Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-03T05:32:47.155Z Has data issue: false hasContentIssue false
  • English
  • Français

Changes in the angle and curvature of the uppermost leaves of winter wheat

Published online by Cambridge University Press:  27 March 2009

J. P. Ledent
J. P. Ledent
Affiliation:
Laboratoire d'Ecologie Végétale, Universitéde Louvain, Belgium
Get access Rights & Permissions [Opens in a new window]

Summary

Each of the three uppermost leaves of wheat canopies studied in 1975 and 1976 showed a downward movement after its emergence. The variations with time of leaf angle were greatest in the flag leaf. Genotypes differed markedly in the rate of change with age in flag-leaf angle. Leaf curvature did not vary with age. There were differences between years in the rate of leaf movement, but cultivars ranked roughly the same in terms of leaf angle in each year. Grain yield per hectare was not related to leaf angle change. Most of the higher-yielding genotypes included in the study had straight leaves, the correlation between curvature and yield being —0·30 in 1975 and —0·60 in 1976.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 90 , Issue 2 , April 1978 , pp. 319 - 323
Copyright
Copyright © Cambridge University Press 1978

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

Austin, R. B., Ford, M. A., Edrich, J. A. & Hooper, B. E. (1976). Some effects of leaf posture on photosynthesis and yield in wheat. Annals of Applied Biology 88, 425–46.CrossRefGoogle Scholar
Chandler, R. F. (1969). Plant morphology and stand geometry in relation to nitrogen. In Photosynthetical Aspects of Crop Yield, (ed. Eastin, J. D., Haskins, F. A., Sullivan, C. V. and Van Bavel, C. H. M.), pp. 266–285. Madison: Crop Science Society of America.Google Scholar
De Wit, C. T. (1965). Photosynthesis of leaf canopies, Agricultural Research Reports, no. 663. Verslagen van Landbouwkundige Onderzoekingen.Google Scholar
Duncan, W. G. (1971). Leaf angles, leaf area and canopy photosynthesis. Crop Science 11, 482—5.CrossRefGoogle Scholar
Ledent, J. F. (1974 a). Plant geometry, canopy architecture and leaf angle in wheat. Ph.D. thesis, University of Minnesota, St Paul, Minnesota. 327 pp. University Microfilms, Ann Arbor Michigan (Dissertation Abstracts 74: 17).Google Scholar
Ledent, J. F. (1974 b). Photosynthèse nette et angle foliaire chez le froment de printemps (Triticum aestivum L.). Bulletin de l' Académie Royale de Belgique (Classe des Sciences) 60, 921–72.Google Scholar
Ledent, J. F. (1976). Anatomical aspects of leaf angle changes during growth in wheat. Phytomorphology 26, 309–14.Google Scholar
Ledent, J. F. (1978). Mechanisms determining leaf movement and leaf angle in wheat (Triticum aestivum L.). Annals of Botany (in the Press).Google Scholar
Lupton, F. G. H. (1972). Further experiments on photosynthesis and translocation in wheat. Annals of Applied Biology 71, 69–79.CrossRefGoogle Scholar
Ross, J. (1970). Mathematical models of photosynthesis in a plant stand. In Prediction and Measurement of Photosynthetic Productivity (ed. Setlik, I.), pp. 29–46. Proceedings of the IBP/PP Technical Meeting, Trebon, 09 1969. Wageningen, Centre for Agricultural Publishing and Documentation.Google Scholar
Trenbath, B. R. & Angus, J. F. (1975). Leaf inclination and crop production. Field Crops Abstracts 28, 231–44.Google Scholar