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Listar por autor "Beltrán Martínez, Roberto"

Mostrando ítems 1-12 de 12

Agronomic treatments to avoid presence of seeds in Nadorcott mandarin II. Effect on seed number per fruit and yield

Garmendia, Alfonso; Raigón Jiménez, Mª Dolores; García-Breijo, Francisco-José; Reig, José; Beltrán, Roberto; Zornoza, Carlos; Cebrián, Nuria; Merle Farinós, Hugo Basilio (Public Library of Science, 2022-12-09)

[EN] Nadorcott is a well-established and appreciated mandarin by the fresh market. However, it produces seeds due to cross-pollination with other compatible varieties, which is quite frequent in most producing countries. ...
Effect of dsRNA on growth rate and reproductive potential of Monosporascus cannonballus

Armengol Fortí, Josep; Alaniz, Sandra; Vicent, Antonio; Beltrán, Roberto; Abad Campos, Paloma; Pérez Sierra, Ana María; García Jiménez, José; Ben Salem, Ibtissem; Souli, Mounira; Boughalleb, Naima (Elsevier, 2011-03)

The effect of double stranded RNA (dsRNA) infection on growth rate and the reproductive potential of Monosporascus cannonballus was studied in 21 isolates collected in cucurbit growing areas of Spain and Tunisia. The ...
Effect of freezing conservation time on loquat (Eriobotrya japonica) pollen germination

Beltrán, Roberto; Cebrián, Nuria; Zornoza, Carlos; Garmendia, Alfonso; Merle Farinós, Hugo Basilio (Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria, 2020)

[EN] Aim of study: Several studies point out that storage at -20 ºC is a suitable method for preserving pollen of many species in the long term. Part of those studies indicate the total storage time at which these conditions ...
Effect of sulfur on pollen germination of Clemenules mandarin and Nova tangelo

Beltrán, Roberto; Cebrian, Nuria; Zornoza, Carlos; García-Breijo, Francisco-José; Reig Armiñana, José; Garmendia, Alfonso; Merle Farinós, Hugo Basilio (PeerJ, 2023-02-07)

[EN] This study aims to elucidate whether sulfur can inhibit citrus pollination by affecting pollen grains. For this, four sulfur-based products (inorganic sulfur, water dispersible granular sulfur, ammonium sulfate, copper ...
Effect of temperature on pollen germination for several Rosaceae species: influence of freezing conservation time on germination patterns

Beltrán, Roberto; Valls, Aina; Cebrián, Nuria; Zornoza, Carlos; García-Breijo, Francisco-José; Reig Armiñana, José; Garmendia, Alfonso; Merle Farinós, Hugo Basilio (PeerJ, 2019-12-11)

[EN] Between February 2018 and April 2018, flowers were collected from eight Rosaceae species. Flowers were kept in a freezer at -20 degrees C for three freezing times (Treatment 1, two months; Treatment 2, four months; ...
Estudio detallado de la floración y el cuajado de los cítricos a través de seguimiento fotográfico

Mahiques Guerola, Federico (Universitat Politècnica de València, 2020-12-28)

[ES] La floración es, probablemente, uno de los procesos más determinantes de la cosecha final. Influye tanto sobre la cantidad como sobre la calidad de la cosecha. Existen numerosos problemas ligados a la recolección de ...
Estudios epidemiológicos y de patogenicidad de Monosporascus cannonballus Pollack et Uecker

Beltrán Martínez, Roberto (Universitat Politècnica de València, 2008-05-06)

El ascomiceto Monosporascus cannonballus Pollack et Uecker es uno de los principales hongos asociados al síndrome del "colapso", que afecta al cultivo de cucurbitáceas en España y otros países. Las ascosporas son el inóculo ...
Forced Flowering in Mandarin Trees Under Phytotron Conditions

Garmendia, Alfonso; Beltrán, Roberto; Zornoza, Carlos; García-Breijo, Francisco-José; Reig, José; Raigón Jiménez, Mª Dolores; Merle Farinós, Hugo Basilio (Journal of Visualized Experiments, 2019-03-06)

[EN] Phytotron has been widely used to assess the effect of numerous parameters on the development of many species. However, less information is available on how to achieve fast profuse flowering in young fruit trees with ...
Gibberellic acid in Citrus spp. flowering and fruiting: A systematic review

Garmendia, Alfonso; Beltrán, Roberto; Zornoza, Carlos; García-Breijo, Francisco-José; Reig, José; Merle Farinós, Hugo Basilio (Public Library of Science, 2019-09-26)

[EN] Background In Citrus spp., gibberellic acid (GA) has been proposed to improve different processes related to crop cycle and yield. Accordingly, many studies have been published about how GA affects flowering and ...
In Vivo Pollen Tube Growth and Evidence of Self-Pollination and Prefloral Anthesis in cv. Macabeo (Vitis vinifera L.)

García-Breijo, Francisco-José; Reig Armiñana, José; Garmendia, Alfonso; Cebrián, Nuria; Beltrán, Roberto; Merle Farinós, Hugo Basilio (MDPI AG, 2020-12)

[EN] Cultivar Macabeo is one of the most planted white grape varieties of northern Spain. A general agreement supports many Vitis vinifera cultivars possibly being self-fertile, although this seems to be a variety-dependent ...
Insect repellent and chemical agronomic treatments to reduce seed number in Afourer mandarin. Effect on yield and fruit diameter

Garmendia, Alfonso; BELTRÁN MARTÍNEZ, ROBERTO; Zornoza Gallego, Carlos; García-Breijo, Francisco-José; REIG ARMIÑANA, JOSÉ; Bayona, Irene; Merle Farinós, Hugo Basilio (Elsevier, 2019-02-27)

[EN] Obtaining citrus fruits without seeds is a recurrent objective for farmers as it is one of the most valued characteristics, especially in mandarins. "Afourer" tangor is a highly valuable well-established mandarin, and ...
Ultrastructural Evidence Elucidates the Mode of Action of Sulfur in Preventing Pollen Tube Development in Stigma of Citrus cv. Nadorcott and Other Horticultural Species

García-Breijo, Francisco-José; Reig, José; Cebrián, Nuria; Garmendia, Alfonso; Beltrán, Roberto; Zornoza, Carlos; Merle Farinós, Hugo Basilio (MDPI, 2023-06)

[EN] Citrus species have a "wet"-type stigma with abundant exudate, and their style contains numerous canals. For successful seed formation, the process includes pollen grain germination on the stigma, pollen tube development ...