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Coelho,Rubens D.; Vellame,Lucas M.; Fraga Júnior,Eusímio F.. |
Most studies on measures of transpiration of plants, especially woody fruit, relies on methods of heat supply in the trunk. This study aimed to calibrate the Thermal Dissipation Probe Method (TDP) to estimate the transpiration, study the effects of natural thermal gradients and determine the relation between outside diameter and area of xylem in 'Valencia' orange young plants. TDP were installed in 40 orange plants of 15 months old, planted in boxes of 500 L, in a greenhouse. It was tested the correction of the natural thermal differences (DTN) for the estimation based on two unheated probes. The area of the conductive section was related to the outside diameter of the stem by means of polynomial regression. The equation for estimation of sap flow was... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lysimetry; Sap flow; Xylem. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000300016 |
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Carvalho,Ellen Cristina Dantas; Martins,Fernando Roberto; Soares,Arlete Aparecida; Oliveira,Rafael Silva; Muniz,Celli Rodrigues; Araújo,Francisca Soares. |
Xylem anatomical traits can provide insights regarding the mechanisms affecting the distribution of vascular plants across environmental gradients. In this study, we aimed to investigate the hypothesis that lianas occurring in semiarid environments have characteristics that maximize the xylem resistance to tension-induced cavitation along the root-stem-branch continuum. To gather information regarding the hydraulic architecture of the lianas, we analyzed several anatomical traits of wood: cross-sectional area occupied by the parenchyma (AP), fibers (AF), and vessels (AV); average vessel diameter (d); wood density (WD); pit diameter in the vessel wall (dpit); pit density (Npit), and potential hydraulic conductivity (Kp) in branches, stems, and roots of... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Potential hydraulic conductivity; Vessel diameter; Wood anatomy; Wood density; Xylem. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000200198 |
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