Armazenamento pos-colheita de mandioca: 2. Efeito das alteracoes no grau de deterioracao fisiologica na composicao fisico- quimica e quimica de seis cultivares de mandioca

By:

CARVALHO, V.D. DE

Contributor(s):

Material type: Article

ArticleLanguage: Portuguese Description: 1(1):25-34Subject(s): LOC classification:

23221

In: Revista Brasileira de MandiocaSummary: A los 0, 2, 4, 6 y 8 dias de almacenamiento poscosecha de raices de yuca, se correlaciono el grado de deterioracion fisiologica (DF) con los contenidos de: humedad; azucares reductores, no reductores y totales; compuestos fenolicos totales; y fenoles monomericos, dimericos, oligomericos y polimericos. Las var. de yuca utilizadas fueron Mantiqueira, Guaxupe, Sonora y Branca de Santa Catarina (resistentes a DF), e Iracema e IAC-12829 (sus-ceptibles a DF). La DF aumento a medida que el contenido de humedad de la raiz disminuia. Las var. de yuca fueron asignadas con un grado de 5 de DF cuando el contenido de humedad estuvo en el rango de 55.10-58.35 por ciento . Los cambios en el patron de los contenidos de almidon y de azucares variaron segun la var. analizada. Las var. Sonora, Iracema, IAC 12829 y Guaxupe presentaron correlaciones positivas entre el grado de DF y el contenido de fenoles monomericos durante los periodos de almacenamiento. No se observo relacion entre la disminucion inicial del contenido de fenoles totales y la resistencia o susceptibilidad a DF. (RA-CIAT)Summary: At 0, 2, 4, 6, and 8 days of postharvest storage of cassava roots, the degree of physiological deterioration (PD) was correlated with contents of moisture; reducing, nonreducing, and total sugars; total phenolic compounds; mono-, di-, oligo-, and polymeric phenols. Cassava var. employed were Mantiqueira, Guaxupe, Sonora, and Branca de Santa Catarina (PD-resistant), and Iracema and IAC-12829 (PD-susceptible). PD increased as root MC decreased. Cassava var. were scored with degree 5 of PD when root MC ranged from 55.10 to 58.35 percent. The pattern changes of starch and sugar contents varied depending on the var. analyzed. Var. Sonora, Iracema, IAC-12829, and Guaxupe presented significant positive correlations between the degree of PD and monomeric phenolic content during storage periods. No relation between the initial decrease in total phenolic content and PD resistance or susceptibility was observed. (AS)

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Holdings
Item type	Current library	Collection	Call number	Copy number	Status	Date due	Barcode	Item holds
Journal Article	CIAT Library Document collection CINFOS	Document Collection CINFOS	23221 (Browse shelf(Opens below))	c.1	Short Loan		100058348

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A los 0, 2, 4, 6 y 8 dias de almacenamiento poscosecha de raices de yuca, se correlaciono el grado de deterioracion fisiologica (DF) con los contenidos de: humedad; azucares reductores, no reductores y totales; compuestos fenolicos totales; y fenoles monomericos, dimericos, oligomericos y polimericos. Las var. de yuca utilizadas fueron Mantiqueira, Guaxupe, Sonora y Branca de Santa Catarina (resistentes a DF), e Iracema e IAC-12829 (sus-ceptibles a DF). La DF aumento a medida que el contenido de humedad de la raiz disminuia. Las var. de yuca fueron asignadas con un grado de 5 de DF cuando el contenido de humedad estuvo en el rango de 55.10-58.35 por ciento . Los cambios en el patron de los contenidos de almidon y de azucares variaron segun la var. analizada. Las var. Sonora, Iracema, IAC 12829 y Guaxupe presentaron correlaciones positivas entre el grado de DF y el contenido de fenoles monomericos durante los periodos de almacenamiento. No se observo relacion entre la disminucion inicial del contenido de fenoles totales y la resistencia o susceptibilidad a DF. (RA-CIAT) spa

At 0, 2, 4, 6, and 8 days of postharvest storage of cassava roots, the degree of physiological deterioration (PD) was correlated with contents of moisture; reducing, nonreducing, and total sugars; total phenolic compounds; mono-, di-, oligo-, and polymeric phenols. Cassava var. employed were Mantiqueira, Guaxupe, Sonora, and Branca de Santa Catarina (PD-resistant), and Iracema and IAC-12829 (PD-susceptible). PD increased as root MC decreased. Cassava var. were scored with degree 5 of PD when root MC ranged from 55.10 to 58.35 percent. The pattern changes of starch and sugar contents varied depending on the var. analyzed. Var. Sonora, Iracema, IAC-12829, and Guaxupe presented significant positive correlations between the degree of PD and monomeric phenolic content during storage periods. No relation between the initial decrease in total phenolic content and PD resistance or susceptibility was observed. (AS) eng