Results 41 to 50 of about 16,393 (262)

The evolution of tree nursery offerings in Los Angeles County over the last 110 years [PDF]

open access: yes, 2013
Interest in urban vegetation has increased dramatically. Urban trees are an important aspect of the urban environment but there is little known about the potential sources of those trees, change in tree species diversity over time and the factors leading
Gillespie, TW   +4 more
core   +1 more source

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   +1 more source

Evidence for an ancient whole genome duplication in the cycad lineage [PDF]

open access: yes, 2017
Contrary to the many whole genome duplication events recorded for angiosperms (flowering plants), whole genome duplications in gymnosperms (non-flowering seed plants) seem to be much rarer.
Lohaus, Rolf   +5 more
core   +3 more sources

Passive phloem loading and long-distance transport in a synthetic tree-on-a-chip [PDF]

open access: yes, 2017
Vascular plants rely on differences of osmotic pressure to export sugars from regions of synthesis (mature leaves) to sugar sinks (roots, fruits). In this process, known as M\"unch pressure flow, the loading of sugars from photosynthetic cells to the ...
A Lang   +36 more
core   +2 more sources

Pliocene taxodiaceous fossil wood from southwestern Ukraine and its palaeoenvironmental implications

open access: yesJournal of Palaeogeography, 2013
Mineralized wood collected from Late Pliocene strata near Gorbki village in the Transcarpathian region of Beregovo Kholmogor'e in southwestern Ukraine was anatomically studied and identified.
Yi Tiemei   +2 more
doaj   +1 more source

Elemental Profiles in Cycas micronesica Stems

open access: yesPlants, 2018
Essential nutrients and metals have been quantified in stems of many tree species to understand the role of stems as storage and source organs. Little is known about stored stem resources of cycad tree species. Cycas micronesica tissue was collected from
Thomas E. Marler
doaj   +1 more source

The dynamic history of gymnosperm plastomes: Insights from structural characterization, comparative analysis, phylogenomics, and time divergence

open access: yesThe Plant Genome, 2021
Gymnosperms are among the most endangered groups of plant species; they include ginkgo, pines (Conifers I), cupressophytes (Conifers II), cycads, and gnetophytes. The relationships among the five extant gymnosperm groups remain equivocal. We analyzed 167
Lubna   +7 more
doaj   +1 more source

The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin) [PDF]

open access: yes, 2019
Microfacies and high resolution studies at the Kurovice quarry (Czech Republic, Outer Western Carpathians) on calpionellids, calcareous and non-calcareous dinoflagellate cysts, sporomorphs and calcareous nannofossils, aligned with paleomagnetism, allow ...
Elbra, Tiiu   +6 more
core   +1 more source

Full-length transcriptomic identification of R2R3-MYB family genes related to secondary cell wall development in Cunninghamia lanceolata (Chinese fir)

open access: yesBMC Plant Biology, 2021
Background R2R3-MYB is a class of transcription factor crucial in regulating secondary cell wall development during wood formation. The regulation of wood formation in gymnosperm has been understudied due to its large genome size.
Hebi Zhuang   +6 more
doaj   +1 more source

Temporal introduction patterns of invasive alien plant species to Australia [PDF]

open access: yes, 2012
We examined temporal introduction patterns of 132 invasive alien plant species (IAPS) to Australia since European colonisation in 1770. Introductions of IAPS were high during 1810–1820 (10 species), 1840– 1880 (51 species, 38 of these between 1840 and ...
Murray, Brad R., Phillips, Megan L.
core   +2 more sources

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