Results 11 to 20 of about 336 (118)

Phylogenetic analysis of fossil flowers using an angiosperm-wide data set: proof-of-concept and challenges ahead. [PDF]

Am J Bot, 2020
Premise Significant paleobotanical discoveries in recent decades have considerably improved our understanding of the early evolution of angiosperms and their flowers. However, our ability to test the systematic placement of fossil flowers on the basis of phylogenetic analyses has remained limited, mainly due to the lack of an adequate, angiosperm‐wide ...
Schönenberger J, von Balthazar M, López Martínez A, Albert B, Prieu C, Magallón S, Sauquet H.   +6 more
europepmc   +2 more sources

First evidence of ranunculids in Early Cretaceous tropics. [PDF]

Sci Rep, 2022
Early Cretaceous floras containing angiosperms were described from several geographic areas, nearly from the Arctic to the Antarctic, and are crucial to understand their evolution and radiation.
Gobo WV, Kunzmann L, Iannuzzi R, Bachelier JB, Coiffard C.   +4 more
europepmc   +3 more sources

The genome of the king protea, Protea cynaroides. [PDF]

Plant J, 2023
SUMMARY The king protea (Protea cynaroides), an early‐diverging eudicot, is the most iconic species from the Megadiverse Cape Floristic Region, and the national flower of South Africa. Perhaps best known for its iconic flower head, Protea is a key genus for the South African horticulture industry and cut‐flower market.
Chang J, Duong TA, Schoeman C, Ma X, Roodt D, Barker N, Li Z, Van de Peer Y, Mizrachi E.   +8 more
europepmc   +2 more sources

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

Plant 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

Is There a Key Primer for Amplification of Core Land Plant DNA Barcode Regions (rbcL and matK)? [PDF]

Ecol Evol
We use in silico PCR to select and measure the amplification capability of primer. We tested 366 and 489 published primers for the rbcL and matK regions, respectively, using sequences from 8463 different land plant species. Our results indicate a set of primers that effectively cover all land plant sequences, particularly for the rbcL region.
Corvalán LCJ, de Melo-Ximenes AA, Carvalho LR, E Silva-Neto CM, Diniz-Filho JAF, Telles MPC, Nunes R.   +6 more
europepmc   +2 more sources

Angiosperm flowers reached their highest morphological diversity early in their evolutionary history. [PDF]

New Phytol
Summary Flowers are the complex and highly diverse reproductive structures of angiosperms. Because of their role in sexual reproduction, the evolution of flowers is tightly linked to angiosperm speciation and diversification. Accordingly, the quantification of floral morphological diversity (disparity) among angiosperm subgroups and through time may ...
López-Martínez AM, Magallón S, von Balthazar M, Schönenberger J, Sauquet H, Chartier M.   +5 more
europepmc   +2 more sources

Presence of Inulin-Type Fructo-Oligosaccharides and Shift from Raffinose Family Oligosaccharide to Fructan Metabolism in Leaves of Boxtree (Buxus sempervirens). [PDF]

Front Plant Sci, 2016
from raffinose family oligosaccharide to fructan metabolism in leaves of boxtree (Buxus sempervirens) Wim Van den Ende1,* Marlies Coopman1, Rudy Vergauwen1, André Van Laere11 KU Leuven, Laboratory of Molecular Plant Biology, Institute of Botany and ...
Van den Ende W, Coopman M, Vergauwen R, Van Laere A.   +3 more
europepmc   +3 more sources

Hydrogen isotope fractionation in carbohydrates of leaves and xylem tissues follows distinct phylogenetic patterns: a common garden experiment with 73 tree and shrub species

New Phytologist, Volume 239, Issue 2, Page 547-561, July 2023., 2023
Summary Recent methodological advancements in determining the nonexchangeable hydrogen isotopic composition (δ2Hne) of plant carbohydrates make it possible to disentangle the drivers of hydrogen isotope (2H) fractionation processes in plants. Here, we investigated the influence of phylogeny on the δ2Hne of twig xylem cellulose and xylem water, as well ...
Philipp Schuler, Valentina Vitali, Matthias Saurer, Arthur Gessler, Nina Buchmann, Marco M. Lehmann   +5 more
wiley   +1 more source

The best of two worlds: ecology and evolution of ambophilous plants

Biological Reviews, Volume 98, Issue 2, Page 391-420, April 2023., 2023
ABSTRACT Ambophily, the mixed mode of wind and insect pollination is still poorly understood, even though it has been known to science for over 130 years. While its presence has been repeatedly inferred, experimental data remain regrettably rare. No specific suite of morphological or ecological characteristics has yet been identified for ambophilous ...
Stefan Abrahamczyk, Jan‐Hendrik Struck, Maximilian Weigend   +2 more
wiley   +1 more source

Evolution and patterning of the ovule in seed plants

Biological Reviews, Volume 96, Issue 3, Page 943-960, June 2021., 2021
ABSTRACT The ovule and its developmental successor, the seed, together represent a highly characteristic feature of seed plants that has strongly enhanced the reproductive and dispersal potential of this diverse group of taxa. Ovules encompass multiple tissues that perform various roles within a highly constrained space, requiring a complex cascade of ...
Paula J. Rudall
wiley   +1 more source