Title: Gossypol Intake from Cottonseed Feedstuffs - A Performance Concern for Ruminants?
Abstract:Two major types of cottonseed are available in the US, Upland and Pima. Upland is a high-lint type of cottonseed that is generally fed whole, while Pima is a delinted type of cottonseed that is often ...Two major types of cottonseed are available in the US, Upland and Pima. Upland is a high-lint type of cottonseed that is generally fed whole, while Pima is a delinted type of cottonseed that is often fed either cracked or ground to improve nutrient utilization. The nutrient composition of the two types of cottonseed differs, and Pima is often considered nutritionally superior because of its higher fat and protein content. In addition, Pima cottonseed contains more gossypol than whole linted Upland cottonseed, and more of its gossypol is represented by the minus (-) isomer. Gossypol is a yellow, polyphenolic compound found primarily in the pigment glands of the cotton plant and it exists in both the free and bound forms. In the intact whole seed, gossypol is mostly found as free gossypol (FG). However, when cottonseed is processed, gossypol binds to proteins, possibly to the epsilon-amino group of lysine. Two distinct stereoisomer forms of gossypol occur in cottonseed, the plus (+) and the minus (-) isomer. The (-) isomer has greater biological activity and is retained in the body for a longer period of time. Ruminants with a well developed rumen microbial population are able to detoxify gossypol by converting free to bound gossypol within the rumen, thereby impeding its absorption into the blood. However, it is possible that feeding excessive amounts of gossypol in the free form may exceed this protective mechanism and impair animal performance.Read More
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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Cited By Count: 2
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