Abstract
Bromoethane was evaluated for its suitability to induce dormant tubers to sprout. Bromoethane immediately broke dormancy and caused multiple sprouting when applied to whole tubers as a vapor at 0.1 or 0.2 ml/L for 24 h at room temperature. Superficial and localized necrosis developed on the tubers if proper skin set had not occurred either in the field or after a curing period. In fall greenhouse trials, bromoethane treatment of whole tubers of the cultivars Red Pontiac, Russet Burbank, Bintje, Kennebec and Caribe induced them to sprout 40 to 70% earlier than untreated controls. Application of bromoethane significantly increased the mean rate of shoot elongation by 2.8 mm/day although there was no significant difference in its effect among the cultivars.
Resumen
Se evaluó el bromoetano por su capacidad para inducir brotamiento de tubérculos en dormancia. El bromoetano rompió la dormancia inmediatamente e indujo brotamiento múltiple cuando se aplicó a tubérculos enteros en forma de vapor a 0.1 ó 0.2 ml/L por 24 h. a temperatura ambiental. Se produjo necrosis superficial y localizada en los tubérculos que no habían formado piel en el campo, o bajo condiciones de almacenaje. En experimentos de invernadero durante el otoño, el tratamiento con bromoetano de tubérculos enteros de los cultivares Red Pontiac, Russet Burbank, Bintje, Kennebec y Caribe, indujo brotamiento del 40 a 70%, antes que los testigos. La aplicación de bromoetano incrementa significativamente la tasa media de alargamiento del tallo en 2.8 mm/día, aunque no hubo ninguna diferencia significativa en su afecto entre los cultivares.
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Coleman, W.K. An evaluation of bromoethane for breaking tuber dormancy inSolanum tuberosum L.. American Potato Journal 60, 161–167 (1983). https://doi.org/10.1007/BF02853997
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DOI: https://doi.org/10.1007/BF02853997