Results 41 to 50 of about 487 (171)

Progress in the study of dioecy in Mexican cycad species and its implications for conservation

Plant Species Biology, Volume 40, Issue 6, Page 556-571, November 2025.
Cycads are endangered dioecious plants of great ornamental value that have a long period of sexual maturity. Therefore, it is crucial to have methods for early sex determination that can help to develop effective strategies for their conservation. Abstract Dioecy is a system of sexual reproduction in plants, characterized by the spatial separation of ...
Lourdes Georgina Iglesias Andreu, María Ydelia Sánchez‐Tinoco, Miguel Angel Perez‐Farrera   +2 more
wiley   +1 more source

Preface of Special Feature “Current topics on cycad biology: Deciphering the Rosetta Stone of plant evolution.” Part II: Perspectives from natural history

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

Perspectivas sistemáticas de Zamia (Zamiaceae) en Megaméxico: de la taxonomía alfa a los códigos de barras genéticos Systematic perspectives on Zamia (Zamiaceae) in Megamexico: from alpha taxonomy to genetic barcodes

Revista Mexicana de Biodiversidad, 2011
El género Zamia en Megaméxico cuenta con 22 especies descritas y una entidad en el estatus de species dubium (Z. verschaffeltii). En las últimas décadas, el género Zamia ha recibido atención en tratamientos florísticos regionales, y de manera ...
Fernando Nicolalde-Morejón, Jorge González-Astorga, Francisco Vergara-Silva, Andrew P. Vovides   +3 more
doaj  

Best in the company of nearby males: female success in the threatened cycad, Zamia portoricensis [PDF]

PeerJ, 2018
Variation in plant reproductive success is affected by ecological conditions including the proximity of potential mates. We address the hypothesis that spatial distribution of sexes affects female reproductive success (RS) in the dioecious cycad, Zamia ...
Julio C. Lazcano-Lara, James D. Ackerman
doaj   +2 more sources

Synergistic Effects on the Mechanical, Thermal, and Morphological Properties of HDPE Composites Reinforced With Walnut Shell and Nano‐Calcium Carbonate

Journal of Applied Polymer Science, Volume 142, Issue 37, October 5 2025.
This study explores the mechanical properties of HDPE‐based composites reinforced with walnut shell (WS) and Nano‐CaCO3. The addition of Nano‐CaCO3 enhanced tensile and flexural strength, demonstrating its reinforcing effect. These findings highlight the potential of HDPE/WS/Nano‐CaCO3 composites for structural applications, offering insights into ...
İdris Karagöz, Halil İbrahim Duyar, Aysu Çavuşoğlu, Harun Sepetcioglu   +3 more
wiley   +1 more source

Estudio de una población de Zamia skinnerii en una finca de Baja Talamanca, Costa Rica

Tecnología en Marcha, 2019
Se estudia una población de Zamia skinnerii en un Bosque Tropical Húmedo transición a Bosque muy Húmedo Tropical, Baja Talamanca, Limón Costa Rica. Se construyeron 34 parcelas de las que se muestrearon 17 al azar.
Braulio Vílchez
doaj   +2 more sources

Las gimnospermas de los bosques mesófilos de montaña de la Huasteca Hidalguense, México

Botan‪ical Sciences, 2001
Se realizó un tratamiento florístico de las gimnospermas que habitan los bosques mesófilos de montaña de la Huasteca Hidalguense; se registran en este tipo de vegetación cinco familias, que incluyen seis géneros y diez especies.
Raúl Contreras-Medina, Isolda Luna-Vega, Othón Alcántara-Ayala   +2 more
doaj   +1 more source

Most young leaves pale in comparison to mature leaves: delayed greening is neither binary nor tropical

Ecography, Volume 2025, Issue 9, September 2025.
Delayed greening, the phenomenon in which expanding leaves appear red, blue or pale green due to low chlorophyll content, has long intrigued ecologists. However, little is known about what type of species are most likely to delay greening or which environmental conditions are associated with delayed greening.
Giancarlo M. Chiarenza, Angela T. Moles
wiley   +1 more source

Population genetics of Zamia decumbens (Zamiaceae, Cycadales), an endangered cycad from the Maya Mountains of Belize

Plant Species Biology, Volume 40, Issue 4, Page 324-340, July 2025.
We utilized 10 microsatellite loci to examine the genetic diversity, genetic structure, and demographic history of Zamia decumbens Calonje, Meerman, M.P. Griff. & Hoese, an endangered cycad species occurring in small disjunct populations on karst topography within the Maya Mountains of Belize.
Michael Calonje, Alan W. Meerow, Jan Meerman, Javier Francisco‐Ortega, M. Patrick Griffith   +4 more
wiley   +1 more source

Distribución, ciclo biológico y tabla de vida de Eumaeus toxea (Lepidoptera:Lycaenidae) en la provincia fisiográfica Costa de Oaxaca, México

Revista Mexicana de Biodiversidad, 2015
La mariposa Eumaeus toxea es un herbívoro que se alimenta de Zamia paucijuga, una cícada considerada amenazada y vulnerable, con unatendencia a la disminución y desaparición de sus poblaciones.
Noe Ruiz-García, Brenda Yesenia Méndez-Pérez, Mario Valerio Velasco-García, Guillermo Sánchez-de la Vega, Juana Laura Rivera-Nava   +4 more
doaj   +1 more source