Results 31 to 40 of about 1,443 (185)

Spermatophyta Molecular Clock: Time Drift and Recent Acceleration. [PDF]

open access: yesPlant Environ Interact
Exponential increase in the base substitution rate in recent geologic time. ABSTRACT Angiospermae radiation is widely recognized as a mid‐Cretaceous event, but the adaptive radiation of Asarum and Viola as spring ephemerals also occurred during the Quaternary. To better understand the evolution of Angiospermae through geological time, a robust and well‐
Osozawa S.
europepmc   +2 more sources

The evolutionary fate of rpl32 and rps16 losses in the Euphorbia schimperi (Euphorbiaceae) plastome

open access: yesScientific Reports, 2021
Gene transfers from mitochondria and plastids to the nucleus are an important process in the evolution of the eukaryotic cell. Plastid (pt) gene losses have been documented in multiple angiosperm lineages and are often associated with functional ...
Aldanah A. Alqahtani, Robert K. Jansen
doaj   +1 more source

Non-dispersive phloem-protein bodies (NPBs) of Populus trichocarpa consist of a SEOR protein and do not respond to cell wounding and Ca2+ [PDF]

open access: yesPeerJ, 2018
Differentiating sieve elements in the phloem of angiosperms produce abundant phloem-specific proteins before their protein synthesis machinery is degraded.
Daniel L. Mullendore   +6 more
doaj   +2 more sources

Structure and development of flowers and inflorescences in Peraceae and Euphorbiaceae and the evolution of pseudanthia in Malpighiales. [PDF]

open access: yesPLoS ONE, 2018
Pseudanthia are reduced and compact inflorescences which apparently had independent evolution in Euphorbiaceae and Peraceae within Malpighiales. In order to analyze the hypothesis that the different pseudanthia found in Malpighiales have non-homologous ...
Karina Bertechine Gagliardi   +2 more
doaj   +1 more source

Synopsis of Acalypha L. (Euphorbiaceae) of Peru and Bolivia, with description of a new species

open access: yesAnales del Jardín Botánico de Madrid, 2013
A critical review of the Peruvian and Bolivian species of Acalypha L. (Euphorbiaceae) is presented. As a result 41 species (42 taxa) are accepted, 31 from Peru and 28 from Bolivia, and 94 names are considered synonyms.
José María Cardiel   +2 more
doaj   +1 more source

The Loss of the Inverted Repeat in the Putranjivoid Clade of Malpighiales [PDF]

open access: yesFrontiers in Plant Science, 2020
The typical plastid genome (plastome) of photosynthetic angiosperms comprises a pair of Inverted Repeat regions (IRs), which separate a Large Single Copy region (LSC) from a Small Single Copy region (SSC). The independent losses of IRs have been documented in only a few distinct plant lineages.
Dong-Min Jin   +7 more
openaire   +3 more sources

Development, structure, and secretion of leaf colleters in Clusia criuva Cambess. subsp. criuva (Clusiaceae)

open access: yesActa Botânica Brasílica, 2022
Colleters produce a secretion composed of hydrophilic and/or lipophilic substances which lubricates and protects the shoot apical meristem against biotic and abiotic agents. Little attention has been given to these structures in Clusiaceae.
Roberta Silva Teixeira   +3 more
doaj   +1 more source

Malpighiaceae from Lenheiro Mountain Range, Minas Gerais, Brazil

open access: yesRodriguésia, 2021
We present a taxonomic treatment for Malpighiaceae from the Lenheiro Mountain Range, São João del-Rei, Minas Gerais, Brazil, where a total of 23 species and nine genera were recorded.
Livia Lara Alves   +3 more
doaj   +1 more source

Not a shrinking violet: Pollen morphology of Violaceae (Malpighiales) [PDF]

open access: yesGrana, 2012
Abstract Pollen morphology of Violaceae, a family of c. 825–900 species, has been little studied to date, with the exception of Viola. In this paper, we present the results of a survey of the pollen of representative species of 16 of the 23 genera of Violaceae, examined using light microscopy, scanning electron microscopy and selectively transmission ...
Peter J. L. Mark   +2 more
openaire   +1 more source

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