Degradation of gossypol and improvement of nutritional components in defatted cottonseed meal through fermentation by a synthetic microbial community.

Authors

Zhanqiang Yan, Xiaolong Ma, Yibei Wan, Lei Shi, Ying Zhang, Ivan Mijakovic, Lingbo Qu, Yongjun Wei

Published in

Food microbiology. Volume 142. Pages 105284. Epub Aug 25, 2026.

Abstract

Certain microbes can enhance the utilization and nutritional value of defatted cottonseed meal, an oilseed processing by-product. In this study, 11 microbial strains with strong gossypol-degrading activity were identified. The interactions among these 11 gossypol-resistant strains were examined using supernatant cross-feeding assays. Based on these interactions, 28 synthetic microbial communities (SynComs) were constructed. Evaluation of the fermentation performance of these SynComs revealed four core functional strains of YZ-1 (Pichia kudriavzevii LNTJQ-1), YZ-3 (Wickerhamomyces anomalus YJQ-1), YZ-6 (Candida tropicalis TJQ-4), and YZ-7 (Saccharomyces cerevisiae LNTJQ-3). Among the tested SynComs, SC5 (composed of YZ-1, YZ-3, and YZ-7) was identified as the optimal consortium. SC5 degraded free gossypol by 93.82 % (Reducing from 1068.00 mg/kg to 66.00 mg/kg), while increasing crude protein content by 11.08 % and total amino acid content by 7.98 % based on dry matter. In summary, the screening of gossypol degradation microbes and construction of SynComs improved the nutritional value and utilization of defatted cottonseed meal, providing a feasible solution for developing defatted cottonseed meal as an animal feed resource.

PMID:
42901645
Bibliographic data and abstract were imported from PubMed on 21 Oct 2026.

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