Hostname: page-component-78c5997874-8bhkd Total loading time: 0 Render date: 2024-11-03T01:09:25.095Z Has data issue: false hasContentIssue false
  • English
  • Français

Water relations of winter wheat. 5. The root system and osmotic adjustment in relation to crop evaporation

Published online by Cambridge University Press:  27 March 2009

M. McGowan ,
P. Blanch ,
P. J. Gregory  and
D. Haycock
M. McGowan
Affiliation:
Nottingham University School of Agriculture, Sutton Bonington, Loughborough, Leicester
P. Blanch
Affiliation:
Nottingham University School of Agriculture, Sutton Bonington, Loughborough, Leicester
P. J. Gregory
Affiliation:
Nottingham University School of Agriculture, Sutton Bonington, Loughborough, Leicester
D. Haycock
Affiliation:
Nottingham University School of Agriculture, Sutton Bonington, Loughborough, Leicester
Get access Rights & Permissions [Opens in a new window]

Summary

Shoot and root growth and associated leaf and soil water potential relations were compared in three consecutive crops of winter wheat grown in the same field. Despite a profuse root system the crop grown in the second drought year (1976) failed to dry the soil as throughly as the crops in 1975 and 1977. Measurements of plant water potential showed that the restricted utilization of soil water reserves by this crop was associated with failure to make any significant osmotic adjustment, leading to premature loss of leaf turgor and stomatal closure. The implications of these results for models to estimate actual crop evaporation from values of potential evaporation are discussed.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 102 , Issue 2 , April 1984 , pp. 415 - 425
Copyright
Copyright © Cambridge University Press 1984

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Begg, J. E. & Turner, N. C. (1976). Crop water deficits. Advances in Agronomy 28, 161–217.CrossRefGoogle Scholar
Black, C. R. & Squire, G. K. (1979). Effects of atmospheric saturation deficit on the stomatal conductance of pearl millet and groundnut. Journal of Experimental Botany 30, 935–945.CrossRefGoogle Scholar
Boyer, J. S. & McPherson, H. G. (1975). Physiology of water deficits in cereal. Advances in Agronomy 27, 1–22.CrossRefGoogle Scholar
Denmead, O. T. & Shaw, R. T. (1962). Availability of soil water to plants as affected by soil moisture content and meteorological conditions. Agronomy Journal 54, 385–390.CrossRefGoogle Scholar
Gregory, P. J., McGowan, M. & Biscoe, P. V. (1978). Water relations of winter wheat. 2. Soil water relations. Journal of Agricultural Science, Cambridge 91, 103–116.CrossRefGoogle Scholar
Gregory, P. J., McGowan, M., Biscoe, P. V. & Hunter, B. (1978). Water relations of winter wheat. 1. Growth of the root system. Journal of Agricultural Science, Cambridge 91, 91–102.CrossRefGoogle Scholar
Haycock, D. (1977). Water relations – a comparison of winter wheat and spring barley. B.Sc. Honours thesis, University of Nottingham.Google Scholar
Hsaio, T. C., Acevedo, E., Fereres, E. & Henderson, D. W. (1976). Water stress, growth and osmotic adjustment. Philosophical Transactions of Royal Society, London, Series B 273, 479–500.Google Scholar
Jones, M. M., Osmond, C. B. & Turner, N. C. (1980). Accumulation of solutes in leaves of sorghum and sunflower in response to water deficits. Australian Journal of Plant Physiology 7, 194–205.Google Scholar
Jones, M. M. & Turner, N. C. (1978). Osmotic adjustment in leaves of sorghum in response to water deficits. Plant Physiology 61, 122–126.CrossRefGoogle ScholarPubMed
McGowan, M. & Williams, J. B. (1980). The water balance of an agricultural catchment. I. Estimation of evaporation from soil water records. Journal of Soil Science 31, 217–230.CrossRefGoogle Scholar
Meyer, W. S. & Green, G. C. (1980). Water use by wheat plant indicators of available soil water. Agronomy Journal 72, 253–257.CrossRefGoogle Scholar
Munns, R. & Weir, R. (1981). Contribution of sugars to osmotic adjustment in elongating and expanding zones of wheat leaves during immediate water deficits and two light levels. Australian Journal of Plant Physiology 8, 93–105.Google Scholar
Passioura, J. B. (1972). The effect of root geometry on the yield of wheat growing on stored water. Australian Journal of Agricultural Research 23, 745–752.CrossRefGoogle Scholar
Passioura, J. B. (1976). Physiology of grain yield in wheat growing on stored water. Australian Journal of Plant Physiology 3, 559–565.Google Scholar
Penman, H. L. (1949). The dependence of transpiration on weather and soil conditions. Journal of Soil Science 1, 74–89.CrossRefGoogle Scholar
Rashid, N. M. (1980). Field studies of water and nutrient uptake by barley and wheat. Ph.D. thesis, University of Nottingham.Google Scholar
Ritchie, J. T., Burrett, E. & Henderson, R. C. (1972). Dryland evaporative flux in a subhumid climate. III. Soil water influence. Agronomy Journal 64, 168–173.CrossRefGoogle Scholar
Turner, N. C. & Jones, M. M. (1980). Turgor maintenance by osmotic adjustment, a review and evaluation. In Adaptation of Plants to Water and High Temperature Stress (ed. Turner, N. C. and Kramer, P. J.), pp. 87–103. New York: Wiley Interscience.Google Scholar
Wallace, J. S., Clark, J. A. & McGowan, M. (1983). Water relations of winter wheat. 3. Components of leaf water potential and the soil-plant water potential gradient. Journal of Agricultural Science, Cambridge 100, 581–589.CrossRefGoogle Scholar
Welbank, P. J., Gibbs, M. J., Taylor, P. J. & Williams, E. D. (1974). Root growth of cereal crops. Rothamsted Experimental Station Report, 1973. Part 2. pp. 26–66.Google Scholar