Influence of nutrition on the crimping rate of wool and the type and proportion of constituent proteins.

Australian Journal of Biological Sciences
M E CampbellJ M Gillespie

Abstract

When the nutritional level of sheep is restricted, the staple crimp frequency of the resultant fleece increases substantially whereas the cystine and high-sulphur protein contents decrease. This is in marked contrast to the direct relationship between crimp frequency and cystine content among sheep. These observations can be reconciled by assuming that variations in crimp frequency are attributable solely to a combination of follicle shape and fibre length growth rate without recourse to the more generally accepted theories relating to the proportion and distribution of ortho- and paracortical cells in the firbre cortex. The major portion of the decrease in the cystine content of high-crimp wools is due to the decreased synthesis of a specific protein fraction (ultra-high-sulphur protein) as would be expected from the results of dietary supplementation experiments. Low-crimp wools do not appear to contain this protein fraction and in this respect they may differ from high-crimp wools.

Citations

Mar 10, 2016·American Journal of Physical Anthropology·Tina LasisiColin N Shaw
Jul 10, 2018·Animal : an International Journal of Animal Bioscience·J PlowmanA M de Almeida
Oct 15, 2019·Experimental Dermatology·Franz J WortmannTherakanya Sripho
Jan 1, 1991·Electron Microscopy Reviews·R C MarshallJ M Gillespie

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