Results 31 to 40 of about 512 (134)

Heat drastically alters floral color and pigment composition without affecting flower conspicuousness

American Journal of Botany, Volume 113, Issue 1, January 2026.
Abstract Premise Floral pigments primarily serve to attract pollinators through color display and also contribute to protection against environmental stress. Although pigment composition can be plastically altered under stress, its impact on pollinator color perception remains poorly understood.
Eduardo Narbona, Francisco Perfectti, Adela González‐Megías, Luis Navarro, José C. del Valle, Cristina Armas, José M. Gómez   +6 more
wiley   +1 more source

Tomato flowering depends on overlapping functions of AP1/FUL‐like genes in reproductive meristem specification

New Phytologist, Volume 248, Issue 2, Page 1002-1020, October 2025.
Summary AP1/FUL‐clade transcription factors (TFs) are essential for the initiation and regulation of flowering and have clearly separated functions in Arabidopsis. However, how these functions have diverged across eudicots remains unclear. Here, we performed a detailed analysis to unravel the distinct and overlapping functions of the tomato AP1 ...
Xiaobing Jiang, Iris E. Zahn, Kai Thoris, Chris Roelofsen, Edelin Roque, Concepción Gómez‐Mena, Cristina Ferrándiz, Hongru Wang, Gerco C. Angenent, Marian Bemer   +9 more
wiley   +1 more source

Thresholds for spring freeze: measuring risk to improve predictions in a warming world

New Phytologist, Volume 248, Issue 2, Page 563-575, October 2025.
Summary Plant distribution and productivity are shaped by environmental stressors, particularly freezing events in extra‐tropical regions. In early spring, a progressive loss of cold hardiness with phenological development leaves emerging tissues vulnerable to freezing events.
Erica Kirchhof, Francisco Campos‐Arguedas, Nadia Soledad Arias, Al P. Kovaleski   +3 more
wiley   +1 more source

Biología reproductiva de la uchuva

Acta Agronómica, 2008
Los objetivos del trabajo fueron determinar la época de maduración del polen y del estigma y establecer el tipo de polinización de la uchuva en condiciones de invernadero con cinco genotipos de uchuva.
Tulio César Lagos B., Franco Alirio Vallejo Cabrera, Hernando Criollo Escobar, Jaime Eduardo Muñoz Flórez   +3 more
doaj  

New records, range extensions and updated distribution of two gymnophthalmid lizards from the Caribbean Region, Colombia [PDF]

Check List, 2015
In Colombia, detailed knowledge of the geographic distribution of gymnophthalmid lizards is scarce. This paper presents the first confirmed records of Leposoma rugiceps and provides additional records of Gymnophthalmus speciosus from Department of La ...
Fabio Meza-Joya, Eliana Ramos-Pallares
doaj   +3 more sources

Ants on flowers: Protective ants impose a low but variable cost to pollination, moderated by location of extrafloral nectaries and type of flower visitor

Journal of Ecology, Volume 113, Issue 8, Page 2187-2198, August 2025.
Individuals who engage in multiple mutualisms often have to pay indirect costs because of the interference of one mutualism on another. We found that protective ants had a low but variable impact on pollination, especially on the flower visitation by bees and when EFNs are close to inflorescences.
Amanda Vieira da Silva, Anselmo Nogueira, Judith L. Bronstein, Pedro J. Rey, Laura Carolina Leal   +4 more
wiley   +1 more source

Testicular Morphohistology of Hypsiboas pulchellus (Amphibia, Hylidae) During the Breeding Season

Acta Biológica Colombiana, 2015
In this study, data concerning to the morphological testicular features of Hypsiboas pulchel-lus during the breeding season is provided, in order to know aspects of their reproductive biology.
Fernando José CAREZZANO, Karina DORFLINGER, Matías ALONSO, Sergio Pablo URQUIZA BARDONE   +3 more
doaj   +1 more source

Spatiotemporal Dynamics of Non‐Ecological Speciation in Rubyspot Damselflies (Hetaerina spp.)

Molecular Ecology, Volume 34, Issue 12, June 2025.
ABSTRACT Non‐ecological speciation is a common mode of speciation, which occurs when allopatric lineages diverge in the absence of pronounced ecological differences. Yet, relative to other speciation mechanisms, non‐ecological speciation remains understudied.
C. Patterson, A. Brennan, H. Cowling, A. González‐Rodríguez, G. F. Grether, L. Mendoza Cuenca, M. Springer, Y. M. Vega‐Sánchez, J. Drury   +8 more
wiley   +1 more source

Cómo y cuándo el levonorgestrel previene el embarazo si se administra como anticonceptivo de emergencia

ARS Medica, 2008
En esta revisión se actualiza el mecanismo de acción del levonorgestrel (LNG) usado en anticoncepción de emergencia. El análisis crítico de la estimación de la eficacia anticonceptiva del LNG indica que su tasa de falla es más alta que la publicada.
Horacio Croxatto Avoni, María Elena Ortiz Scarlazetta   +1 more
doaj   +1 more source

Sex‐Specific Variation in Foraging Behavior is Related to Telomere Length in a Long‐Lived Seabird

Ecology and Evolution, Volume 14, Issue 12, December 2024.
Foraging during breeding is energetically demanding, intimately linked to breeding investment, and possibly constrained by individual condition. Telomere length, the protective nucleoproteins located at the ends of the chromosomes, is considered a trait reflecting somatic maintenance and individual quality. We found that brown booby females with longer
Mauricio Guillen‐Parra, Rocio Barcenas‐Flores, Alberto Velando, Anne Wiley, Bibiana Montoya, Roxana Torres   +5 more
wiley   +1 more source