Results 51 to 60 of about 2,327 (226)
La determinación del sexo en Cícadas (Cycadales) [PDF]
Cuadernos de biodiversidad, 2012 Plants are organisms that offer unique reproductive systems to study sex determination, in other words, the expression of masculinity or femininity. Within the plant kingdom, the separation of sex has emerged over the evolutionary history in more than one hundred occasions.
Iglesias Andreu, Lourdes Georgina +4 more
openaire +2 more sources
Characterization of the complete chloroplast genome of endangered Cycads Zamia fischeri Miq. ex Lem
Mitochondrial DNA. Part B. Resources, 2018 The whole chloroplast (cp) genome sequence of Zamia fischeri has been characterized. The cp genome length was 164,767 bp in length, with a GC content of 39.7%, containing a large single copy (LSC) of 90,226 bp, a small single copy (SSC) of 23,223 bp, and
Jin-Yan Lei +2 more
doaj +1 more source
Botanical Sciences, 1974 Se dan a conocer los resultados del estudio de cutículas fósiles del Cretácico inferior de Argentina mediante el uso del microscopio electrónico de barrido.
Sergio Archangelsky
doaj +1 more source
Cícadas, fósiles vivientes del reino vegetal [PDF]
, 2017 Fil: Martínez, Leandro Carlos Alcides. Instituto de Botánica Darwinion; ArgentinaFil: Artabe, Analía Emilia Eva. Universidad Nacional de La Plata.
Artabe, Analía Emilia Eva +1 more
core +2 more sources
Missouri Botanical Garden's cycad collection: A journey through time
Plant Species Biology, Volume 40, Issue 6, Page 607-624, November 2025.This article summarizes the history of the Missouri Botanical Garden's extensive cycad collection. Some of the specimens currently housed in the living collections date back well over 100 years. Cycads continue to face a myriad of threats in the wild, and their conservation in ex situ collections is of critical importance to assist in their survival ...
Benjamin E. Deloso +3 more
wiley +1 more source
Botanical Sciences, 2012 Dioon merolae (Zamiaceae) es una especie arborescente, longeva, con tallos curvados e inclinados, posiblemente por fototropismo, que crece en laderas de montículos abruptos con suelos arenosos delgados.
Mario González-Espinosa +2 more
doaj +1 more source
Plant Species Biology, Volume 40, Issue 6, Page 530-546, November 2025.Recent research has ignited a renewed interest in Ceratozamia cycads, unveiling their remarkable diversity. While previous studies primarily focused on morphology, this investigation employs a multidisciplinary approach, integrating phylogenetics, morphology, and ecological niches. Our methods identify seven distinct lineages as separate species.
Anwar Medina‐Villarreal +2 more
wiley +1 more source
Journal of Palaeogeography, 2019 The coal horizons of the Middle Jurassic Hojedk Formation of East-Central Iran are fossiliferous, bearing numerous well-preserved fossil plants, comparable to the Shemshak Group/Formation in the Alborz Mountains in Northern Iran.
Mohammad Taghi Badihagh, Dieter Uhl
doaj +1 more source
Plant Species Biology, Volume 40, Issue 6, Page 527-529, November 2025.Often regarded as “living fossils,” cycads are well known for retaining many ancestral traits, which makes them particularly fascinating to naturalists and scientists alike. Cycads provide insights into the functional and developmental processes underlying the origin and diversification of seed plants, and they may help clarify how they colonized the ...
José Said Gutiérrez‐Ortega
wiley +1 more source
Perspectives on Endosymbiosis in Coralloid Roots: Association of Cycads and Cyanobacteria
Frontiers in Microbiology, 2019 Past endosymbiotic events allowed photosynthetic organisms to flourish and evolve in terrestrial areas. The precursor of chloroplasts was an ancient photosynthetic cyanobacterium.
Aimee Caye G. Chang +5 more
doaj +1 more source