Results 41 to 50 of about 1,298 (173)

Cycads from the Triassic of Antarctica: Permineralized Cycad Leaves [PDF]

International Journal of Plant Sciences, 2007
Permineralized cycad petioles and/or rachides with associated pinnae are described from two Triassic localities in the Queen Alexandria Range, central Transantarctic Mountains, Antarctica. Petiole‐rachides display an inverted‐omega‐shaped arrangement of vascular bundles typical of most genera of extant Cycadales and exarch primary xylem that link them ...
Hermsen, Elizabeth, Taylor, Thomas N., Taylor, Edith L., Stevenson, Dennis W.   +3 more
openaire   +2 more sources

Revisiting the nomenclature of Carludovica microcephala, type species of Dicranopygium (Cyclanthaceae)

TAXON, Volume 75, Issue 4, August 2026.
Abstract The name Carludovica microcephala, basionym of the type species of Dicranopygium (Cyclanthaceae), has long been attributed to J.D. Hooker (1892), based on plants cultivated at the Royal Botanic Gardens, Kew. A reassessment of nineteenth‐century horticultural literature shows that the name had already been validly published 35 years earlier, in
Eduardo S. Leal, Catalina M. Álvarez‐Correa, Dino Tuberquia, Daniela C. Zappi   +3 more
wiley   +1 more source

Stem Carbon Dioxide Efflux of Lignophytes Exceeds That of Cycads and Arborescent Monocots

Agronomy, 2022
Tree stem CO2 efflux (Es) can be substantial and the factors controlling ecosystem-level Es are required to fully understand the carbon cycle and construct models that predict atmospheric CO2 dynamics.
Thomas E. Marler
doaj   +1 more source

Conserved symbiosis‐associated genes in the cycad Encephalartos natalensis suggest co‐option for cyanobacterial symbiosis

New Phytologist, Volume 251, Issue 4, Page 2168-2185, August 2026.
The heterocyst‐rich Encephalartos natalensis cyanobacterial zone in coralloid root suggests co‐option of conserved symbiosis‐associated genes. This figure was created in BioRender (BioRender.com/https://BioRender.com/n3qveqc). Summary Plant‐cyanobacterial symbioses have evolved independently at least four times across land plants, yet their underlying ...
Cassandra Schoeman, Danielle Roodt, Amy Mc Menamin, Oliver Bezuidt, Choaro Dithugoe, Desré Pinard, Eshchar Mizrachi   +6 more
wiley   +1 more source

Ecological niches and biogeography of nitrogen‐fixing plants in Europe

Plant Biology, Volume 28, Issue 5, Page 1349-1360, August 2026.
Despite sharing N fixation as a common trait, European legume and actinorhizal plant lineages occupy strikingly divergent ecological niches shaped by their evolutionary histories and physiological adaptations. Advanced symbiont control allows IRLC legumes to expand into northern, mesic regions, while non‐IRLC legumes are more common in Mediterranean ...
N. Fahs, I. Axmanová, J.‐C. Svenning, T. Těšitelová, J. Padullés Cubino, I. Biurrun, J. A. Campos, J. Dengler, E. Garbolino, J. Těšitel   +9 more
wiley   +1 more source

Using Nuclear Genomic Data to Address Intractable Relationships and Gene Tree Discordance in an Ancient Group of Gymnosperms (Ephedra, Gnetales)

Ecology and Evolution, Volume 16, Issue 7, July 2026.
Low‐copy nuclear genes were used to address the notoriously difficult phylogeny of Ephedra. Additionally, we explored the potential effect of putative paralogy, intra‐locus recombination, and chimeric sequences on phylogenetic estimation. ABSTRACT The evolutionary history of Ephedra L.
Ruben Blokzijl, Catarina Rydin
wiley   +1 more source

Discovery of Cyanobacteria Associated with Cycads and Description of Three Novel Species in Desmonostoc (Nostocaceae)

Diversity, 2023
Heterocyte-forming cyanobacteria form symbiotic relationships with several lineages of plants. Here, twenty (20) strains of endosymbiotic cyanobacteria (cyanobionts) with Nostoc-like morphologies were isolated from the highly specialized coralloid roots ...
Melissa H. Pecundo, Tao Chen, Thomas Edison E. dela Cruz, M. Patrick Griffith, Zhangli Hu, Huirong Chen, Nan Li   +6 more
doaj   +1 more source

Segetal plants of agricultural landscapes of the Southern Non‐Chernozem zone as a source of biological resources

Юг России: экология, развитие
Aim. To identify economically significant species of segetal plants of agrophytocenoses in the Southern Non‐Chernozem zone and assess their dynamics with changes in anthropogenic load.The study was carried out by analysing geobotanical descriptions of ...
A. N. Nikolskii, V. D. Bochkarev, D. V. Bochkarev, K. O. Drozdova   +3 more
doaj   +1 more source

Pollinator diversity and host specificity in threatened Encephalartos cycads and their implications for co‐extinction and species recovery

Functional Ecology, Volume 40, Issue 6, Page 1862-1877, June 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract The highly threatened African cycad genus Encephalartos faces severe threats such as habitat loss and poaching. In addition, the lack of sexual recruitment due to the absence of pollinators (pollinator collapse) has emerged as another major threat.
Paul D. Janse van Rensburg, Terence N. Suinyuy, John S. Donaldson   +2 more
wiley   +1 more source

Differences in characteristics between naturalized threatened plants and other threatened plants

Conservation Biology, Volume 40, Issue 3, June 2026.
Abstract Many non‐native plant species introduced by humans have become naturalized. At the same time many species are threatened in their native range. However, the number of plant species threatened in their native range that are naturalized elsewhere remains unknown.
Weihan Zhao, Trevor S. Fristoe, Amy J. S. Davis, Wayne Dawson, Franz Essl, Holger Kreft, Jan Pergl, Petr Pyšek, Patrick Weigelt, Marten Winter, Mark van Kleunen   +10 more
wiley   +1 more source