Efecto del manitol y sorbitol en la conservación in vitro de Solanum tuberosum L.
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Rev. Inv. Cs. Agro. y Vet.
Abstract
La conservación in vitro supera limitaciones de métodos convencionales, ofreciendo plantas libres de patógenos con mayor uniformidad genética. El propósito de la presente investigación fue evaluar el efecto de diferentes concentraciones de manitol y sorbitol en el desarrollo de los microtubérculos producidos a partir de explantes in vitro de Solanum tuberosum L., con el fin de optimizar las condiciones para su conservación. Se diseñó un experimento completamente aleatorizado con arreglo factorial, que incluyó tres niveles de concentración, 0%, 2% y 4%, de ambos agentes osmóticos. Los hallazgos indican que concentraciones bajas, 2%, de manitol y sorbitol favorecieron un crecimiento moderado de los explantes como osmoprotectores. Sin embargo, al 4% se observó una disminución significativa en el desarrollo por estrés osmótico excesivo. La interacción entre ambos agentes a altas concentraciones tuvo un efecto sinérgico negativo en el crecimiento. Este estudio resalta la importancia de optimizar manitol y sorbitol en cultivos in vitro para ralentizar el crecimiento sin toxicidad y conservar el germoplasma.
In vitro conservation overcomes limitations of conventional methods, offering pathogen-free plants with greater genetic uniformity. The purpose of the present research was to evaluate the effect of different concentrations of mannitol and sorbitol on the development of microtubers produced from in vitro explants of Solanum tuberosum L., in order to optimize the conditions for their conservation. A completely randomized experiment with a factorial arrangement was designed, which included three concentration levels, 0%, 2% and 4%, of both osmotic agents. The findings indicate that low concentrations, 2%, of mannitol and sorbitol favored moderate growth of the explants as osmoprotectants. However, at 4% a significant decrease in development was observed due to excessive osmotic stress. The interaction between both agents at high concentrations had a negative synergistic effect on growth. This study highlights the importance of optimizing mannitol and sorbitol in in vitro cultures to slow growth without toxicity and conserve germplasm.
In vitro conservation overcomes limitations of conventional methods, offering pathogen-free plants with greater genetic uniformity. The purpose of the present research was to evaluate the effect of different concentrations of mannitol and sorbitol on the development of microtubers produced from in vitro explants of Solanum tuberosum L., in order to optimize the conditions for their conservation. A completely randomized experiment with a factorial arrangement was designed, which included three concentration levels, 0%, 2% and 4%, of both osmotic agents. The findings indicate that low concentrations, 2%, of mannitol and sorbitol favored moderate growth of the explants as osmoprotectants. However, at 4% a significant decrease in development was observed due to excessive osmotic stress. The interaction between both agents at high concentrations had a negative synergistic effect on growth. This study highlights the importance of optimizing mannitol and sorbitol in in vitro cultures to slow growth without toxicity and conserve germplasm.
Description
Vol. 9, No. 25