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Evaluation of the hydraulic press for measurement of leaf water potentials in cassava

Published online by Cambridge University Press:  27 March 2009

J. A. Palta
J. A. Palta
Affiliation:
Centro International de Agricuitura Tropical, Cali, Colombia, South America
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Summary

In the application of the Scholander pressure chamber technique to cassava water relations studies, the leaf water potential measured on central lobules was initially compared with that measured on entire leaves (including petiole). Measurements made using both a Campbell-Brewster hydraulic press and a pressure chamber of the leaf water potential in six different cassava clones were also compared. Although the central lobules showed a greater sensitivity to moisture loss after sampling than entire leaves, their leaf water potential was in close agreement with those measured on the entire leaves (r3 = 0·96). Therefore, for routine and field estimates in cassava, measurements made on the central lobules may be used to avoid the large reduction in total leaf area. The Campbell-Brewster hydraulic press satisfactorily estimated leaf water potential in M.Col. 1684 clone, which had the longest and narrowest lobules, but in other clones the leaf water potential was overestimated at high leaf potential (> -12·5) and underestimated at low water potentials (< -12·5). Over a wide range of leaf water potentials, a poor relationship between leaf water potentials estimated with hydraulic press and with the pressure chamber was observed for cassava because press estimates are influenced by lobule length and lobule width.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 101 , Issue 2 , October 1983 , pp. 407 - 410
Copyright
Copyright © Cambridge University Press 1983

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References

Baughan, J. W. & Tanner, C. B. (1976). Leaf water potential comparison of pressure chamber and in situ hygrometer on five herbaceous species. Crop Science 16, 181–184.CrossRefGoogle Scholar
Blum, A., Sullivan, C. Y. & Eastin, J. D. (1973). On the pressure chamber technique for estimating leaf water potential in sorghum. Agronomy Journal 65, 337–338.CrossRefGoogle Scholar
Boyer, J. S. & Ghorashy, A. (1971). Rapid field measurement of leaf water potential in soybean. Agronomy Journal 63, 344–345.CrossRefGoogle Scholar
Campbell, G. S. & Brewster, S. F. (1975). Leaf water potential and soil water content measurement with a simple hydraulic press. Paper presented at the Western Regional Research project W-67; Quantifications of Water-soil Plant Relations for Efficient Water Use, Honolulu, Hawaii, 01 1975.Google Scholar
Esau, K. (1965). Plant Anatomy. 2nd edn.New York: John Wiley and Sons.Google Scholar
Gandar, P. W. & Tanner, C. B. (1975). Comparison of methods for measuring leaf and tuber water potentials in potatoes. American Potato Journal 52,387–397.CrossRefGoogle Scholar
Hsiao, T. C. (1973). Plant responses to water stress. Annual Review of Plant Physiology 24, 419–570.CrossRefGoogle Scholar
Ike, I. F., Thurtell, G. A. & Stevenson, K. R. (1978). Evaluation of the pressure chamber technique for measurement of leaf water potential in cassava. Canadian Journal of Botany 14, 1638–1641.CrossRefGoogle Scholar
O'Toole, J. C. & Moya, T. B. (1978). Genotypic variation in maintenance of leaf water potential in rice. Crop Science 18, 873–876.CrossRefGoogle Scholar
Ritchie, G. A. & Hinckley, T. M. (1975). The pressure chamber as an instrument for ecological research. Advances in Ecology Research 9, 165–254.CrossRefGoogle Scholar
Scholander, P. F., Hammel, H. T. & Bradstreet, E. D. (1965). Sap pressure in vascular plants. Science 148, 339–346.CrossRefGoogle ScholarPubMed
Turner, N. C. (1981). Techniques and experimental approaches for the measurement of plant water status. Plant and Soil 58, 339–366.CrossRefGoogle Scholar
Yegappan, T. M. (1978). Growth physiology of Helianthus annuus during water stress and recovery. Ph.D. thesis, Australian National University, Canberra, A.C.T., Australia.Google Scholar
Yegappan, T. M. & Mainstone, B. J. (1981). Comparisons between press and pressure chamber techniques for measuring leaf water potential. Experimental Agriculture 17, 75–84.CrossRefGoogle Scholar