Essential Oil Composition and Biological Activity in Curcuma Species
Summary
The genus Curcuma, encompassing key species such as Curcuma longa, Curcuma aromatica, Curcuma caesia and Curcuma amada, yields a rich array of essential oils predominantly from rhizomes and, increasingly, from foliage. These oils are complex mixtures of sesquiterpenes (for example ar-turmerone, α-turmerone, β-elemene, curdione and curcumene) and monoterpenes (notably 1,8-cineole, α-phellandrene and limonene). Composition varies with species, genotype, geographic origin, plant part and extraction technique, giving rise to distinct chemotypes. Biological activities are broad and include antimicrobial effects against bacteria and fungi, antioxidative potential in radical-scavenging assays, anti-inflammatory properties linked to modulation of cytokines and enzymes, cytotoxic or chemopreventive actions in cancer cell lines, and modulation of carbohydrate-metabolising enzymes relevant to anti-diabetic applications. Synergistic interactions among volatile constituents often enhance efficacy. Recent work has highlighted leaf oils as valorisation of agrowaste, revealing potent free-radical scavenging, broad-spectrum antibacterial activity and selective cytotoxicity against tumour cells. In silico studies further map interactions between major phytocompounds and protein targets, underpinning observed bioactivities. Global interest spans pharmaceutical development, functional foods, cosmetics and sustainable agriculture, reflecting the therapeutic promise and commercial value of Curcuma essential oils.
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Essential Oil Composition and Biological Activity in Curcuma Species publication trend
The graph below shows the total number of articles in essential oil composition and biological activity in curcuma species across all publications each year (not limited to Nature Index journals).
Technical terms
Essential oil: A concentrated mixture of volatile plant metabolites, chiefly terpenes and phenolics, obtained by distillation or solvent extraction.
Gas chromatography–mass spectrometry (GC-MS): An analytical technique for separating, detecting and identifying volatile organic compounds.
Sesquiterpene: A class of terpenes composed of three isoprene units (C15) often responsible for aromatic and bioactive properties of plant oils.
Monoterpene: A class of terpenes composed of two isoprene units (C10), commonly contributing to fragrance and therapeutic effects.
IC₅₀: The concentration of a substance required to inhibit a given biological or biochemical function by 50%.
Minimum inhibitory concentration (MIC): The lowest concentration of an antimicrobial agent that prevents visible growth of a microorganism.
References
- Chemical Composition and Biological Activities of the Leaf Essential Oils of Curcuma longa, Curcuma aromatica and Curcuma angustifolia. Antibiotics (2022).
- A Comprehensive Review with Future Prospects on the Medicinal Properties and Biological Activities of Curcuma caesia Roxb.. Evidence-based Complementary and Alternative Medicine (2023).
- Evaluation of the Antifungal, Antioxidant, and Anti-Diabetic Potential of the Essential Oil of Curcuma longa Leaves from the North-Western Himalayas by In Vitro and In Silico Analysis. Molecules (2022).
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