Unveiling the bioactivity ofAllium triquetrumL. lipophilic fractions: chemical characterization andin vitroantibacterial activity against methicillin-resistantStaphylococcus aureus


The lipophilic composition ofAllium triquetrumL. bulbs, flowers and leaves was studied for the first time by GC-MS. Sixty compounds were firstly identified inA. triquetrumL. Fatty acids represented the major lipophilic family among the studied extracts, with (9Z,12Z,15Z)-octadeca-9,12,15-trienoic and (9Z,12Z)-octadeca-9,12-dienoic acids being the major constituents of this family. A long chain aliphatic ketone, namely hentriacontan-16-one, was mainly found in flowers and leaves. Flowers and leaves were also found to be rich in long chain aliphatic alkanes and alcohols, respectively. Sterols, monoglycerides, aromatic compounds and long chain aliphatic aldehydes were found in lower amounts. The antibacterial activity ofA. triquetrumbulb, flower and leaf extracts against methicillin-resistantStaphylococcus aureus(MRSA) growth wasin vitroassessed. Bulb and flower extracts showed significant MRSA growth inhibition. Overall, these valuable findings can contribute to the valorization ofA. triquetrumL. as a source of value-added phytochemicals, specifically as antibacterial agents and for nutraceutical applications.



subject category

Biochemistry & Molecular Biology; Food Science & Technology


Rabah, S; Kouachi, K; Ramos, PAB; Gomes, AP; Almeida, A; Haddadi-Guemghar, H; Madani, K; Silvestre, AJD; Santos, SAO

our authors


The authors thank FCT/MEC for the financial support to CICECO - Aveiro Institute of Materials (UIDB/50011/2020 and UIDP/50011/2020) and LAQV-REQUIMTE (UIDB/50006/2020), and when appropriate the co-financing support by FEDER, under the PT2020 Partnership Agreement. Acknowledgments are also due to CESAM (UID/AMB/50017/2019), through national funds. Patricia A. B. Ramos, Ana T. P. C. Gomes and Sonia A. O. Santos thank the project AgroForWealth: Biorefining of agricultural and forest by-products and wastes: integrated strategic for valorization of resources towards society wealth and sustainability (CENTRO-01-0145-FEDER-000001), for the post-doctoral grant and the contracts, respectively. The authors also thank the Ministry of Higher Education and Scientific Research of Algeria.

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