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American Potato Journal

, Volume 69, Issue 2, pp 131–142 | Cite as

Effect of three anti-gibberellin growth retardants on tuberization of induced and non-induced Katahdin potato leaf-bud cuttings

  • Alan R. Langille
  • P. R. Hepler
Article

Abstract

Katahdin potato plants were grown in a growth chamber undernoninducing conditions and treated with three anti-gibberellin growth retardants. Other plants were sprayed with gibberellic acid and placed in aninducing growth chamber adjusted to promote tuber induction. Treatments were repeated the following week. After final treatment, apical, sub-apical, medial and basal leaf-bud cuttings were taken from each plant and placed in a mist chamber. After two weeks, cuttings were examined for tuberization. Two of the retardants were associated with approximately 3 and 2 fold increases in tuberization over the non-induced control. Although induced control cuttings exhibited almost complete tuberization, application of gibberellic acid to plants grown under identical conditions, reduced tuberization 14 fold. Tuberization response of induced control cuttings was unaffected by stem location. In non-induced control and quaternary ammonium compound-treated cuttings, basal cuttings tuberized significantly better than those taken from higher on the stem. This pattern was eliminated for plants treated with the triazole compound. Below-ground portions of donor plants were also examined and showed a significant increase in average rhizome number and total rhizome length associated with inducing conditions. Tuber number of donor plants was also increased for those plants grown under inducing conditions or treated with the triazole compound under noninducing conditions.

Additional Key Words

BAS-106 BAS-111 CCC GA3 gibberellin inhibitors Solanum tuberosum 

Compendio

Se cultivaron plantas de papa Katahdin en una cámara de crecimiento bajo condiciones no inducidas y tratadas con tres giberilinas retardadoras del crecimiento. Otras plantas fueron asperjadas con ácido giberélico y colocadas en una cámara de crecimiento inducido regulada para promover la inducción de tubérculos. Los tratamientos se repitieron a la siguiente semana. Despueés del tratamiento final, se tomaron de cada planta esquejes de hoja-yema apicales, subapicales, medios y basales y se les colocó en una cámara nebulizadora. Después de dos semanas, se examinó la tuberización de los esquejes. Dos de los retardadores estuvieron asociados con incrementos en la tuberización que fueron aproximadamente el triple o el doble que los del control no inducio. No obstante que los esquejes del control inducido mostraron una tuberización casi completa, la aplicación de ácido giberélico a las plantas mantenidas bajo condiciones idénticas redujo la tuberización 14 veces. La respuesta en la tuberización de los esquejes del control inducido no fue afectada por la ubicación del tallo. En los esquejes del control no inducido y de aquellos tratados con compuesto de amonio cuaternario, los esquejes basales tuberizaron significativamente mejor que aquellos tornados a mayor altura del tallo. Esta situación quedó eliminada en las plantas tratadas con el compuesto triazole. Las partes, de las plantas madres, bajo el nivel del suelo fueron tamién examinadas y mostraron un incremento significativo, asociado con las condiciones de inducción, en el número promedio de rizomas y en la longitud total del rizoma. El número de tubérculos de las plantas madres también se incrementó para aquellas tratadas con el compuesto triazole bajo condiciones de no inducción.

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Copyright information

© Springer 1992

Authors and Affiliations

  • Alan R. Langille
    • 1
  • P. R. Hepler
    • 1
  1. 1.Department of Plant, Soil, and Environmental SciencesUniversity of MaineOrono

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