Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-30T04:24:27.072Z Has data issue: false hasContentIssue false
  • English
  • Français

The measurement of leaf colour in grasses

Published online by Cambridge University Press:  27 March 2009

Madeline Hamill  and
M. S. Camlin
Madeline Hamill
Affiliation:
Agricultural Botany Department, The Queen's University of Belfast, Newforge Lane, Belfast, BT9 5PX
M. S. Camlin
Affiliation:
Agricultural Botany Research Division, Department of Agriculture for Northern Ireland, Plant Testing Station, Crossnacreevy, Belfast, BT6 9SH
Get access Rights & Permissions [Opens in a new window]

Summary

A method of assessing colour of grass leaves was developed to distinguish between cultivars. Leaves from a representative population of 60 plants of each cultivar were measured. To eliminate subjective judgment a colour difference meter was used, giving tristimulus values X, Y and Z (approximating to red, green and blue respectively), from which the colour co-ordinates L, a and b of the Commission Internationale de L'Eclairage system were calculated.

In a pilot study two visually distinguishable perennial ryegrass cultivars were easily separated (P <0·01) using the colour measurements. In a further examination comparing 23 cultivars, 68% of all possible cultivar pairs were separated (P <0·01).

Type
Research Article
Information
The Journal of Agricultural Science , Volume 103 , Issue 2 , October 1984 , pp. 387 - 393
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

REFERENCES

Commission Internationale De L'Eclatrage (1931). Proceedings of the Eighth Session. Paris: Bureau Central de la Commission International de L'Eclairage.Google Scholar
Commission Internationale De L'Eclairage (1978). Recommendations on uniform colour spaces, colour difference equations, psychometric colour terms, Supplement No. 2 to CIE Publication No. 15, (E-1.31) 1971,/(TC-1.3) 1978. Paris: Bureau Central de laCommission Internationale de L'Eclairage.Google Scholar
Hering, E. (1964). Outlines of a Theory of the Light Sense (translated by Hurvich, L. M. and Jameson, D.). Cambridge, Massachusetts: Harvard University.Google Scholar
International Union For The Protection Of New Varieties Of Plants (1980). Guidelines for the conduct of tests for distinctness, homogeneity and stability (Ryegrass) TG/4/4.Google Scholar
McLaren, K. (1981). L.a.b. Space: the key to successful intrumental shade passing. Journal of the Society of Dyers and Colourists 97, 498–502.CrossRefGoogle Scholar
Munsell, A. H. (1929). Munsell Book of Color. Maryland: Munsell Color Co.Google Scholar
Rahman, M. S. (1983). Relationship between visual colour rating and chlorophyll content, photosynthetic rate, and some growth characteristics in couchgrass (Cynodon spp. L.). Journal of Agricultural Science, Cambridge 100, 221–225.CrossRefGoogle Scholar
Sheridan, K. P. & McKee, G. W. (1970). Effect of variety, seed lot, soil pH, soil fertility and light on cotyledon and plant colour in Alfalfa. Crop Science 10, 336–338.CrossRefGoogle Scholar
Weatherup, S. T. C. (1980). Statistical procedure of distinctness, uniformity and stability variety trials. Journal of Agricultural Science, Cambridge 94, 31–46.CrossRefGoogle Scholar