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Abstract <p><i>Stachytarpheta jamaicensis</i> (L.) Vahl, an invasive weed species, is well recognized for its rich phytochemical profile, comprising flavonoids, phenolics, alkaloids, and terpenoids. This study investigates its potential as a natural biostimulant to enhance physiological, biochemical, and agronomic traits in soybean (<i>Glycine max</i> L.). <i>S. jamaicensis</i> extract (SjE) at concentrations of 10% and 25% were applied via soil drenching. The 10% SjE treatment significantly improved plant morphological attributes, including the number of leaves, shoot length, shoot fresh weight, root number, root length, and root fresh weight, compared to both the control and 25% SjE treatments. Photosynthetic pigment analysis revealed a 1.16-fold increase in chlorophyll <i>a</i>, 1.25-fold in chlorophyll <i>b</i>, and a 1.21-fold rise in total chlorophyll and carotenoids (1.1-fold), indicating enhanced photosynthetic performance. Biochemical analyses further demonstrated significant increases in antioxidant enzyme activities superoxide dismutase (2.02-fold), catalase (1.66-fold) and total phenolic content (1.68-fold), suggesting improved oxidative stress tolerance. These findings confirm that <i>S. jamaicensis</i> extract is an effective and sustainable biostimulant that can replace conventional chemical-based growth enhancers. Moreover, the repurposing of an invasive weed for agricultural benefit underscores a circular bioeconomy approach, aligning with sustainable and eco-friendly farming strategies. This study highlights the potential of <i>S.&#xa0;jamaicensis</i> in improving crop productivity and resilience through natural elicitor-based mechanisms.</p>

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Valorization of the Invasive Weed Stachytarpheta jamaicensis (L.) Vahl: Growth-Promoting Effects on Soybean (Glycine max L.)

  • 期刊论文

  • 发表日期：

    2026年3月18日

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  • G. Punithavathi,
  • K. Saravanan,
  • S. Dhanapal,
  • G. Chelladurai,
  • C. Appunu,
  • N. Senthilkumar,
  • N. Kiruthiga,
  • K. Anbarasu

摘要

Abstract

Stachytarpheta jamaicensis (L.) Vahl, an invasive weed species, is well recognized for its rich phytochemical profile, comprising flavonoids, phenolics, alkaloids, and terpenoids. This study investigates its potential as a natural biostimulant to enhance physiological, biochemical, and agronomic traits in soybean (Glycine max L.). S. jamaicensis extract (SjE) at concentrations of 10% and 25% were applied via soil drenching. The 10% SjE treatment significantly improved plant morphological attributes, including the number of leaves, shoot length, shoot fresh weight, root number, root length, and root fresh weight, compared to both the control and 25% SjE treatments. Photosynthetic pigment analysis revealed a 1.16-fold increase in chlorophyll a, 1.25-fold in chlorophyll b, and a 1.21-fold rise in total chlorophyll and carotenoids (1.1-fold), indicating enhanced photosynthetic performance. Biochemical analyses further demonstrated significant increases in antioxidant enzyme activities superoxide dismutase (2.02-fold), catalase (1.66-fold) and total phenolic content (1.68-fold), suggesting improved oxidative stress tolerance. These findings confirm that S. jamaicensis extract is an effective and sustainable biostimulant that can replace conventional chemical-based growth enhancers. Moreover, the repurposing of an invasive weed for agricultural benefit underscores a circular bioeconomy approach, aligning with sustainable and eco-friendly farming strategies. This study highlights the potential of S. jamaicensis in improving crop productivity and resilience through natural elicitor-based mechanisms.