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<p>The domestication of <i>Bombyx mori</i>, commonly known as the silkworm, spans thousands of years, primarily in regions such as China and India, where its silk production is highly esteemed for its smooth texture and lustrous appearance. This study investigates the impact of feeding silkworms a diet of mulberry leaves enriched with a mixture of exogenous fatty acids on their fatty acid metabolism and economic traits. The results reveal that incorporating exogenous fatty acids into the silkworm diet significantly increased haemolymph and fat body lipid levels, surpassing those observed in silkworms fed untreated mulberry leaves. While the fatty acid profile of the silkworm tissues closely mirrored that of the mulberry leaves, notable changes were observed in specific fatty acid levels. Saturated fatty acids (C16:0 and C18:0) were slightly higher in larvae fed untreated leaves, whereas unsaturated fatty acids (C18:2 and C18:3) were more abundant in larvae consuming treated leaves. Additionally, gamma-linolenic acid (C18:3, n-6) was absorbed into the larval haemolymph and integrated into the total lipids of the fat body. This fatty acid, along with other essential fatty acids, exhibited an extended residence within the midgut before being continuously released into the haemolymph. Notably, the absorption of C18:3 (n-6) did not interfere with the assimilation of linolenic acid (C18:3, n-3), and the proportions of both C18:3, n-3 and C18:2 were relatively higher in the haemolymph and fat body of silkworms fed mulberry leaves enriched with exogenous fatty acids. This finding suggests that exogenous fatty acids actively contribute to silk biosynthesis, as well as the development of oocytes and embryos in silkworms. Therefore, supplementing silkworm diets with exogenous fatty acids has a substantial impact on fatty acid metabolism and economic characteristics. These findings illuminate the potential for optimizing silkworm rearing practices to enhance silk production and quality while ensuring the sustainability of this ancient and revered tradition.</p>

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Enhancement of silk production and quality in Bombyx mori L. through dietary supplementation with exogenous fatty acids

  • 期刊论文

  • 发表日期：

    2025年3月26日

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  • Firdose Ahmad Malik,
  • Mudasir Ahmad Mir,
  • Shabir Ahmad Bhat,
  • Awquib Sabhat,
  • Vivak M. Arya,
  • Zhihang Zhuo,
  • Habib Ali,
  • Abdullah A. Alarfaj,
  • Sulaiman Ali Alharbi

摘要

The domestication of Bombyx mori, commonly known as the silkworm, spans thousands of years, primarily in regions such as China and India, where its silk production is highly esteemed for its smooth texture and lustrous appearance. This study investigates the impact of feeding silkworms a diet of mulberry leaves enriched with a mixture of exogenous fatty acids on their fatty acid metabolism and economic traits. The results reveal that incorporating exogenous fatty acids into the silkworm diet significantly increased haemolymph and fat body lipid levels, surpassing those observed in silkworms fed untreated mulberry leaves. While the fatty acid profile of the silkworm tissues closely mirrored that of the mulberry leaves, notable changes were observed in specific fatty acid levels. Saturated fatty acids (C16:0 and C18:0) were slightly higher in larvae fed untreated leaves, whereas unsaturated fatty acids (C18:2 and C18:3) were more abundant in larvae consuming treated leaves. Additionally, gamma-linolenic acid (C18:3, n-6) was absorbed into the larval haemolymph and integrated into the total lipids of the fat body. This fatty acid, along with other essential fatty acids, exhibited an extended residence within the midgut before being continuously released into the haemolymph. Notably, the absorption of C18:3 (n-6) did not interfere with the assimilation of linolenic acid (C18:3, n-3), and the proportions of both C18:3, n-3 and C18:2 were relatively higher in the haemolymph and fat body of silkworms fed mulberry leaves enriched with exogenous fatty acids. This finding suggests that exogenous fatty acids actively contribute to silk biosynthesis, as well as the development of oocytes and embryos in silkworms. Therefore, supplementing silkworm diets with exogenous fatty acids has a substantial impact on fatty acid metabolism and economic characteristics. These findings illuminate the potential for optimizing silkworm rearing practices to enhance silk production and quality while ensuring the sustainability of this ancient and revered tradition.