Scholarlink

<p>The in vitro culture of medicinal plants provides a controlled platform for the targeted enhancement of valuable secondary metabolites. This study aimed to investigate, using an in vitro culture system, the interactive effects of spectral light quality (blue, red, white) and titanium dioxide nanoparticles (TiO₂ NPs; 0, 25, 50, 75, and 100&#xa0;mg L⁻¹) on the growth and metabolism of <i>Matricaria chamomilla</i> L. cultivated in a controlled in vitro system. A pronounced synergistic effect was specifically identified between blue light and an optimal TiO₂ NP concentration of 50&#xa0;mg L⁻¹. This combined treatment exhibited a strong synergistic effect, significantly enhancing both shoot and root biomass (by 86% and 55%, respectively, compared to blue light control) while increasing the accumulation of chlorophylls and carotenoids, indicating improved photosynthetic efficiency. Critically, at the biochemical level, it triggered a primed and highly efficient antioxidant response. The coordinated upregulation of key enzymatic antioxidants effectively mitigated oxidative stress, as evidenced by a 63% reduction in malondialdehyde content. The effective management of oxidative pressure facilitated a metabolic reallocation, redirecting carbon flux into secondary metabolic pathways. Consequently, the biosynthesis of valuable phenolic compounds was substantially elevated: total phenolic and flavonoid contents increased by 1.6-fold and 1.9-fold, respectively, resulting in a significant boost in radical scavenging activity to 85.5%. Crucially, this marked improvement in bioactive compound yield was achieved without any growth penalty, effectively overcoming the typical growth-defense trade-off. The results demonstrate that blue light modulates plant physiology, productively harnessing TiO₂ NPs as elicitors. Consequently, this light-modulated nano-elicitation strategy offers a sustainable and efficient platform for enhancing the nutraceutical quality of high-value medicinal plants, with direct implications for the functional food and herbal industries.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Blue light and titanium dioxide nanoparticles synergistically enhance antioxidant phenolics in Matricaria chamomilla L. in vitro cultures

  • 期刊论文

  • 发表日期：

    2026年2月23日

查看全文
  • Mahin Pouresmaeil,
  • Younes Pourbeyrami-e-Hir,
  • Esmaeil Chamani,
  • Hassan Maleki Lajayer

摘要

The in vitro culture of medicinal plants provides a controlled platform for the targeted enhancement of valuable secondary metabolites. This study aimed to investigate, using an in vitro culture system, the interactive effects of spectral light quality (blue, red, white) and titanium dioxide nanoparticles (TiO₂ NPs; 0, 25, 50, 75, and 100 mg L⁻¹) on the growth and metabolism of Matricaria chamomilla L. cultivated in a controlled in vitro system. A pronounced synergistic effect was specifically identified between blue light and an optimal TiO₂ NP concentration of 50 mg L⁻¹. This combined treatment exhibited a strong synergistic effect, significantly enhancing both shoot and root biomass (by 86% and 55%, respectively, compared to blue light control) while increasing the accumulation of chlorophylls and carotenoids, indicating improved photosynthetic efficiency. Critically, at the biochemical level, it triggered a primed and highly efficient antioxidant response. The coordinated upregulation of key enzymatic antioxidants effectively mitigated oxidative stress, as evidenced by a 63% reduction in malondialdehyde content. The effective management of oxidative pressure facilitated a metabolic reallocation, redirecting carbon flux into secondary metabolic pathways. Consequently, the biosynthesis of valuable phenolic compounds was substantially elevated: total phenolic and flavonoid contents increased by 1.6-fold and 1.9-fold, respectively, resulting in a significant boost in radical scavenging activity to 85.5%. Crucially, this marked improvement in bioactive compound yield was achieved without any growth penalty, effectively overcoming the typical growth-defense trade-off. The results demonstrate that blue light modulates plant physiology, productively harnessing TiO₂ NPs as elicitors. Consequently, this light-modulated nano-elicitation strategy offers a sustainable and efficient platform for enhancing the nutraceutical quality of high-value medicinal plants, with direct implications for the functional food and herbal industries.