Abstract
Sound, hand harvested, whole potatoes were exposed to continuous flowing atmosphere containing air, air with 3 or 5% CO2, and air with concentrations of 0.5, 1.0, and 10ppm C2H4 for periods of 1 to 11 days at 20°C. At 1-day intervals, potatoes were bruised and black spot development assessed. Development of black spot in potatoes exposed to C2H4 was equal to or less than in potatoes at harvest. The severity remained low during 3-day exposure to 1 ppm C2H4 and after transfer to 4 days in air, then increased. Severity of black spot increased in potatoes exposed to air, with intermediate response from exposure to air with CO2. With an increase in sprouting, differences in black spot among treatments diminished. Less black spot developed in immature than in mature potatoes.
Resumen
Papas sanas, cosechadas a mano, fueron espuestas a un flujo atmosférico contínuo conteniendo aire, aire con 3 ó 5% de CO2, y aire con concentraciones de 0.5, l.Oy 10ppm de C2H4 por períodos de 1 a 11 días a 20°C. Con interválos de un día, las papas fueron magulladas y se determinó el desarrollo de la mancha negra. El desarrollo de la mancha negra en papas expuestas a C2H4 fue igual o menor que el de las papas al momento de la cosecha. La severidad se mantuvo baja durante una expositión por tres días a 1 ppm de C2H4 y después de transferirse al aire por cuatro días, entonces aumentó. La severidad de la mancha negra aumentó en papas expuestas al aire, con una respuesta intermedia de la exposición al aire con CO2. Con un incremento del brotamiento, la diferencia en mancha negra entre tratamientos disminuyó. Se desarrolló menos mancha negra en papas inmaduras que en papas maduras.
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Contribution of the Department of Vegetable Crops, University of California, Davis, California 95616, and USDA-ARS, Western Regional Laboratory, Berkeley, California 94710.
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Timm, H., Yamaguchi, M., Hughes, D.L. et al. Influence of ethylene on black spot of potato tubers. American Potato Journal 53, 49–56 (1976). https://doi.org/10.1007/BF02852654
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DOI: https://doi.org/10.1007/BF02852654