Also, the study's results provide tantalizing new insights into the evolutionary pathway that flowering plants took 135 million years ago when they split off from gymnosperms, the "naked-seeded" plant group that includes conifers, cycads and ginkgo trees. (ucdavis.edu)
These innovations define key turning points in the history of green plants, and they are what separate the major plant groups: green algae, mosses and liverworts, ferns, gymnosperms and flowering plants. (nybg.org)
Woody, usually tall, perennial higher plants (Angiosperms, Gymnosperms, and some Pterophyta) having usually a main stem and numerous branches. (bvsalud.org)
At present, 242 families and 8.274 taxa, distributed in angiosperms (92.56%), ferns and fern allies (6.23%) and gymnosperms (1.21%), constitute the MGC-Cormof collection. (gbif.org)
We measured standing fine-root biomass and annual fine-root production across 41 assemblages of 12 tree species, representing both angiosperms and gymnosperms originating from North America and Europe. (umn.edu)
In general, annual productivity of mixtures of species that were less productive in monoculture had neutral (angiosperms) to positive (North American species: +16%) responses to mixing, whereas annual productivity of mixtures of species that were more productive in monoculture had neutral (European species) to negative (gymnosperms: −6%) responses to mixing. (umn.edu)
In North America, belowground productivity of young forests composed of angiosperms and native tree species may be more tightly linked to diversity than that of forests dominated by gymnosperms or European species. (umn.edu)
It exists in most gymnosperms except some species of Podocarpus (Xi & Wang, 1989). (aroid.org)
In a diverse taxonomic range of tree species, including representative species of ancient families of angiosperms (Magnolia x soulangiana Soul. (who.int)
The haploid pollen and ovule produced by a flower are thought to contain the remains of the gametophyte generation which was typical of the ancestors of the angiosperms (up to and including ferns). (tripod.com)
Seeds1
The important events in the evolution of the angiosperms were the evolution of showy flowers (to attract insects and birds), the evolution of bilaterally symmetrical flowers (adaptation for specialized pollinators), and the evolution of larger and more mobile animals (to disperse fruits and seeds). (tripod.com)
and gymnosperms (Ginkgo biloba L.), oxidase activity was associated with cell walls of developing xylem and was enriched in extracts of cell wall-associated glycoproteins. (who.int)
Pollination1
The angiosperms developed a close contact with insects which promoted cross-pollination and resulted in more vigorous offspring. (tripod.com)
Differences1
These differences translated into angiosperm mixtures overyielding in standing biomass by 16% but no effects of mixing on gymnosperm mixtures. (umn.edu)
Distinct1
He observed Brownian movement in 1827, discovered the cell nucleus in 1831, and was the first to recognize gymnosperm as a distinct angiosperm. (infoplease.com)
Diversity2
This suggests that increased diversity may lead to the greatest enhancement of belowground productivity in native, North American forests dominated by angiosperms, but also that declines in diversity may be felt most strongly in these forests as well. (umn.edu)
This course intends to update and deepen the participants' knowledge with respect to the diversity, phylogeny and systematics of ferns, gymnosperms and angiosperms. (lu.se)
Trees1
Gymnosperms are also known as cone-bearing trees, they provide mainly softwoods such as pine and spruce. (bartleby.com)
Families1
The angiosperm families are presented with special emphasis on cultivated representatives. (lu.se)
Produce1
The angiosperms, therefore, cannot produce asexual spores and there is no obvious alternation of generations. (tripod.com)
Evolution1
I spent last summer and fall as an intern working with Vice President and Cullman Curator Dennis Stevenson, Ph.D., on the Gymnosperm Seed Evolution Project at The New York Botanical Garden. (nybg.org)
Provide1
We hypothesize that SL provide a decisive selective advantage over ferns in arid environments, resulting in the decline of ferns and the rise of gymnosperms. (bvsalud.org)
Type1
This granular type of infrastructure, much like the granular wall structure found in the Nymphaeaceae, Magnoliaceae, and Annonaceae (Zavada, 1983), is found commonly in gymnosperms (Xi & Wang, 1989). (aroid.org)