Blackmore and Barnes (1987) hypothesized that two factors contributed to evolution of the embryophyte
spore wall; transfer of the sporopollenin wall from zygotes to meiospores, and the fusion of single lamina into multilaminate walls.
Phylogenetic relationships of the liverworts (Hepaticae), a basal embryophyte
lineage, inferred from nucleotide sequence data of the chloroplast gene rbcL.
spore walls: origin, development, and homologies.
Then, in the subsequent section, I will revisit the question of the origin of embryophyte
life cycles from the perspective of our modern understanding of the phylogeny of embryophytes
and their algal relatives.
There is convincing evidence that, among Chlorophyta (s.l.), members of the Charophyceae (e.g., Coleochaete, Nitella, Chara) possibly offer critically important clues to landplant origin (Prescott, 1968; Graham, 1984, 1993); some authors (e.g., Bold et al., 1987) recognize the Charophyceae as "Charophyta," a division distinct from Chlorophyta, perhaps more closely related to embryophyte
plants (than other green algae).
In chapter one, "Evolutionary significance of bryophytes," the authors build a firm comparative morphological case regarding bryophytes as embryophytes
along with the other terrestrial plants, the vascular plants.
That would be ah il indictment.) * ([dagger]) bryo- of mosses (Bryophytes start out Bruce Young as embryophytes
.) ([dagger]) dari type of grain sorghum Dana Richards (var.
bryophytes: Are all embryophytes
('land plants') that are non-vascular: they have tissues and enclosed reproductive systems, but they lack vascular tissue.
(2) UMR CNRS 5143 Paleobiodiversite et paleoenvironnements, Paleobotanique - Paleoecologie /Paleodiversite, Systematique et Evolution des Embryophytes
, Universite Paris 6, case courrier 1201, 12 rue Cuvier, 75005 Paris, France
These two developmental processes have been described to occur in a broad spectrum of embryophytes
, from bryophytes to many flowering plant families.
[New character, derived from life-cycle variations among embryophytes