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Newly Discovered Natural Hosts of Tomato chlorosis virus in Costa Rica
(2011-04)
Tomato chlorosis virus (ToCV) is an emerging whitefly-transmitted crinivirus. In Costa Rica in 2007, ToCV was detected in field-grown and greenhouse tomato (Solanum lycopersicum L.) plants causing symptoms of severe yellowing ...
Effect of Gamma Irradiation and Selection with Fungus Filtrate (Rhizoctonia solani Kuhn) on the in Vitro Culture of Common Bean (Phaseolus vulgaris)
(2015)
The present investigation was undertaken to study the effect of gamma irradiation (dose from 10 to 100 Gy) and in vitro selection with fungus filtrate as selecting agent (concentration from 20% to 100%) on the susceptibility ...
Comparative Analysis of Three Different Total Nucleic Acid Extraction Protocols for the Diagnosis of Geminiviruses in Squash (Cucurbita moschata)
(2012)
Squash (Cucurbita moschata) is one of the most important crops in tropical countries. Geminiviruses are an important group of plant pathogens. In 2002 a new begomovirus was reported to naturally infect squash and some other ...
Ultrastructure and histology of organogenesis induced from shoot tips of maize (Zea mays, Poaceae)
(Revista de Biología Tropical; vol.57(supl.1), 2009-11)
Shoot tips of maize (Zea mays L.) were cultured on Murashige and Skoog medium supplemented with 2 mg/l BA +1 mg/l 2,4-D +40 mg/l, to investigate phases of ontogenetic development. The study used light microscopy as well ...
Un método de transformación genética de maíz para conferirle resistencia ulterior a enfermedades virales
A method for genetic transformation of maize for resistance to viral diseases
(2004-09)
A method for genetic transformation of maize for resistance to viral diseases. A system for the genetic transformation of maize was developed for two Costa Rican varieties: CR-7 and Diamantes 8843, that can allow the ...
Establecimiento de cultivos celulares morfogénicos para el mejoramiento genético del frijol (Phaseolus vulgaris L.).
(2011-08-08)
La investigación desarrolló la metodología y los protocolos experimentales para la regeneración de plantas de cultivo in vitro, a partir de tejidos somáticos en varios genotipos de frijol común (Phaseolus vulgaris L.) de ...
Bemisia tabaci Biotype Q is present in Costa Rica
(2011)
Whiteflies are an insect group that comprises multiple species and biotypes, capable of affecting crops by phloem feeding, virus transmission and promotion of fungal colonization. The distribution of these pests is worldwide. ...
Establecimiento de cultivos celulares para la regeneración in vitro del ayote (Cucúrbita moschata)
(2012-04-09)
Desarrollar la metodología y los protocolos experimentales para la regeneración de plantas en condiciones de cultivo in vitro, a partir de tejidos somáticos en varios genotipos de Ayote (cucúrbita moshata) de Costa Rica, ...
First Report of Tomato chlorosis virus Infecting Sweet Pepper in Costa Rica
(2011-11)
In September 2008, a survey of whiteflies and whitefly-borne viruses was performed in 11 pepper-growing greenhouses in the province of Cartago, Costa Rica. During this survey, the vast majority of sweet pepper (Capsicum ...
Analysis of genetic diversity of Cucurbita moschata (D.) germplasm accessions from Mesoamerica revealed by PCR SSCP and chloroplast sequence data
(2012-02)
The aim of this research was the genetic characterization of 218 accessions of Cucurbita moschata Duchesne, a squash, and its relationship with morphological characteristics of agronomic interest, which are part of the ...