Efecto de dos citocininas y un inhibidor del crecimiento en la tuberización in vitro de dos genotipos de Solanum tuberosum L. vars. Atlantic y Alpha

Autores/as

DOI:

https://doi.org/10.15359/ru.33-2.1

Palabras clave:

microtuberización, papa, Solanum tuberosum L., reguladores de crecimiento

Resumen

La presente investigación se llevó a cabo con el objetivo de evaluar el efecto de dos citocininas 6-benzilaminopurina (BAP) (6.5 mg l-1) y kinetina (K) (2.5 mg l-1), más un inhibidor de crecimiento ácido abscísico (ABA) (1.0 mg l-1) sobre la capacidad de tuberización in vitro de dos variedades de papa, Atlantic y Alfa. El medio de cultivo usado como testigo fue el básico MS (1962) sin reguladores del crecimiento. Los resultados obtenidos evidenciaron una respuesta diferente entre variedades. En la variedad Atlantic, el análisis de los datos en relación con las variables número (NM), peso (PM) y diámetro (DM) de microtubérculos indicó que la adición de reguladores de crecimiento no afectó favorablemente la inducción y el desarrollo de microtubérculos, con respecto al testigo. Al utilizar BAP, se notó un incremento no significativo de 41 % en el número promedio de microtubérculos en comparación con el tratamiento control, pasando de 2.6 a 4.4. La adición de citocininas y ABA al medio no provocó efectos positivos en el desarrollo de los microtubérculos. En la variedad Alfa, la utilización de citocininas en ausencia de ABA estimuló el NM y estos fueron más pesados y de mayor diámetro que en el tratamiento testigo. En esta variedad, el ABA causó un efecto negativo en el NM, así como en las variables PM y DM. Probablemente la acción exógena de las citocininas en los medios de cultivo ocasionó un desbalance hormonal endógeno en los genotipos Atlantic y Alfa, que interfirió sobre la capacidad innata de microtuberización, resultado que se evidenció en mayor magnitud para la variedad Alfa, lo cual reveló la necesidad de continuar optimizando los protocolos genotipo-específicos de los sistemas de cultivo de tejidos en papa para aumentar el rendimiento y la calidad de la semilla.

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Publicado

2019-07-31

Cómo citar

Efecto de dos citocininas y un inhibidor del crecimiento en la tuberización in vitro de dos genotipos de Solanum tuberosum L. vars. Atlantic y Alpha. (2019). Uniciencia, 33(2), 1-12. https://doi.org/10.15359/ru.33-2.1

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Artículos científicos originales (arbitrados por pares académicos)

Cómo citar

Efecto de dos citocininas y un inhibidor del crecimiento en la tuberización in vitro de dos genotipos de Solanum tuberosum L. vars. Atlantic y Alpha. (2019). Uniciencia, 33(2), 1-12. https://doi.org/10.15359/ru.33-2.1

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