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Abstract <p>Cultivation of <i>Dendrobium nobile</i> Lindl, a highly valued herb, has long been faced many challenges that needed to be overcome to ensure the quality improvement and pest management, which is vital for industrial development. The experiment was conducted to investigate the growth physiology and secondary metabolite accumulation of <i>D. nobile</i>. It was treated with different concentrations of Fenaminosulf (0.5, 0.1, 0.05, 0.025, 0.0125%). Clear water was used as the control. The measurement of morphological indices, photosynthetic pigments, antioxidant enzyme activities, osmoregulatory substances, and medicinal constituent contents were conducted on days 7, 14, 21, 28, and 35 after treatment. The results testified to the concentration-dependent effect of Fenaminosulf against <i>D. nobile</i>. Treatment at 0.0125% maximally stimulated morphological growth, while treatment at 0.1%, causing minor stress, maximally stimulated the secondary metabolite production. The content of polysaccharides, polyphenols, flavonoids, and alkaloids all reached the maximum on the 21st day. An antioxidant enzyme system such as superoxide dismutase, peroxidase, and catalase (CAT) was the most active in the group treated with 0.05%, where the activity of CAT increased by 53% over the control. Among them, the impact of stress caused by the high-level treatment with 0.5% was the most serious: the content of malondialdehyde increased by 44%, chlorophyll formation was inhibited, and metabolic disorders happened. Principal component analysis indicated that 0.1% Fenaminosulf treatment yielded the largest overall score. The findings provide a foundation for further research and direct controlled cultivation and <i>D. nobile</i> quality enhancement strategies.</p>

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Modulating Growth Physiology and Metabolite Accumulation in Dendrobium nobile Lindl with Fenaminosulf

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • X. Huang,
  • Y. Fan,
  • Y. Huang,
  • Y. Zhang,
  • C. Lin,
  • J. Xiao,
  • A. Luo

摘要

Abstract

Cultivation of Dendrobium nobile Lindl, a highly valued herb, has long been faced many challenges that needed to be overcome to ensure the quality improvement and pest management, which is vital for industrial development. The experiment was conducted to investigate the growth physiology and secondary metabolite accumulation of D. nobile. It was treated with different concentrations of Fenaminosulf (0.5, 0.1, 0.05, 0.025, 0.0125%). Clear water was used as the control. The measurement of morphological indices, photosynthetic pigments, antioxidant enzyme activities, osmoregulatory substances, and medicinal constituent contents were conducted on days 7, 14, 21, 28, and 35 after treatment. The results testified to the concentration-dependent effect of Fenaminosulf against D. nobile. Treatment at 0.0125% maximally stimulated morphological growth, while treatment at 0.1%, causing minor stress, maximally stimulated the secondary metabolite production. The content of polysaccharides, polyphenols, flavonoids, and alkaloids all reached the maximum on the 21st day. An antioxidant enzyme system such as superoxide dismutase, peroxidase, and catalase (CAT) was the most active in the group treated with 0.05%, where the activity of CAT increased by 53% over the control. Among them, the impact of stress caused by the high-level treatment with 0.5% was the most serious: the content of malondialdehyde increased by 44%, chlorophyll formation was inhibited, and metabolic disorders happened. Principal component analysis indicated that 0.1% Fenaminosulf treatment yielded the largest overall score. The findings provide a foundation for further research and direct controlled cultivation and D. nobile quality enhancement strategies.