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Acta Prataculturae Sinica ›› 2026, Vol. 35 ›› Issue (7): 228-239.DOI: 10.11686/cyxb2025257

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Progress in research on the use of laccase to produce feed from cotton by-products

De-zhi LONG(), Zeng-zhao LIU, Fei-ran ZHOU()   

  1. Animal Husbandry Station of Hami City,Hami 839000,China
  • Received:2025-06-26 Revised:2025-10-23 Online:2026-07-20 Published:2026-05-21
  • Contact: Fei-ran ZHOU

Abstract:

China is a large producer and consumer of cotton and produces vast amounts of cotton by-products every year. However, anti-nutritional factors such as free gossypol seriously limit the use of cotton by-products as high-value feed. The problems with traditional physico-chemical detoxification methods include high cost, low efficiency, and potential pollution. Laccase, a polycopper oxidase with broad substrate specificity and strong oxidation activity, catalyzes the intramolecular cyclization of gossypol to convert toxic aldehyde groups into stable furan structures, thus achieving green degradation of gossypol. In this paper, the chemical properties of gossypol and its effects on liver toxicity, reproductive toxicity, and oxidative stress in animals are systematically reviewed. The three-dimensional structure of laccase, its copper cluster catalytic mechanism, and its mediator-assisted oxidation pathway are described. The regulatory effects of key factors such as pH, temperature, and enzyme concentration on degradation efficiency are summarized. Recent research has shown that laccase treatment can significantly alleviate liver injury and reproductive dysfunction induced by gossypol, and restore antioxidant enzyme activity. In addition, through natural strain screening, genetic engineering modification, and extreme environment microorganism development, the production efficiency and stability of laccase have been continuously improved, and its application in cottonseed meal detoxification has verified its industrialization potential. In the future, laccase technology is expected to promote the utilization of cotton by-products, reduce feed costs, and produce high value-added products, providing key technical support for the sustainable development of the cotton industry.

Key words: gossypol, laccase, detoxification, cotton by-products, feed