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A radioactive tracer technique for the direct measurement of the diffusion resistance of stomata
Year:
1968
Source of publication :
Journal of Experimental Botany
Authors :
Moreshet, Samuel
;
.
Stanhill, Gerald
;
.
Volume :
19
Co-Authors:
Moreshet, S., Division of Agricultural Meteorology, The Volcani Institute of Agricultural Research, Rehovot, Israel
Stanhill, G., Division of Agricultural Meteorology, The Volcani Institute of Agricultural Research, Rehovot, Israel
Koller, D., Department of Botany, The Hebrew University, Jerusalem, Israel
Facilitators :
From page:
460
To page:
467
(
Total pages:
8
)
Abstract:
A new method is described for measuring the stomatal resistance to diffusion in leaves. It consists of measuring the radioactivity of air samples which have diffused through a leaf from a porometer container enriched with radioactive argon(41A). Details of the calibration are given together with the methods adopted to determine the accuracy of measurement and the optimum time of sampling. Results suggest that in the material investigated the measurements obtained are essentially those of stomatal resistance.In one small experiment inter and intra plant variability in stomatal resistance was investigated; in another, the diffusion porometer was used to compare the daily march of stomatal resistance with the rate of transpiration in plants growing under four different soil-moisture regimes. © 1968 Oxford University Press.
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More details
DOI :
10.1093/jxb/19.3.460
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
19003
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:25
Scientific Publication
A radioactive tracer technique for the direct measurement of the diffusion resistance of stomata
19
Moreshet, S., Division of Agricultural Meteorology, The Volcani Institute of Agricultural Research, Rehovot, Israel
Stanhill, G., Division of Agricultural Meteorology, The Volcani Institute of Agricultural Research, Rehovot, Israel
Koller, D., Department of Botany, The Hebrew University, Jerusalem, Israel
A radioactive tracer technique for the direct measurement of the diffusion resistance of stomata
A new method is described for measuring the stomatal resistance to diffusion in leaves. It consists of measuring the radioactivity of air samples which have diffused through a leaf from a porometer container enriched with radioactive argon(41A). Details of the calibration are given together with the methods adopted to determine the accuracy of measurement and the optimum time of sampling. Results suggest that in the material investigated the measurements obtained are essentially those of stomatal resistance.In one small experiment inter and intra plant variability in stomatal resistance was investigated; in another, the diffusion porometer was used to compare the daily march of stomatal resistance with the rate of transpiration in plants growing under four different soil-moisture regimes. © 1968 Oxford University Press.
Scientific Publication
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