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Abstract
COTTONSEED MEAL in the rations of laying hens has been known for some time to produce olive colored yolks and pink whites in cold stored eggs. The olive color was reported by Heywang et al. (1955) to be caused by free gossypol and the pink discoloration was reported by Mason et al. (1957) and by Shenstone and Vickery (1959) to be caused by cyclopropenoid fatty acids. Also, cyclopropenoid fatty acids were found by Kemmerer et al. (1962) to have an enhancing effect on the capacity of gossypol to cause olive discoloration.Several reports have shown that ferrous iron reacts with gossypol. Jonassen and Demint, (1955) showed that sodium gossypolate reacted with ferrous iron in a 1:1 molar ratio. Kemmerer et al. (1961) speculated from their research that the egg yolk discolor caused by gossypol was due to the formation of a ferrous iron-gossypol complex, and that formation of the complex …
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