Etude de polyphénols des feuilles d’une endémique ibéro marocaine, Thymelaea lythroides.

Abstract

RÉSUMÉ: Etude de polyphénols des feuilles d’une endémique ibéro marocaine, Thymelaea lythroides. Thymelaea lythroides (Thyméléacées) est une endémique ibéro marocaine, largement répandue dans la région du Gharb (forêt de Mamora). Elle fait partie de la panoplie des plantes médicinales et aromatiques du Maroc. En raison du manque d’informations phytochimiques sur l’espèce, des études antérieures ont eu pour objet une recherche de l’activité antifongique de ses extraits et un screening phytochimique. Ce dernier a permis de mettre en évidence la richesse de la plante en différents métabolites secondaires. Aussi, le présent travail se propose d’étudier les polyphénols des feuilles de Thymelaea lythroides et spécialement les aglycones flavoniques et les anthocyanidines. L’étude a démontré l’existence de différentes molécules appartenant à la classe des flavonols, dont le kaempférol, et la quercétine, en plus de deux acides phénols, identifiés comme l’acide caféique et l’acide genticique et deux anthocyanidines : la delphinidine et la cyanidine.Mots clés. Thymelaea lythroides, Thyméléacées, Mamora, polyphénols.ABSTRACT. Study of polyphenols of the leaves of an ibero moroccan endemic, Thymelaea lythroides. Thymelaea lythroides (Thymelaeacees) is an endemic of the region of the Gharb (forest of Mamora). It is part of the panoply of the medicinal and aromatic plants of Morocco. Because of the lack of phytochemical informations on the species, some previous studies had for object a research of the antifungal activity of its extracts and a phytochemical screening. This last permitted to put in evidence the wealth of the plant in different secondary compounds. Thus, the present work intends to study the polyphenols of the leaves of Thymelaea lythroides and specially the flavonics aglycones and the anthocyanidins. The survey demonstrated the existence of different molecules belonging to the class of the flavonols, whose identification revealed the kaempferol and quercetine. In addition to two acidic phenols, identified as the cofeique acid and the genticique acidic and two anthocyanidins, the delphinidine and the cyanidine.Key words. Thymelaea lythroides, Thymelaeacees, Mamora, polyphenols.

Toxicological evaluation of <em>Thymelaea hirsuta</em> and protective effect against CCl₄-induced hepatic injury in rats

“…From analysis, we confirmed that the aqueous extract of T. Hirsuta collected in Morroco was also rich in flavonoids, alkaloids, sterols, caumaris and tannins, and there was no saponins and free quinonoids (Table 1) like described in other studies (Djeridane et al, 2005;Dohou et al, 2004;El-Beheiry et al, 2000;Garcia-Granadoset al, 1980).…”

Influence of Phenolic Compounds on Antioxidant and Anticorrosion Activities of Ammi visnaga Extracts Obtained Ultrasonically in Three Solvent Systems

“…The qualitative phytochemistry of the dry extract was achieved by colorimetric reactions and precipitation by specific chemical reagents according to the protocols given in the literature [24][25][26]. These tests revealed the presence of a number of compound groups of the three extracts.…”

Anti-inflammatory potential of Capparis spinosa L. in vivo in mice through inhibition of cell infiltration and cytokine gene expression

“…4c , d , e ). These features are recognized as the microscopic hallmark of contact dermatitis [ 28 ]. Interestingly, our study demonstrated that this DNFB-induced features of inflammation were also suppressed upon CS treatment, as shown in Fig.…”

“…The methanol extract was subjected to phytochemical analysis for constituent identification using the phytochemical methods, which were previously described [ 28 ]. In general, tests for the presence or absence of phytochemical compounds involved the addition of an appropriate chemical agent to the preparation in a test tube.…”