[Respuesta de los estomas a variables ambientales en plantas de café al sol y bajo sombra en
The influence of air temperature (T), vapour pressure deficit (vpd), irradiance (Q) and leaf water potential on diurnal stomatal movement of coffee plants was examined under field and controlled environmental conditions. Leaves of plants grown under shade had larger stomatal conductance (g) values than plants grown in open sun. Stomatal responses to vpd under constant temperature conditions were very strong, indicating that ambient humidity could play a major role in controlling stomatal aperture. Changes in g as vpd increased probably contributed to observed reductions in the rate of net photosynthesis (Pn), though the effect of vpd on Pn was smaller
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| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
Jul
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| Subjects: | COFFEA ARABICA, CULTIVO, SOMBRA, ESTOMA, EFECTOS DEL MEDIO AMBIENTE, MEXICO, TEMPERATURA DEL AIRE, PRESION ATMOSFERICA, RADIACIONES, HOJAS, CONTENIDO DE HUMEDAD, BOURBON, CATURRA, CULTIVO BAJO SOMBRA, CULTIVO BAJO SOL, |
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| Summary: | The influence of air temperature (T), vapour pressure deficit (vpd), irradiance (Q) and leaf water potential on diurnal stomatal movement of coffee plants was examined under field and controlled environmental conditions. Leaves of plants grown under shade had larger stomatal conductance (g) values than plants grown in open sun. Stomatal responses to vpd under constant temperature conditions were very strong, indicating that ambient humidity could play a major role in controlling stomatal aperture. Changes in g as vpd increased probably contributed to observed reductions in the rate of net photosynthesis (Pn), though the effect of vpd on Pn was smaller |
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