage time on germination and development of laminar gametophytes
was evaluated and compared with the reference group.
The male gametophyte
equals the mature pollen grain that arises in the anther and consists of only three cells (i.
After five days the gametophytes
consisted of 4 to 6 cells.
1988) Several gametophytes
and young sporophytes were also found growing on the external surface of the mat of roots of the largest sporophyte individual (Fig.
Water relations are discussed in some detail with a focus on desiccation tolerance (very low cellular water content) of the gametophytes
Specific cells produced by the haploid gametophytes
are gametes, which may fuse with other gametes to form a diploid zygote.
Comparative research of gametophytes
of Olfersia alata and Olfersia cervina (Dryopteridaceae).
For example, an upregulation of phenylalanine-ammonia lyase, a key enzyme of the biosynthesis of aromatic compounds, was reported for Chondrus crispus gametophytes
after incubation with cell-free extracts of the endophytic pathogen Acrochaete operculata.