Caracterización de dormancia y estrategias para promover germinación en especies del género Schizanthus

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dc.catalogadorgjm
dc.contributor.advisorContreras E., Samuel
dc.contributor.authorMoreno Osorio, Joaquín Alberto
dc.contributor.otherPontificia Universidad Católica de Chile. Facultad de Agronomía y Sistemas Naturales
dc.date.accessioned2024-03-11T14:17:31Z
dc.date.available2024-03-11T14:17:31Z
dc.date.issued2023
dc.date.updated2024-03-10T22:09:10Z
dc.descriptionTesis (Magister en Fisiología y Producción Vegetal)--Pontificia Universidad Católica de Chile, 2023.
dc.description.abstractThe genus Schizanthus (Solanaceae) includes 14 annual and biennial species, mostly endemic to Chile, commonly known as “maripositas”. This genus exhibits a variety of colorful flowers, giving it great ornamental potential for cultivation. However, the seeds of this genus show low germination rates, indicating a possible dormancy that hinders their commercial production. The objective of this study was to determine the dormancy mechanisms and implement strategies for efficient seed propagation in Schizanthus porrigens, S. carlomunozii, and S. hookeri. Morpho-anatomical analysis indicated the presence of a thin seed coat, oily endosperm, and a curved embryo for all three species. Imbibition with gibberellic acid (GA3, 200 ppm) proved to be the most effective treatment in promoting germination, both in laboratory and nursery conditions. Imbibition in potassium nitrate (KNO3 at 0.3%) increased germination only in S. hookeri and, to a lesser extent, in S. porrigens. The seeds of S. hookeri show an increased response to GA3 as the storage time increases; however, they do not germinate in the absence of GA3. Seeds treated for 24 hours in solutions of GA3, KNO3, and distilled water showed similar seedling heights at transplanting. Nevertheless, soaking the seeds for 48 hours in GA3 resulted in more etiolated seedlings. The seeds of the three studied Schizanthus species exhibit an intermediate physiological dormancy that can be broken by GA3 without negatively affecting their quality at the time of transplanting under nursery conditions.
dc.fechaingreso.objetodigital2024-03-11
dc.format.extent47 páginas
dc.fuente.origenAutoarchivo
dc.identifier.doi10.7764/tesisUC/AGR/84325
dc.identifier.urihttps://doi.org/10.7764/tesisUC/AGR/84325
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/84325
dc.information.autorucFacultad de Agronomía e Ingenieria Forestal; Contreras E., Samuel; S/I; 8151
dc.information.autorucFacultad de Agronomía e Ingenieria Forestal; Moreno Osorio, Joaquín Alberto; S/I; 1066610
dc.language.isoes
dc.nota.accesoContenido completo
dc.rightsacceso abierto
dc.subjectPhysiological dormancy
dc.subjectGiberelic acid
dc.subjectAfter-ripening
dc.subjectOrnamental crop
dc.subject.ddc600
dc.subject.deweyTecnologíaes_ES
dc.titleCaracterización de dormancia y estrategias para promover germinación en especies del género Schizanthus
dc.title.alternativeCharacterization of dormancy and strategies to promote germination in species of the genus Schizanthus
dc.typetesis de maestría
sipa.codpersvinculados8151
sipa.codpersvinculados1066610
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