Biología
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Trichopilia x ramonensis (Orchidaceae), un híbrido natural de Costa Rica
(2002)Se describe e ilustra el híbrido natural Trichopilia x ramonensis (T. marginata x T. suavis) de la región de San Ramón, Costa Rica. El nombre de este híbrido se usó por primera vez en 1992; sin embargo, hasta ahora no ... -
Reposo y germinación de semillas de Enterolobium cyclocarpum (Fabaceae): resultados de un estudio inédito y un experimento fallido
(2003)En Costa Rica, se determinó que para reproducir la especie arbórea Enterolobium cyclocarpum (Fabaceae), las semillas seleccionadas deben tener una masa de 0,7 a 1,0 g. En general, mayor masa del fruto implica mayor masa ... -
The influence of temperature and pH on bacterial community composition of microbial mats in hot springs from Costa Rica
(2019)We used the 16S rRNA gene pyrosequencing approach to investigate the microbial diversity and community composition in several Costa Rican hot springs alongside the latitudinal axis of the country, with a range of temperatures ... -
Inventario florístico en varias áreas boscosas en Tabarcia de Mora y Palmichal de Acosta, Costa Rica
(1993)Se realizó un inventario florístico en la cuenca de los ríos Tabarcia y Negro, San José, con el fin de estimular la creación de un sistema de pequeñas reservas forestales privadas. Se identificaron más de 180 especies ... -
Distribución del psílido asiático de los cítricos (Diaphorina citri Kuwayama) en Costa Rica
(2007-08)El insecto plaga Diaphorina citri es vector de la enfermedad de los cítricos conocida como “Huanglongbing”. Esta enfermedad, causada por una bacteria limitada al floema, llamada Candidatus Liberibacter, es de gran importancia ... -
Ant–Aphid Relations in Costa Rica, Central America (Hymenoptera: Formicidae; Hemiptera: Aphididae)
(2012)We present the first catalogue of ant-aphid associations (Hymenoptera: Formicidae / Hemiptera: Aphididae) of Costa Rica. 29 species of ants and 18 species of aphids establish 48 relationships. Those interactions seem not ... -
C1 compounds shape the microbial community of an abandoned century-old oil exploration well
(2020)The search for microorganisms that degrade hydrocarbons is highly relevant because it enables the bioremediation of these substances cheaply and without dangerous by-products. In this work, we studied the microbial communities ... -
Temperature and elemental sulfur shape microbial communities in two extremely acidic aquatic volcanic environments
(2021)Aquatic environments of volcanic origin provide an exceptional opportunity to study the adaptations of microbial communities to early planet life conditions such as high temperatures, high metal concentrations, and low pH. ... -
Bryophyte and lichen biomass and nitrogen fixation in a high elevation cloud forest in Cerro de La Muerte, Costa Rica
(2021-01)Cloud forests have been found to lose more nitrogen in stream discharge than they gain from atmospheric deposition. They also support a large diversity and biomass of tree epiphytes, predominately composed of cryptogams. ... -
Redox stress reshapes carbon fluxes of Pseudomonas putida for cytosolic glucose oxidation and NADPH generation
(2020)The soil bacterium and metabolic engineering platform Pseudomonas putida tolerates high levels of endogenous and exogenous oxidative stress, yet the ultimate reason of such property remains unknown. To shed light on this ... -
Phylogenetic analysis of ITS data from endophytic fungi using massive parallel bayesian tree inference with exabayes
(2020-03-27)Ecological studies of fungal communities have been favored thanks to the emergence and improvement of independent culture techniques that use the ITS region as a molecular marker. This has allowed a more accurate identification ... -
Step‐by‐Step Pipeline for the Ecological Analysis of Endophytic Fungi using ITS nrDNA Data
(2020-01-07)The nuclear ribosomal DNA internal transcribed spacer (ITS) is accepted as the genetic marker or barcode of choice for the identification of fungal samples. Here, we present a protocol to analyze fungal ITS data, from ... -
Mycelial inhibition of Trichoderma spp. (Hypocreaceae) isolated from the cultivation of Pleurotus ostreatus (Pleurotaceae) with an extract of Pycnoporus sp. (Polyporaceae)
(2020-01-07)Background and Aims: The production of edible fungi is affected by bacterial, fungal and viral diseases, which very often cause large losses. In the production of mushrooms of the genus Pleurotus, the fungi of Trichoderma ... -
Visualizing the invisible: class excursions to ignite children’s enthusiasm for microbes
(2020)We have recently argued that, because microbes have pervasive – often vital – influences on our lives, and that therefore their roles must be taken into account in many of the decisions we face, society must become ... -
Life cycle and in vitro sporulation dynamics of Corinectria constricta, the causal agent of Pinus radiata stem canker, in Chile
(2020-04-07)In 2008, a canker disease caused by the fungus Corinectria constricta was detected in southern Chile. The causal agent was previously identified as Neonectria fuckeliana (now Corinectria fuckeliana), which has been associated ... -
First evidence for an aposematic function of a very common color pattern in small insects
(2021-02-11)Many small parasitoid wasps have a black head, an orange mesosoma and a black metasoma (BOB color pattern), which is usually present in both sexes. A likely function of this widespread pattern is aposematic (warning) ... -
Helicobacter pylori Colonization Drives Urokinase Receptor (uPAR) Expression in Murine Gastric Epithelium During Early Pathogenesis
(2020)(1) Background: Persistent Helicobacter pylori infection is the most important risk factor for gastric cancer. The urokinase receptor (uPAR) is upregulated in lesions harboring cancer invasion and inflammation. Circumstantial ... -
Estacionalidad, recursos florales y cambios a largo plazo de la comunidad de abejas euglosinas del bosque tropical seco de Costa Rica
(2021)La potencial desaparición global de las abejas y su impacto en la economía y los ecosistemas naturales han atraído la atención de científicos, gobiernos y público en general. Sin embargo, aún faltan datos para respaldar ... -
Caracterización de tipos virales causantes de la bronquitis infecciosa aviar (IBV) en granjas de pequeños y medianos productores avícolas en Costa Rica
(2024)La bronquitis infecciosa (IB) es una enfermedad muy contagiosa del tracto respiratorio de las aves. Puede afectar también el tejido entérico y reproductivo, por lo que ha acarreado problemas económicos, al disminuir el ... -
Iridiscencia foliar
(2020)La iridiscencia en plantas es un fenómeno óptico producido por la interacción entre la luz y la estructura de las células, lo que origina un color estructural (no intervienen pigmentos). La luz que incide en las hojas puede ...
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