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פותח על ידי קלירמאש פתרונות בע"מ -
Resistance to water uptake in a mature citrus tree
Year:
1983
Source of publication :
Journal of Experimental Botany
Authors :
כהן, יחזקאל
;
.
כהן, שבתאי
;
.
פוקס, מרסל
;
.
Volume :
34
Co-Authors:
Cohen, Y., Division of Agricultural Meteorology, A.R.O., Bet Dagan, Israel
Fuchs, M., Division of Agricultural Meteorology, A.R.O., Bet Dagan, Israel
Cohen, S., Division of Agricultural Meteorology, A.R.O., Bet Dagan, Israel
Facilitators :
From page:
451
To page:
460
(
Total pages:
10
)
Abstract:
Resistance to water uptake in an irrigated and a water-stressed 22-year-old citrus tree was examined during 7 weeks. Frequent irrigation maintained the soil water potential of one citrus tree between 0.0 and -0.016 MPa in the upper 0.6 m, while the other tree received no water for 44 d. Sap flow in the trunks was measured once a week from dawn to dusk at hourly intervals with a calibrated heat pulse technique. At the same time leaf water potential was measured on sunlit and shaded leaves.Sap flow in the stressed tree decreased with time at a higher rate than the water potential difference between soil and leaf, which implies an increase in the resistance of the transport system. Diurnal sap flow and diurnal leaf water potential of the irrigated and stressed trees were linearly related throughout the experimental period. The slope of the linear relationship between flow and potential for both trees remained nearly constant, indicating that the resistance within the tree remained constant. The effect of drying appeared to be a progressive decline of the leaf water potential at zero flow (computed by linear regression). This was ascribed to a reduction of the transport of water in the soil toward the roots. © 1983 Oxford University Press.
Note:
Related Files :
Leaf water potential
plant water relations
Soil water stress
transpiration
עוד תגיות
תוכן קשור
More details
DOI :
10.1093/jxb/34.4.451
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
22027
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:48
Scientific Publication
Resistance to water uptake in a mature citrus tree
34
Cohen, Y., Division of Agricultural Meteorology, A.R.O., Bet Dagan, Israel
Fuchs, M., Division of Agricultural Meteorology, A.R.O., Bet Dagan, Israel
Cohen, S., Division of Agricultural Meteorology, A.R.O., Bet Dagan, Israel
Resistance to water uptake in a mature citrus tree
Resistance to water uptake in an irrigated and a water-stressed 22-year-old citrus tree was examined during 7 weeks. Frequent irrigation maintained the soil water potential of one citrus tree between 0.0 and -0.016 MPa in the upper 0.6 m, while the other tree received no water for 44 d. Sap flow in the trunks was measured once a week from dawn to dusk at hourly intervals with a calibrated heat pulse technique. At the same time leaf water potential was measured on sunlit and shaded leaves.Sap flow in the stressed tree decreased with time at a higher rate than the water potential difference between soil and leaf, which implies an increase in the resistance of the transport system. Diurnal sap flow and diurnal leaf water potential of the irrigated and stressed trees were linearly related throughout the experimental period. The slope of the linear relationship between flow and potential for both trees remained nearly constant, indicating that the resistance within the tree remained constant. The effect of drying appeared to be a progressive decline of the leaf water potential at zero flow (computed by linear regression). This was ascribed to a reduction of the transport of water in the soil toward the roots. © 1983 Oxford University Press.
Scientific Publication
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