Hostname: page-component-745bb68f8f-lrblm Total loading time: 0 Render date: 2025-01-10T14:37:52.170Z Has data issue: false hasContentIssue false
  • English
  • Français

Seasonal changes in the inner root sheath of the primary follicles in Herdwick sheep

Published online by Cambridge University Press:  27 March 2009

G. C. Priestley
G. C. Priestley
Affiliation:
Department of Textile Industries, University of Leeds
Get access Rights & Permissions [Opens in a new window]

Extract

The histology of the skin follicles of a small group of Herdwick ewes was examined in midwinter and again in midsummer. In the primary follicles which remained active (about 9 % of the total follicle population) the ‘winter thinning’ in the fibre was accompanied by a thickening of the Huxley layer in the inner root sheath. In heterotype fibres (from primary follicles) a poorly defined crimp and a bilaterally differentiated cortex were present only in the thin length of fibre grown in winter.

The author is grateful to Dr. Marca Burns for permission to sample her Herdwick flock, and to Dr K. M. Rudall for helpful advice. This work was carried out while the author held a grant from the Agricultural Research Council.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 69 , Issue 1 , August 1967 , pp. 9 - 12
Copyright
Copyright © Cambridge University Press 1967

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

Auber, L. (1951). The anatomy of follicles producing wool fibres with special reference to keratinization. Trans. R. Soc. Edinb. 62, 191–254.CrossRefGoogle Scholar
Aubeb, L. & Bydee, M. L. (1956). Anomalies in structure and development of wool fibres. Proc. Int. Wool Res. Conf. Aust. 1955, F, pp. 36–62.Google Scholar
Burns, M. (1954). The development of the fleece and follicle population in Herdwick sheep. J. agric. Sci., Camb. 44, 443–64.CrossRefGoogle Scholar
Chapman, R. E., Short, B. F. & Hyland, P. G. (1960). Abnormal crimping in Merino and Polwarth wools. Nature, Lond. 187, 960–1.CrossRefGoogle Scholar
Doney, J. M. & Smith, W. F. (1961). The fleece of the Scottish Blackface sheep. I. Seasonal changes in wool production and fleece structure J. agric. Sci., Camb. 56, 365–374.CrossRefGoogle Scholar
Fraser, R. B. D. & Rogers, G. E. (1955). The bilateral structure of wool cortex and its relation to crimp. Aust. J. biol. Sci. 8, 288–9.CrossRefGoogle Scholar
Horio, M. & Kondo, T. (1953). Crimping of wool fibres. Text. Res. J. 23, 373–86.CrossRefGoogle Scholar
Mercer, E. H. (1953). The heterogeneity of the wool keratin fibres. Text. Res. J. 23, 388–400.CrossRefGoogle Scholar
Pincus, H. (1951). Multiple hairs (Flemming-Giovannini). J. invest. Derm. 17, 291–301.CrossRefGoogle Scholar
Priestley, G. C. (1964). Studies of the activity and morphology of skin follicles in sheep, rats and other mammals. Ph.D. Thesis, University of Leeds.Google Scholar
Priestley, G. C. (1966). Ortho- and paracortex in animal hairs. J. Text. Inst. 57, T438–40.CrossRefGoogle Scholar
Priestley, G. C. (1967). Histological studies of the skin follicle types of the rat, with special reference to the structure of the Huxley layer. J. Anat. 101, 491–504.Google Scholar
Priestley, G. C. & Rudall, K. M. (1965). Modifications in the Huxley layer associated with changes in fibre diameter and output. In Biology of the Skin and Hair Growth, p. 165. Eds. Lyne, A. G. and Short, B. F.. Sydney: Angus and Robertson.Google Scholar
Rogers, G. E. (1959). Newer findings in the enzymes and proteins of hair follicles. Ann. N. Y. Acad. Sci. 83, 408–28.CrossRefGoogle ScholarPubMed
Ryder, M. L. (1956). Observations of nutritional and seasonal changes in fleeces of some Masham sheep. J. agric. Sci., Camb. 47, 129–44.Google Scholar
Ryder, M. L. & Auber, L. (1954). Abnormal growths associated with wool follicles in sheep. Nature, Lond. 174, 743–4.CrossRefGoogle Scholar
Straile, W. E. (1965). Root sheath-dermal papilla relationships and the control of hair growth. In Biology of the Skin and Hair Qrowth, p. 35. Eds. Lyne, A. G. and Short, B. F.. Sydney: Angus and Robertson.Google Scholar
Thorsen, W. E. (1958). Estimation of cortical components in various wools. Text. Res. J. 28, 185–97CrossRefGoogle Scholar