Abstract
Studies were made on the influence of growing season and low fertility on reducing sugar accumulation in storage of the stem and bud portions of Russet Burbank and Norgold Russet potatoes separated into different specific gravity groups. The stem portion of Russet Burbank had a significantly different intercept and slope of regression line (between specific gravity and reducing sugar accumulation) than the bud portions of the same tubers indicating higher reducing sugar accumulation in the stem portion as well as differences in behavior as to amount accumulated at the different specific gravity levels. No significant difference in sugar content or behavior at the different specific gravity levels was obtained between stem and bud portions of Norgold Russet. Growing season did not cause significant differences in total sugar content or slope of the regression lines within the stem or bud portions of Russet Burbank. Low fertility level resulted in significantly higher sugar accumulation in the stem portion of Russet Burbank as compared to adequate fertility and there was also a trend toward less influence of specific gravity on sugar accumulation at the lower fertility level. Low specific gravity Russet Burbank potatoes tended to be more variable in sugar accumulation from year to year and also had wider differences in sugar accumulation between stem and bud portions than high specific gravity potatoes.
Resumen
Se realizaron estudios sobre la influencia de la época de crecimiento y baja fertilidad en la acumulación de azúcares reductores durante el almacenamiento de partes basales y apicales de las papas Russet Burbank y Norgold Russet, separados en diferentes grupos de gravedad específica. La parte basai de Russet Burbank presentó una interceptión e inclinatión de la línea de regresión (entre gravedad específica y acumulación de azúcares reductores) significativamente diferente en comparación con las partes apicales de los mísmos tubérculos, indicando una acumulación más alta de azúcares reductores en la parte basai así como diferencias en el comportamiento en cuanto a la cantitad acumulada en los diferentes niveles de gravedad específica. No se obtuvo diferencia significativa en el contenido de azúcar o en el comportamiento a diferentes niveles de gravedad específica entre las partes basales y apicales de Norgold Russet. La época de crecimiento no causé diferencias significativas en el contenido de azúcares totales en la inclinatión de las líneas de regresión dentro de las partes basales y apicales de Russet Burbank. El nivel bajo de fertilidad resultó en una acumulación de azúcar significativamente más alta en la parte basai de Russet Burbank, comparado con una fertilidad adecuada y también hubo una tendencia hacia una menor influencia de la gravedad específica sobre la acumulación de azúcar en el nivel más bajo de fertilidad. Las papas Russet Burbank de baja gravedad expecífica tendieron a ser más variables de año en año en la acumulación de azúcar y también tuvieron diferencias más grandes en la acumulación de azúcar entre las partes basales y apicales que con papas con alta gravedad específica.
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Additional information
Scientific paper no. 4475. College of Agriculture Research Center, Washington State University, Pullman, Washington 99163. Project 1949. Financed in part by the Washington State Potato Commission.
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Iritani, W.M., Weller, L.D. Relationship of specific gravity to sugar accumulation in stored Norgold and Russet Burbank potatoes. American Potato Journal 53, 57–65 (1976). https://doi.org/10.1007/BF02852655
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DOI: https://doi.org/10.1007/BF02852655