Browsing Agronomía by Title
Now showing items 253-272 of 400
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Genetic Diversification and Dispersal of Taro (Colocasia esculenta (L.) Schott)
(2016-06-17)Taro (Colocasia esculenta (L.) Schott) is widely distributed in tropical and sub-tropical areas. However, its origin, diversification and dispersal remain unclear. While taro genetic diversity has been documented at the ... -
Genetic Diversity of Xylella fastidiosa Strains from Costa Rica, São Paulo, Brazil, and United States
(2007-10)The diversity of 42 Xylella fastidiosa strains from Costa Rica, São Paulo, Brazil, and the United States were analyzed using the sequence of the 16S rRNA gene by variable number of tandem repeat (VNTR) fragment analysis ... -
Genipa americana and Ageratina anisochroma, two new hosts of Candidatus Phytoplasma asteris in Costa Rica
(2018-08-23)We report two new plant species hosts for Candidatus Phytoplasma asteris: Genipa americana (Rubiaceae) and Ageratina anisochroma (Asteraceae). Phytoplasma infections were detected by real-time loop-mediated isothermal ... -
Genome wide association mapping for the tolerance to the polyamine oxidase inhibitor guazatine in arabidopsis thaliana
(2016)Guazatine is a potent inhibitor of polyamine oxidase (PAO) activity. In agriculture, guazatine is used as non-systemic contact fungicide efficient in the protection of cereals and citrus fruits against disease. The composition ... -
Guazuma ulmifolia (Sterculiaceae), a new natural host of 16SrXV phytoplasma in Costa Rica
(2011-04)Guacimo trees (Guazuma ulmifolia, Sterculiaceae) showing witches’ broom symptoms (GWB), small leaves, short internodes, stunting and no flower and fruit production were observed on side roads and fences in different areas ... -
Hallazgos ultraestructurales en lesiones foliares asociadas a ‘vena roja’ en helecho hoja de cuero*
(2014-02)La vena roja del helecho hoja de cuero (Rumorah adiantiformis) se cataloga como una enfermedad de etiología desconocida, ya que no se conoce cuál es su agente o factor causal. Ésta alteración, al igual que el síndrome de ... -
Hidroponía en Guanacaste: una experiencia en el territorio indígena de Matambú
(2014-11)El objetivo de esta investigación fue evaluar el desempeño de la producción de hortalizas en hidroponía en el Territorio Indígena de Matambú, utilizando diferentes sustratos, con el fin de identificar su eficacia como ... -
Histological observations on maize leaf tissues infected with rayado fino virus
(1977-03)Observaciones realizadas al microscopio electrónico mostraron que las células del parénquima de hojas de maíz infectadas con el virus del rayado fino (VRF) aparecían ligeramente contraídas en relación a las de hojas sanas. ... -
Hormonal status of maize initial explants and of the embryogenic and non-embryogenic callus cultures derived from them as related to morphogenesis in vitro
(2001)Endogenous hormone levels (indole-3-acetic acid [IAA], abscisic acid [ABA], gibberellins 1, 3 and 20 [GAs], zeatin/zeatin riboside [Z/ZR] and N6[Δ2-isopentenyl] adenine/N6[Δ2-isopentenyl] adenosine; [iP/iPA]) were analysed ... -
Identificación de especies del género Colletotrichum asociadas a la antracnosis en papaya (Carica papaya L.) en Costa Rica
(2017-07)La antracnosis, causada por Colletotrichum spp., es una de las enfermedades pos-cosecha más importantes en papaya. En este estudio, frutas de papaya, híbrido Pococí, recolectados en plantaciones ubicadas en el cantón de ... -
Identificación del virus del mosaico del maíz, un rhabdovirus, en Costa Rica
(1994)Maize mosaic virus (MMV), a rhabdovirus, was identified associated to maize field plants, showing stunting and continuous chlorotic stripes uniformely distributed over the leaf blade.The virus was detected in field samples ... -
Identificación y selección de híbridos somáticos obtenidos mediantefusión de protoplastos
(2009)El poder seleccionar eficientemente las plantas híbridas producidas a partir de fusión de protoplastos es fundamental. Se han logrado muchos avances en el tema en las últimas décadas. Entre los métodos utilizados para la ... -
Identification and distribution of melon infecting viruses and their vectors in two provinces of Costa Rica
(1993)Papaya ringspot potyvirus (PRSV), watermelon mosaic 2 potyvirus (WMV-2), cucumber mosaic cucumovirus (CMV) and zucchini yellow mosaic potyvirus (ZYMV), singly or in mixed infections, were identified by ELISA in melon ...