Bioactive Compounds in Halophyte Plants
Summary
Halophyte plants, which thrive in saline and often hostile environments, have evolved specialised metabolic pathways to synthesise a rich array of bioactive compounds. These secondary metabolites include phenolic acids, flavonoids, alkaloids, saponins and terpenoids, each conferring adaptive advantages under salt stress. Phenolic and flavonoid compounds are particularly abundant and account for potent antioxidant and anti-inflammatory activities. Saponins and alkaloids have been shown to exhibit antimicrobial, cytotoxic and enzyme-modulating properties. Collectively, these molecules underpin diverse applications in pharmaceutical, nutraceutical, cosmetic and food industries. Salicornia, sea fennel (Crithmum maritimum) and Suaeda species, for example, yield caffeoylquinic acids and triterpenoid saponins with proven neuroprotective and cardioprotective effects. Advances in extraction technologies—such as gastrointestinal simulation, hydro-ethanolic fractionation and essential-oil distillation—have enhanced yields and bioaccessibility, facilitating the transformation of halophyte biomass into functional ingredients. The sustainable cultivation of halophytes in saline agriculture systems further underlines their global significance as resilient crops that can mitigate soil salinisation, support coastal economies and contribute to a circular bioeconomy.
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Bioactive Compounds in Halophyte Plants publication trend
The graph below shows the total number of articles in bioactive compounds in halophyte plants across all publications each year (not limited to Nature Index journals).
Technical terms
Halophyte: A plant adapted to grow in environments with high salt concentrations, often exhibiting specialised salt-tolerance mechanisms.
Phenolic acids: A class of aromatic compounds containing one or more hydroxyl groups attached to an aromatic ring, known for antioxidant properties.
Flavonoids: Polyphenolic molecules characterised by a 15-carbon skeleton, contributing to plant pigmentation and exhibiting anti-inflammatory and antioxidant activities.
Saponins: Glycosides with soap-like foaming properties, often displaying antimicrobial and cholesterol-modulating effects.
Bioaccessibility: The proportion of a compound that is released from its matrix in the gastrointestinal tract and thus available for absorption.
Antioxidant capacity: The ability of a substance to neutralise free radicals or inhibit oxidative processes.
References
- Unraveling the nutraceutical potential of Salicornia ramosissima by-product – impact of gastrointestinal digestion and intestinal permeability on in vitro bioactivity. Food Chemistry (2025).
- Unveiling the Antioxidant Potential of Halophyte Plants and Seaweeds for Health Applications. Oxygen (2024).
- Exploiting the Crithmum maritimum L. Aqueous Extracts and Essential Oil as Potential Preservatives in Food, Feed, Pharmaceutical and Cosmetic Industries. Antioxidants (2023).
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