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<p>Biostimulants may be defined as substances or organisms that activate natural processes in plants to improve their nutrient absorption, stress resistance, and fruit quality. Marine plant waste materials like <i>Posidonia oceanica</i> (PO) in Tunisia, especially in tourist regions along its coasts, offer another unexploited source of plant-based biostimulants. These materials were found to have abundant compounds that stimulate plant growth in sustainable agricultural practices. The present study investigated the growth response of <i>Vicia faba</i> L. seedlings to PO extract using laboratory germination experiments with three different concentrations of PO extract (1%, 5%, and 10%) in three replicates each. The physicochemical composition of the extract, particularly macro-, micro-nutrients, and secondary metabolites, which can act as biostimulants, were analyzed. The results revealed that the PO extract was high in macro and micro-nutrients along with secondary metabolites and bio-active compound. The extract of <i>Posidonia oceanica</i> enhanced both germination and growth characteristics of <i>Vicia faba</i>. The highest impact on germination precocity was found when 1% of the extract was used, where there was an increment of 55.03% in comparison to the control, and the same effect became lesser with the increase of the extract concentration (39.49% at 5% and 33.36% at 10%). The same effect occurred for the mean germination time (MGT): it was decreased by 2.36 days when using 1% of the extract, by 0.77 days at 5%, and by 0.17 days at 10%. Overall, these findings indicate that <i>Posidonia oceanica</i> residues could serve as a potential ecofriendly biostimulant to enhance legume cultivation and promote environmentally sustainable agriculture.</p>

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From marine residue to crop growth: the effect of Posidonia oceanica liquid extract on Vicia faba growth parameters

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Marwa Melki,
  • Leila Chebil Ajjabi,
  • Leila Ktari,
  • Amal Boukteb,
  • Mariem Bouhadida

摘要

Biostimulants may be defined as substances or organisms that activate natural processes in plants to improve their nutrient absorption, stress resistance, and fruit quality. Marine plant waste materials like Posidonia oceanica (PO) in Tunisia, especially in tourist regions along its coasts, offer another unexploited source of plant-based biostimulants. These materials were found to have abundant compounds that stimulate plant growth in sustainable agricultural practices. The present study investigated the growth response of Vicia faba L. seedlings to PO extract using laboratory germination experiments with three different concentrations of PO extract (1%, 5%, and 10%) in three replicates each. The physicochemical composition of the extract, particularly macro-, micro-nutrients, and secondary metabolites, which can act as biostimulants, were analyzed. The results revealed that the PO extract was high in macro and micro-nutrients along with secondary metabolites and bio-active compound. The extract of Posidonia oceanica enhanced both germination and growth characteristics of Vicia faba. The highest impact on germination precocity was found when 1% of the extract was used, where there was an increment of 55.03% in comparison to the control, and the same effect became lesser with the increase of the extract concentration (39.49% at 5% and 33.36% at 10%). The same effect occurred for the mean germination time (MGT): it was decreased by 2.36 days when using 1% of the extract, by 0.77 days at 5%, and by 0.17 days at 10%. Overall, these findings indicate that Posidonia oceanica residues could serve as a potential ecofriendly biostimulant to enhance legume cultivation and promote environmentally sustainable agriculture.