ArticleApplied biochemistry and biotechnology2026
Seaweed Extract Foliar Application on Growth, Biochemical Traits, and Stilbene Production in Peanut Shoot-Derived Genotypes: A Sustainable Approach.
Article in Applied biochemistry and biotechnology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The limited natural occurrence of stilbenes, a valuable compound, in sources such as peanuts restricts their full exploitation for health benefits. To address this challenge, we explored the novel use of Sargassum vulgare liquid extract (SLE) as a biostimulant to enhance stilbene production in peanut plants shoots. While seaweed extracts have been previously studied for general crop improvement, this work uniquely demonstrates a genotype-specific and concentration-dependent enhancement of piceatannol levels. Three peanut cultivars: 'Trabelsia' (AraT), 'Chanfakhi' (AraC), and 'American' (AraA) treated with six foliar SLE concentrations (0%, 0.5%, 1%, 2%, 4%, 8%) weekly for 7 weeks, starting 21 days after germination. Significant improvements (p < 0.05) in plant growth, pigment content, and yield were observed, with the highest biomass in AraT at 8% SLE and the highest pod production in AraC and AraA at 1-2%. Polyphenol and flavonoid content peaked under SLE at 8% AraC and 1%, respectively. Most notably, piceatannol content in AraA increased threefold (30.11 ± 2.6 µg/g DW) with 8% SLE, while resveratrol and piceid levels showed limited changes across treatments. These findings highlight the innovative use of S. vulgare extract as a sustainable elicitor for targeted piceatannol enrichment in peanut byproducts, opening avenues for their valorisation in nutraceutical or pharmaceutical applications.
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