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dc.creatorZerpa Catanho, Dessireé Patricia
dc.creatorHernández Pridybailo, Andrés
dc.creatorMadrigal Ortiz, Viviana
dc.creatorZúñiga Centeno, Adonay
dc.creatorPorras Martínez, Carolina
dc.creatorJiménez García, Víctor
dc.creatorBarboza Barquero, Luis Orlando
dc.date.accessioned2019-07-09T16:49:36Z
dc.date.available2019-07-09T16:49:36Z
dc.date.issued2019
dc.identifier.issn1542-7528
dc.identifier.issn1542-7536
dc.identifier.urihttp://hdl.handle.net/10669/78032
dc.description.abstractTo breed and preserve pitaya (Hylocereus spp.) genetic resources, reliable information on seed storage and germination conditions is needed. Therefore, this study was undertaken to evaluate the effects of the following factors on germination of pitaya seeds: seed extraction method (manual vs. enzymatic seed extraction), storage time and conditions (up to 12 months at room temperature and in a cold storage chamber), germination conditions [temperature (15, 20, 25 and 30ºC) and light (blue, red and darkness)], germination assessment method (conventional vs. automated with digital image analysis), harvesting season (2014 and 2015), and water potential (−0.5, −1.0 and −2.0 MPa induced by polyethylene glycol 6000 or NaCl). Results showed that freshly extracted seeds germinated close to 100% within one week. Enzymatic seed extraction increased germination speed. Room temperature-stored seeds lost viability compared to cold-stored seeds, whose germination did not change across 12 months of storage. When seeds were germinated at 15°C and in darkness, germination rate and speed decreased. Conventional and image analysis approaches showed a high coefficient of determination when measuring seed germination and allowed to calculate additional parameters, such as maximum germination (gMAX) and time to achieve 50% germination (T50). Water potential of −0.5 MPa negatively affected seed vigor but not gMAX; germination was inhibited below −1.0 MPa. Hylocereus seeds were more affected by polyethylene glycol 6000 than by NaCl at the same water potential.es_ES
dc.language.isoen_USes_ES
dc.relation.ispartof
dc.subjectCactaceaees_ES
dc.subjectdigital imaginges_ES
dc.subjectlightes_ES
dc.subjectosmotic stresses_ES
dc.subjectseed vigores_ES
dc.subjecttemperaturees_ES
dc.titleSeed germination of pitaya (Hylocereus spp.) as affected by seed extraction method, storage, germination conditions, germination assessment approach and water potentiales_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.typeArtículo científicoes_ES
dc.date.updated2019-07-08T13:59:09Z
dc.identifier.doi10.1080/15427528.2019.1604457
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Agroalimentarias::Centro para Investigaciones en Granos y Semillas (CIGRAS)es_ES
dc.identifier.codproyecto734-A5-029
dc.identifier.codproyecto734-B4-229


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