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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: Contributor(s): Material type: ArticleArticleLanguage: 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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Journal Article Journal Article CIAT Library Document collection CINFOS Document Collection CINFOS 23221 (Browse shelf(Opens below)) c.1 Short Loan 100058348
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23218 Bacteriose (Xanthomonas campestris pv. manihotis) da mandioca na Regiao Norte do Estado do Espirito Santo 23219 Avaliacao de cultivares de mandioca em relacao a antracnose (Colletotrichum gloeosporioides f. sp. manihotis) 23220 Armazenamento pos-colheita de mandioca: 1. Influencia da composicao quimica de raizes de cultivares de mandioca sobre a resistencia a deterioracao pos-colheita (fisiologica e microbiologica) 23221 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 23222 Armazenamento pos-colheita de mandioca: 3. Efeito de alteracoes fisico-quimicas e quimicas sobre a resistencia de cultivares de mandioca a deterioracao microbiologica 23223 Armazenamento pos-colheita de mandioca: 4. Efeito de tratamentos quimicos no controle da deterioracao microbiologica em pos-colheita de cultivares de mandioca 23224 Metodos para extracao de lipopolissacarideos de Xanthomonas campestris pv. manihotis (Berthet & Bondar, 1915) dye, 1978

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

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