Efecto de distintos niveles de intensidad lumínica sobre la respuesta morfofisiológica y la concentración de metabolitos secundarios en Plantago lanceo/ata L.
Loading...
Date
2024
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad de Concepción
Abstract
La incorporación de Plantago lanceolata L. en praderas ha aumentado debido a su mayor tolerancia al estrés hídrico y producción de materia seca en comparación con Lolium perenne L. Plantago reduce los gases de efecto invernadero al disminuir el nitrógeno (N) en la orina de los rumiantes, gracias a metabolitos como aucubina, catalpol y acteósido, cuya concentración varían con la luz. Sin embargo, hay escasa información sobre el efecto de la intensidad lumínica en variedades forrajeras. Esta investigación evaluó la respuesta productiva, química y morfofisiológica de plantago en función de tres niveles de intensidad lumínica (200, 300 y 400 µmol m-2 s-1), utilizando un diseño completamente al azar. Las variables morfofisiologías se midieron semanalmente, las productivas cada tres semanas, y las químicas al final del estudio. Aunque la intensidad lumínica afectó las variables fisiológicas, no tuvo impacto en las variables productivas, morfológicas ni químicas. Se observó diferencia en algunos parámetros de fluorescencia en el tratamiento de menor intensidad, pero en todos los tratamientos se mantuvieron dentro del rango óptimo, indicando que las plantas no sufrieron daño oxidativo. En conclusión, plantago demostró capacidad para regular la actividad fotosintética sin afectar su crecimiento ni composición química.
The incorporation of Plantago lanceolata L. in pastures has increased due to its greater tolerance to water stress and dry matter production compared to Lolium perenne L. Plantago reduces greenhouse gases by reducing nitrogen (N) in ruminant urine, thanks to metabolites such as aucubin, catalpol and acteoside, whose concentration varies with light. However, there is little information on the effect of light intensity on forage varieties. This research evaluated the productive, chemical and morpho-physiological response of plantago as a function of three levels of light intensity (200, 300 and 400 µmol m-2 s-1), using a split-plot design with replicates homogeneously distributed in them. Morphophysiological variables were measured weekly, productive variables every three weeks, and chemical variables at the end of the study. Although light intensity affected physiological variables, it had no impact on productive, morphological or chemical variables. Differences were observed in some fluorescence parameters in the lower intensity treatment, but in all treatments they remained within the optimal range, indicating that the plants did not suffer oxidative damage. In conclusion, plantago demonstrated the ability to regulate photosynthetic activity without affecting growth or chemical composition.
The incorporation of Plantago lanceolata L. in pastures has increased due to its greater tolerance to water stress and dry matter production compared to Lolium perenne L. Plantago reduces greenhouse gases by reducing nitrogen (N) in ruminant urine, thanks to metabolites such as aucubin, catalpol and acteoside, whose concentration varies with light. However, there is little information on the effect of light intensity on forage varieties. This research evaluated the productive, chemical and morpho-physiological response of plantago as a function of three levels of light intensity (200, 300 and 400 µmol m-2 s-1), using a split-plot design with replicates homogeneously distributed in them. Morphophysiological variables were measured weekly, productive variables every three weeks, and chemical variables at the end of the study. Although light intensity affected physiological variables, it had no impact on productive, morphological or chemical variables. Differences were observed in some fluorescence parameters in the lower intensity treatment, but in all treatments they remained within the optimal range, indicating that the plants did not suffer oxidative damage. In conclusion, plantago demonstrated the ability to regulate photosynthetic activity without affecting growth or chemical composition.
Description
Tesis presentada para optar al título de Ingeniero/a Agrónomo/a.
Keywords
Fluorescencia, Plantas Efecto de la luz, Fotosíntesis, Forraje