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קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
A biophysical analysis of stem and root diameter variations in woody plants
Year:
2001
Authors :
פישמן, ס'
;
.
Volume :
126
Co-Authors:
Génard, M., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Fishman, S., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Vercambre, G., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Huguet, J.-G., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Bussi, C., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Besset, J., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Habib, R., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Facilitators :
From page:
188
To page:
202
(
Total pages:
15
)
Abstract:
A comprehensive model of stem and root diameter variation was developed. The stem (or root) was represented using two coaxial cylinders corresponding with the mature xylem and the extensible tissues. The extensible tissues were assumed to behave as a single cell separated from the mature xylem by a virtual membrane. The mature xylem and the extensible tissues are able to dilate with temperature and grow. Moreover, the extensible tissues are able to shrink and swell according to water flow intensity. The model is mainly based on the calculation of water volume flows in the "single cell" that are described using the principles of irreversible thermodynamics. The elastic response to storage volume and plastic extension accompanying growth are described. The model simulates diameter variation due to temperature, solute accumulation, and xylem, water potential. The model was applied to the peach (Prunus persica) stem and to the plum (Prunus domestica x Prunus spinosa) root. The simulation outputs corresponded well with the diameter variation observed. The model predicts that variations of turgor pressure and osmotic potential are smaller than the variations of xylem water potential. It also demonstrates correlations between the xylem water potential, the turgor pressure, the elastic modulus, and the osmotic potential. The relationship between the diameter and the xylem water potential exhibits a subtential hysteresis, as observed in field data. A sensitivity analysis using the model parameters showed that growth and shrinkage were highly sensitive to the initial values of the turgor pressure and to the reflection coefficient of solutes. Shrinkage and growth were sensitive to elastic modulus and wall-yielding threshold pressure, respectively. The model was not sensitive to changes in temperature.
Note:
Related Files :
Biophysics
computer simulation
Hysteresis
plant
plant morphology
Prunus persica
shrinkage
swelling
water
עוד תגיות
תוכן קשור
More details
DOI :
10.1104/pp.126.1.188
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
28857
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:42
Scientific Publication
A biophysical analysis of stem and root diameter variations in woody plants
126
Génard, M., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Fishman, S., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Vercambre, G., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Huguet, J.-G., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Bussi, C., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Besset, J., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
Habib, R., Unite Rech. en Ecophysiol. et Hort., Inst. Natl. de la Rech. Agronomique, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France
A biophysical analysis of stem and root diameter variations in woody plants
A comprehensive model of stem and root diameter variation was developed. The stem (or root) was represented using two coaxial cylinders corresponding with the mature xylem and the extensible tissues. The extensible tissues were assumed to behave as a single cell separated from the mature xylem by a virtual membrane. The mature xylem and the extensible tissues are able to dilate with temperature and grow. Moreover, the extensible tissues are able to shrink and swell according to water flow intensity. The model is mainly based on the calculation of water volume flows in the "single cell" that are described using the principles of irreversible thermodynamics. The elastic response to storage volume and plastic extension accompanying growth are described. The model simulates diameter variation due to temperature, solute accumulation, and xylem, water potential. The model was applied to the peach (Prunus persica) stem and to the plum (Prunus domestica x Prunus spinosa) root. The simulation outputs corresponded well with the diameter variation observed. The model predicts that variations of turgor pressure and osmotic potential are smaller than the variations of xylem water potential. It also demonstrates correlations between the xylem water potential, the turgor pressure, the elastic modulus, and the osmotic potential. The relationship between the diameter and the xylem water potential exhibits a subtential hysteresis, as observed in field data. A sensitivity analysis using the model parameters showed that growth and shrinkage were highly sensitive to the initial values of the turgor pressure and to the reflection coefficient of solutes. Shrinkage and growth were sensitive to elastic modulus and wall-yielding threshold pressure, respectively. The model was not sensitive to changes in temperature.
Scientific Publication
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