Cambio climático y maíz: cambios en las respuestas fisiológicas al estrés hídrico de Zea mays en presencia de bacterias promotoras de crecimiento (PGPB)

dc.contributorLasso de Paulis, Eloisa
dc.contributorBernal Giraldo, Adriana Jimena
dc.contributorECOFIV
dc.contributorLIMMA
dc.creatorRacedo Pulido, Camilo
dc.date.accessioned2023-08-04T16:43:41Z
dc.date.accessioned2023-09-07T01:07:39Z
dc.date.available2023-08-04T16:43:41Z
dc.date.available2023-09-07T01:07:39Z
dc.date.created2023-08-04T16:43:41Z
dc.date.issued2023-08-03
dc.identifierhttp://hdl.handle.net/1992/69224
dc.identifierinstname:Universidad de los Andes
dc.identifierreponame:Repositorio Institucional Séneca
dc.identifierrepourl:https://repositorio.uniandes.edu.co/
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8728116
dc.description.abstractEl cambio climático es uno de los retos actuales más importantes debido a los potenciales efectos adversos en la disponibilidad de agua y el crecimiento de cultivos y, por ende, en nuestra seguridad alimentaria. El cultivo de maíz es el tercer cultivo más importante a nivel global y se ve gravemente afectado por períodos de sequía que reducen su productividad. Para asegurar nuestro futuro alimenticio debemos explorar estrategias de cultivo que aseguren mantener la productividad aún en escenarios de sequía. En este trabajo evaluamos la capacidad de la variedad del maíz 'porva' de crecer bajo sequía al ser inoculado con una bacteria promotora de crecimiento vegetal (PGPB), de forma que se pueda determinar su comportamiento ante el estrés hídrico y si la presencia de esta bacteria logra aliviar el estrés hídrico. Se tomaron medidas fisiológicas como fluorescencia (Fv/Fm), conductancia estomática (gs) y potencial hídrico, así como mediciones de área foliar y peso seco tanto de la parte aérea como de raíz. En respuesta al tratamiento de sequía las plantas disminuyeron la eficiencia del fotosistema PSII detectado por medio de fluorescencia, disminuyeron su conductancia estomática y tuvieron valores más negativos de potencial hídrico. Sin embargo, no se detectó ningún efecto asociado a la PGPB indicando que la bacteria no alivió el estrés hídrico. Se observó que las medidas de área foliar y peso seco no fueron significativamente diferentes entre los tratamientos, indicando que 21 días de sequía no afectan el crecimiento de esta variedad de maíz. Nuestros resultados sugieren que la variedad de maíz 'porva' sería una buena variedad para ser utilizado en climas áridos o en condiciones de cambio climático. Sin embargo, es necesario realizar más ensayos para poder comprobar la efectividad de esta variedad hasta la producción del grano.
dc.languagespa
dc.publisherUniversidad de los Andes
dc.publisherBiología
dc.publisherFacultad de Ciencias
dc.publisherDepartamento de Ciencias Biológicas
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dc.rightsAtribución 4.0 Internacional
dc.rightshttp://creativecommons.org/licenses/by/4.0/
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://purl.org/coar/access_right/c_abf2
dc.titleCambio climático y maíz: cambios en las respuestas fisiológicas al estrés hídrico de Zea mays en presencia de bacterias promotoras de crecimiento (PGPB)
dc.typeTrabajo de grado - Pregrado


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