Results 11 to 20 of about 38,890 (303)

Phylogenomics and the rise of the angiosperms [PDF]

open access: yesNature
AbstractAngiosperms are the cornerstone of most terrestrial ecosystems and human livelihoods1,2. A robust understanding of angiosperm evolution is required to explain their rise to ecological dominance. So far, the angiosperm tree of life has been determined primarily by means of analyses of the plastid genome3,4.
Zuntini, A.R.   +252 more
core   +16 more sources

Dry Climate Filters Gymnosperms but Not Angiosperms through Seed Mass

open access: yesDiversity, 2023
In the context of climate change in recent years, the fate of woody plant seed has an important impact on forest regeneration. Seed mass is an important reproductive strategy of plants. There are huge differences between gymnosperms (mainly conifers) and
Yang Qi   +4 more
doaj   +2 more sources

Hydraulic consequences of vessel evolution in angiosperms [PDF]

open access: yes, 2007
We tested two hypotheses for how vessel evolution in angiosperms influenced xylem function. First, the transition to vessels decreased resistance to flow—often considered the driving force for their evolution.
Feild, Taylor S.   +4 more
core   +3 more sources

Pseudanthia in angiosperms: a review [PDF]

open access: yesAnnals of Botany, 2023
AbstractBackgroundPseudanthia or ‘false flowers’ are multiflowered units that resemble solitary flowers in form and function. Over the last century the term ‘pseudanthium’ has been applied to a wide array of morphologically divergent blossoms, ranging from those with easily noticeable florets to derived, reduced units in which individual flowers become
Jakub Baczyński   +1 more
openaire   +2 more sources

Water transport in vesselless angiosperms: conducting efficiency and cavitation safety

open access: yes, 2007
Two structure-function hypotheses were tested for vesselless angiosperm wood. First, vesselless angiosperm wood should have much higher flow resistance than conifer wood because angiosperm tracheids lack low-resistance torus-margo pits.
Field, T.   +5 more
core   +4 more sources

Wood from Angiosperms and Gymnosperms Shows Distinctive Lignin Peaks in Direct Analysis in Real Time (DART) Mass Spectra

open access: yes, 2022
A data set was constructed consisting of 3021 mass spectra randomly selected from the ForeST© (Forensic Spectra of Trees) database of mass spectra for wood analyzed by Direct Analysis in Real Time ionization coupled with time-of-flight mass spectrometry (
Edgard, Espinoza   +3 more
core   +1 more source

The root of the angiosperms revisited [PDF]

open access: yesProceedings of the National Academy of Sciences, 2002
Most recent phylogenetic analyses of basal angiosperms have converged on the placement ofAmborellaas sister to all other extant angiosperms. However, certain recent studies suggest thatAmborellaand Nymphaeales (water lilies) form a clade sister to all remaining angiosperms or that Nymphaeales alone are the sister to the remaining angiosperms. We report
Michael J, Zanis   +4 more
openaire   +2 more sources

Past connections with the mainland structure patterns of insular species richness in a continental‐shelf archipelago (Aegean Sea, Greece)

open access: yesEcology and Evolution, 2021
Recent research in island biogeography has highlighted the important role of late Quaternary sea‐level fluctuations in shaping biogeographic patterns in insular systems but focused on oceanic systems.
Cyril Hammoud   +7 more
doaj   +1 more source

Systematic composition, species diversity and plant chorology of Wadi Shuwaib: A typical desert wadi in the eastern region of United Arab Emirates (UAE) [PDF]

open access: yesBiodiversity Data Journal
The study analyses the floristic diversity, life span, life form and phytogeographic affinities of the flora of Wadi Shuwaib, a desert wadi in the eastern region of the United Arab Emirates.
Sabitha Sakkir   +4 more
doaj   +3 more sources

A late origin of the extant eukaryotic diversity: divergence time estimates using rare genomic changes

open access: yesBiology Direct, 2011
Background Accurate estimation of the divergence time of the extant eukaryotes is a fundamentally important but extremely difficult problem owing primarily to gross violations of the molecular clock at long evolutionary distances and the lack of ...
Koonin Eugene V   +4 more
doaj   +1 more source

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