Dietary Sodium Butyrate Supplementation Enhances Silkworm Silk Yield by Simultaneously Promoting Larval Growth and Silk Gland Development

文献类型： 外文期刊

第一作者： Ren, Xiaoxiao

作者： Ren, Xiaoxiao;Ye, Zhanfeng;Qing, Zhuo;Yang, Wanjun;Luo, Chaobin;Xing, Dan;He, Xingjiang

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关键词： silkworm; sodium butyrate; silk yield; body growth; silk gland development

期刊名称：INSECTS （ 影响因子：2.9； 五年影响因子：3.3 ）

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年卷期： 2025 年 16 卷 8 期

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收录情况： SCI

摘要： Silk yield enhancement in sericulture has plateaued. Sodium butyrate (NaB) is known to improve production performance in livestock and poultry, yet its effects on silkworm silk yield remain uncharacterized. Here, we evaluated the impact of dietary NaB supplementation on silkworm growth, silk gland development, and cocoon output. Mulberry leaves were immersed in NaB solutions at concentrations of 0, 2.5, 5, 10, 20, 40, or 80 mM, and subsequently provided as feed to third- to fifth-instar larvae. Among these, 10 mM NaB treatment most effectively promoted larval and pupal weight gain and increased food intake. Phenotypic and economic trait analyses revealed that 10 mM NaB treatment significantly enlarged the silk gland and boosted overall silk yield. Mechanistically, NaB enhanced body growth by increasing feeding intake and influencing the juvenile hormone and ecdysteroid signaling pathways; moreover, it promoted DNA replication in silk gland cells, thereby influencing silk gland development. Taken together, our findings demonstrate that dietary supplementation with an appropriate concentration of NaB concurrently enhances body growth and silk gland development, leading to higher silk production, and underscore the potential of short-chain fatty acid salts in advancing sericulture.

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