Results 51 to 60 of about 60,020,712 (173)

Descifrando las bases moleculares de la resistencia cuantitativa

Acta Biológica Colombiana, 2011
Uno de los factores mas importantes que afectan los cultivos son las enfermedades ocasionadas por los patógenos. La resistencia vegetal ha sido clásicamente dividida en dos tipos: i) competa, vertical o cualitativa que es gobernada por un solo gen y ii ...
Camilo Lopez
doaj  

GNPS Untargeted GC‐MS Metabolomic Analysis of Essential Oils From Duguetia lanceolata and Evaluation of Antimicrobial Activity

Chemistry &Biodiversity, Volume 23, Issue 2, February 2026.
Untargeted metabolomic analysis of the essential oil of D. lanceolata leaves collected in winter revealed that they are mostly composed of sesquiterpenes, while those collected in autumn showed a predominance of monoterpenes. Both essential oils displayed antimicrobial activity against bacterial and fungal species.
Jackson Monteiro, Geovanna N. Antonelli, Erick P. Dantas, Simone S. Grecco, Marisi G. Soares, João Henrique G. Lago, Renata C. Pascon, Marcelo A. Vallim, Patricia Sartorelli   +8 more
wiley   +1 more source

Estrategias de mejora para resistencia a jopo de girasol: Nuevas fuentes de resistencia y marcadores para genes de resistencia y avirulencia

, 2021
Sunflower broomrape (Orobanche cumana Wallr.) is a holoparasitic plant that causes significat yield losses to sunflower crops. While there are many studies associated with genetic resistance to broomrape in sunflower, the molecular tools that are ...
Calderón González, Álvaro
core   +1 more source

Structured Promoter Variability in Epigenetically Regulated Operons Contributes to Surface Adaptation in Salmonella

Microbial Biotechnology, Volume 19, Issue 2, February 2026.
We discovered that Salmonella uses structured, recurrent variation in epigenetically regulated promoter regions to fine‐tune gene expression, revealing a novel evolutionary strategy for surface adaptation. ABSTRACT Bacterial adaptation to dynamic and hostile environments often relies on the ability to modify surface structures, which are subjected to ...
Rocío Fernández‐Fernández, Gabriel Gutiérrez, Francine Piubeli, Junkal Garmendia, Carmen R. Beuzón, María Antonia Sánchez‐Romero   +5 more
wiley   +1 more source

Evaluación de la expresión diferencial de genes de materiales contrastantes de la colección colombiana de solanum phureja por su resistencia a spongospora subterránea [PDF]

, 2012
El cultivo de papa es uno de los principales cultivos a nivel mundial. No obstante se ve seriamente afectado por diferentes patógenos, dentro de los cuales uno de los que ha venido cobrando gran importancia es el plasmodiophorido Spongospora subterranea ...
Rodriguez Fuerte, Verónica Lucia
core  

Effects of landscape fragmentation on floodplain fishes as revealed by species–habitat networks

Conservation Biology, Volume 40, Issue 1, February 2026.
Abstract How species interact with habitat patches is influenced primarily by habitat configuration (e.g., connectivity) and species’ functional traits. As levels of fragmentation increase, identifying the intricate connections between these components is crucial for biodiversity conservation.
Chen Zhang, Jorge García‐Girón, Ziyu Yang, Ziyu Liu, Shuxin Li, Wenhui You, Yihao Ge, Xin Gao, Yunzhi Yan   +8 more
wiley   +1 more source

Generación natural de resistencia y transferencia de genes de resistencia a los antibióticos en bacterias bajo distintas condiciones ambientales

La resistencia a los antibióticos es una amenaza creciente para la salud pública a nivel mundial. En este proyecto, se evaluó la generación de resistencia natural a Imipenem, un antibiótico de amplio espectro, en Salmonella sp.
Cruz Chávez, Johenis del Carmen de la
core   +2 more sources

Evolution of research on global amphibian declines

Conservation Biology, Volume 40, Issue 1, February 2026.
Abstract In the late 1980s, the scientific community became aware of severe, enigmatic amphibian population declines. These declines triggered a wave of research focused on quantifying their extent and identifying key drivers. We used text‐analysis techniques, including topic modeling and geoparsing, to examine the evolution of research focused on ...
Jordann Crawford‐Ash, Maldwyn John Evans, Tamilie Carvalho, Jodi J. L. Rowley, Trenton W. J. Garner, Erin Muths, Ben C. Scheele   +6 more
wiley   +1 more source

Genetic Diversity of Polymyxin Resistance Genes in Klebsiella pneumoniae Clinical Isolates

Molecular Ecology, Volume 35, Issue 2, January 2026.
ABSTRACT This study investigates the genetic diversity and evolutionary mechanisms driving polymyxin resistance in Klebsiella pneumoniae, a critical priority pathogen. By analysing mgrB, phoPQ and pmrAB genes in susceptible (PM‐S) and resistant (PM‐R) populations through neutrality tests (Tajima D, Fu & Li's D) we uncovered polygenic adaptation and ...
Daniel Miceli Serwy, Maria Eduarda Rocha Conde, Ana Luiza Carneiro Alencar, Roberto Leonan Morim Novaes, Josué da Costa Lima‐Junior, Fabio Faria da Mota, Ana Paula Carvalho‐Assef, Teca Calcagno Galvao, Viviane Zahner   +8 more
wiley   +1 more source

Identificación de genes involucrados en la transformación y resistencia a arsénico en microorganismos recuperados de zonas de Colombia con la presencia del metal [PDF]

, 2012
Se identificaron genes involucrados en la transformación y resistencia a arsénico en bacterias cultivables recuperadas de aguas y suelos provenientes de zonas de Colombia con presencia de arsénico.
Carrillo Castro, Katerine
core