Results 21 to 30 of about 209 (128)

Analysis of the extranucleolar ribonucleoprotein particles of Cycas revoluta Thunb. (Cycadaceae) and Ceratozamia mexicana Brongn. (Zamiaceae)

open access: yesBotan‪ical Sciences, 2022
Background: Nuclear ribonucleoprotein particles play a key role in RNA processing and in the gene expression pathway. Interchromatin granules (GICs) involved in the metabolism of pre-messenger RNA (pre-mRNA) were described in Allium cepa and ...
Lourdes-Teresa Agredano-Moreno   +3 more
doaj   +1 more source

Estimating clade‐specific diversification rates and palaeodiversity dynamics from reconstructed phylogenies

open access: yesMethods in Ecology and Evolution, Volume 14, Issue 10, Page 2575-2591, October 2023., 2023
Abstract Understanding palaeodiversity dynamics through time and space is a central goal of macroevolution. Estimating palaeodiversity dynamics has been historically addressed with fossil data because it directly reflects the past variations of biodiversity.
Nathan Mazet   +3 more
wiley   +1 more source

Pollen morphology of the Megamexican cycads reveals the potential of morphometrics to identify cycad genera

open access: yesBotan‪ical Sciences, 2020
Background: Although pollen morphology has always been an important tool in plant systematics, the possibility of distinguishing between related taxa is still debated. A difficult case is the cycads, where their morphology and small size is very similar.
Andrew P. Vovides   +4 more
doaj   +1 more source

Experimental evidence that leaf litter decomposability and flammability are decoupled across gymnosperm species

open access: yesJournal of Ecology, Volume 111, Issue 4, Page 761-772, April 2023., 2023
This is the first study to comprehensively show that litter decomposability and litter bed flammability parameters are decoupled across a wide range of species. This decoupling originates from the former depending mostly on ‘size and shape spectrum’ (SSS) traits and the latter on ‘plant economics spectrum’ (PES) traits and those trait spectra being ...
Shudong Zhang   +6 more
wiley   +1 more source

A new species of Ceratozamia (Zamiaceae) from Chiapas, Mexico [PDF]

open access: yesBotanical Journal of the Linnean Society, 2001
Ceratozamia zoquorum sp. nov. from the northern mountains of Chiapas, Mexico, is described and illustrated. It has affinities with C. miqueliana Wendl. from Veracruz, but differs in leaf, male female cone and trunk morphology.
MIGUEL A. PÉREZ-FARRERA   +2 more
  +4 more sources

The RadOrgMiner pipeline: Automated genotyping of organellar loci from RADseq data

open access: yesMethods in Ecology and Evolution, Volume 13, Issue 9, Page 1962-1975, September 2022., 2022
Abstract Different versions of Restriction‐site‐Associated DNA sequencing (RADseq) have become powerful and popular tools in molecular ecology. Although RADseq datasets are generally regarded as representative of the nuclear genome, reduced representation genomic libraries may also sample the organellar (i.e.
Levente Laczkó   +2 more
wiley   +1 more source

1039 ZAMIA DECUMBENS: Cycadales, Zamiaceae

open access: yesCurtis's Botanical Magazine, Volume 39, Issue 3, Page 517-539, September 2022., 2022
Summary Zamia decumbens Calonje, Meerman, M.P.Griff. & Hoese, a threatened cycad species from Belize, is showcased and illustrated based on field observations as well as plants cultivated in the ex situ conservation living collections of Montgomery Botanical Center (MBC) in Coral Gables, Florida. This once obscure species was described in 2009, studied
Natalia Herrera‐Blitman   +6 more
wiley   +1 more source

Lords of the biosphere: Plant winners and losers in the Anthropocene

open access: yesPLANTS, PEOPLE, PLANET, Volume 4, Issue 4, Page 350-366, July 2022., 2022
The impact of humans on Earth's biodiversity varies across the Tree of Life. The extirpation and extinction of species is often determined by compatibility with human activities. Here we classify, where data are available, a significant portion (~30%) of vascular plant species as winners or losers with respect to this compatibility and show that ...
W. John Kress, Gary A. Krupnick
wiley   +1 more source

New fossil records of Ceratozamia (Zamiaceae, Cycadales) from the European Oligocene and lower Miocene

open access: yesActa Palaeobotanica, 2014
New compression leaf material of Ceratozamia (Zamiaceae) has been recognised in the European Cenozoic. A leaflet of Ceratozamia floersheimensis (Engelhardt) Kvaček was recovered among unidentified material from the Oligocene of Trbovlje, former Trifail ...
Kvaček Zlatko
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, Volume 14, Issue 3, November 2021., 2021
Abstract 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 available gymnosperm plastomes and investigated their diversity and phylogeny.
Lubna   +7 more
wiley   +1 more source

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