Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-25T07:03:53.383Z Has data issue: false hasContentIssue false
  • English
  • Français

Experiments to examine the significance of ammonia evolution from barley seedlings infected with the powdery mildew fungus, Erysiphe graminis f.sp. hordei

Published online by Cambridge University Press:  27 March 2009

J. F. Jenkyn  and
M. E. Finney
J. F. Jenkyn
Affiliation:
Rothamsted Experimental Station, Harpenden, Hertfordshire, AL5 2JQ
Get access Rights & Permissions [Opens in a new window]

Summary

Experiments using intact seedlings and detached leaves failed to confirm previous reports that ammonia gas is evolved from barley leaves during the establishment of infection by the powdery mildew fungus Erysiphe graminis f.sp. hordei.

In the experiments using intact seedlings infection did, however, lead to greater concentrations of ammonium nitrogen in the senescing leaves and, in one experiment, the subsequent evolution of ammonia gas from these seedlings. Losses of nitrogen as ammonia gas from crops are probably small, but it is possible that under some circumstances they may represent a significant proportion of the otherwise unexplained nitrogen losses and hence be important in experiments which aim to study the nitrogen balance of crop-soil systems.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 102 , Issue 3 , June 1984 , pp. 679 - 685
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

Church, B. M. (1981). Use of fertilisers in England and Wales, 1980. Report of the Rothamsted Experimental Station for 1980, Part 2, pp. 115–122.Google Scholar
Church, B. M. & Lewis, D. A. (1977). Information from the survey of fertilizer practice, 1942–1976. Outlook on Agriculture 9, 186–193.CrossRefGoogle Scholar
Dilz, K. & Schepers, J. H. (1972). Stikstofbemesting van granen. 24. Effekt van ziektebestrijding op de stikstofreaktie van winter- en zomertarwe met en zonder toepassing van chloormequat. Stikstof 71, 452–458.Google Scholar
Ellen, J. & Spiertz, J. H. J. (1975). The influence of nitrogen and benlate on leaf-area duration, grain growth and pattern of N-, P- and K-uptake of winter wheat (Triticum aestivum). Zeilschrifl für Acker-und Pflanzenbau 141, 231–239.Google Scholar
Finney, M. E. (1979). The influence of infection by Erysiphe graminis DC. on the senescence of the first leaf of barley. Physiological Plant Pathology 14, 31–36.CrossRefGoogle Scholar
Jenkyn, J. F. (1977). Nitrogen and leaf diseases of spring barley. Fertilizer Use and Plant Health, Proceedings of the 12th Colloquium of the International Potash Institute, Izmir, Turkey, pp. 119–128.Google Scholar
Jenkyn, J. F., Finney, M. E. & Dyke, G. V. (1983). Effects of nitrogen fertilizer and tridemorph on mildew, growth and yield of spring barley 1975–7. Journal of Agricultural Science, Cambridge 101, 517–546.CrossRefGoogle Scholar
Jenkyn, J. F., Hirst, J. M. & King, G. (1973). An apparatus for the isolated propagation of foliar pathogens and their hosts. Annals of Applied Biology 73, 9–13.CrossRefGoogle Scholar
Last, F. T. (1962). Analysis of the effects of Erysiphe graminis DC. on the growth of barley. Annals of Botany, N.S. 26, 279–289.CrossRefGoogle Scholar
Powlson, D. S., Jenkinson, D. S., Pruden, G. & Johnston, A. E. (1983). Report of the Rothamsted Experimental Station for 1982, Part 1, p. 263.Google Scholar
Sadler, R. & Scott, K. J. (1974). Nitrogen assimilation and metabolism in barley leaves infected with the powdery mildew fungus. Physiological Plant Pathology 4, 235–247.CrossRefGoogle Scholar
Wetselaar, R. & Farquhar, G. D. (1980). Nitrogen losses from tops of plants. Advances in Agronomy 33, 263–302.CrossRefGoogle Scholar