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Condutancia foliar em cultivares de mandioca

By: Material type: ArticleArticleLanguage: Portuguese Description: 1(1):93-98Subject(s): LOC classification:
  • 36973
Online resources: In: Revista Brasileira de Fisiología VegetalSummary: Se midio la conductancia foliar (Cf) a medio dia, en 6 dias diferentes, durante un periodo exptl. de 44 dias, mediante un porometro de difusion, en plantas de yuca cultivadas en el campo. Los datos originales de resistencia difusiva foliar (Rf) se transformaron en Cf, utilizando la relacion Cf = 1/Rf. Se realizaron mediciones en 10 genotipos de yuca que conformaron el Ensayo Avanzado 85/86, en el Centro Nacional de Investigacion en Yuca y Frutales de EMBRAPA, ubicado en Cruz das Almas, Estado de Bahia. La conductancia foliar se redujo con el tiempo, despues de un periodo de sequia, relacionandose con un aumento leve en la temp. foliar, que dependia tanto de la HR como del fotoperiodo. El cv. Isabel de Souza (BGM 555) y el clon CPM 91-13 mostraron los mayores valores de Cf, mientras que los menores valores se encontraron en los cv. Cigana Preta (BGM 116) y Passarinha (BGM 560). Todos los genotipos redujeron la Cf a HR baja, sugiriendo una relacion cercana negativa entre conductancia y humedad atmosferica. (RA-CIAT)Summary: Leaf conductance (Cf) was measured at mid-day, on six different days, during an experimental period of 44 days, using a diffusive porometer, in field-grown cassava plants. Original data on leaf diffusive resistance (Rf) were transformed in Cf, by using the relation Cf = 1/Rf. Measurements were taken in 10 cassava genotypes which formed the Advanced Test 85/86 in EMBRAPA's National Research Center for Cassava and Fruit Crops, located in Cruz das Almas, State of Bahia. Leaf conductance was reduced with time, following a dry period, being associated with a slight increase in leaf temperature, both dependent on relative humidity and hours of sunlight. Cultivar Isabel de Souza (BGM 555) and clone CPM 91-13 showed the highest values of Cf, while the lowest values were determined in cultivars Cigana Preta (BGM 116) and Passarinha (BGM 560). All genotypes reduced Cf at low relative humidity, suggesting a close negative association between conductance and atmospheric humidity. (AS)
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Journal Article Journal Article CIAT Library Document collection CINFOS Document Collection CINFOS 36973 (Browse shelf(Opens below)) c.1 Short Loan 100056152
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Se midio la conductancia foliar (Cf) a medio dia, en 6 dias diferentes, durante un periodo exptl. de 44 dias, mediante un porometro de difusion, en plantas de yuca cultivadas en el campo. Los datos originales de resistencia difusiva foliar (Rf) se transformaron en Cf, utilizando la relacion Cf = 1/Rf. Se realizaron mediciones en 10 genotipos de yuca que conformaron el Ensayo Avanzado 85/86, en el Centro Nacional de Investigacion en Yuca y Frutales de EMBRAPA, ubicado en Cruz das Almas, Estado de Bahia. La conductancia foliar se redujo con el tiempo, despues de un periodo de sequia, relacionandose con un aumento leve en la temp. foliar, que dependia tanto de la HR como del fotoperiodo. El cv. Isabel de Souza (BGM 555) y el clon CPM 91-13 mostraron los mayores valores de Cf, mientras que los menores valores se encontraron en los cv. Cigana Preta (BGM 116) y Passarinha (BGM 560). Todos los genotipos redujeron la Cf a HR baja, sugiriendo una relacion cercana negativa entre conductancia y humedad atmosferica. (RA-CIAT)

Leaf conductance (Cf) was measured at mid-day, on six different days, during an experimental period of 44 days, using a diffusive porometer, in field-grown cassava plants. Original data on leaf diffusive resistance (Rf) were transformed in Cf, by using the relation Cf = 1/Rf. Measurements were taken in 10 cassava genotypes which formed the Advanced Test 85/86 in EMBRAPA's National Research Center for Cassava and Fruit Crops, located in Cruz das Almas, State of Bahia. Leaf conductance was reduced with time, following a dry period, being associated with a slight increase in leaf temperature, both dependent on relative humidity and hours of sunlight. Cultivar Isabel de Souza (BGM 555) and clone CPM 91-13 showed the highest values of Cf, while the lowest values were determined in cultivars Cigana Preta (BGM 116) and Passarinha (BGM 560). All genotypes reduced Cf at low relative humidity, suggesting a close negative association between conductance and atmospheric humidity. (AS)

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