Phenolic profile, antioxidant capacity of five Ziziphus spina-christi (L.) Willd provenances and their allelopathic effects on Trigonella foenum-graecum L. and Lens culinaris L. seeds.
The aim of this work was to evaluate some secondary metabolites, antioxidant activity of methanolic leaf extracts of five Ziziphus spina-christi provenances (INRGREF, Tozeur, Degueche, Nafta and Kebelli) and their allelopathic effects on Trigonella foenum-graecum and Lens culinaris. Leaves were collected during 2013 and 2014. Total phenols, flavonoids, tannins and antioxidant activity were evaluated using the Folin ciocalteux, Aluminum trichloride, vanillin and scavenging activity on 22-diphenyl-1-picrylhydrazyl (DPPH) radical methods, respectively. Total phenols, tannins and flavonoids were present, at levels of 57.41 mg GAE/g DW, 31.98 mg RE/g DW and 14.68 μg CE/g DW, respectively. The high antioxidant activity (0.086 μg/mL) was noted in kebelli provenance (2013). The highest germination, plumule and radicle lengths of tested species were observed in INRGREF provenance. Z. spina-christi leaf extracts may be suggested in foods and pharmaceutical industries. Leaf extracts could also provide a natural herbicide with a positive impact on the environment.
a Laboratory of Management and Forest Valorization , Institut National des Recherches en Génie Rural, Eaux et Forêts (INRGREF) , Ariana , Tunisie.
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Elaloui
a Laboratory of Management and Forest Valorization , Institut National des Recherches en Génie Rural, Eaux et Forêts (INRGREF) , Ariana , Tunisie.
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Ghazghazi
a Laboratory of Management and Forest Valorization , Institut National des Recherches en Génie Rural, Eaux et Forêts (INRGREF) , Ariana , Tunisie.
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Ennajah
b Facultés des Sciences de , Tunis Campus Universitaire , Tunis , Tunisie.
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Manaa
b Facultés des Sciences de , Tunis Campus Universitaire , Tunis , Tunisie.
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Guezmir
b Facultés des Sciences de , Tunis Campus Universitaire , Tunis , Tunisie.
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Karray
a Laboratory of Management and Forest Valorization , Institut National des Recherches en Génie Rural, Eaux et Forêts (INRGREF) , Ariana , Tunisie.
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Laamouri
D064089:Allelopathy; D000975:Antioxidants / Q000494:pharmacology*; D005419:Flavonoids / Q000032:analysis; D018525:Germination / Q000187:drug effects; D027806:Lens Plant / Q000187:drug effects*; D010636:Phenols / Q000032:analysis*; D010936:Plant Extracts / Q000032:analysis / Q000494:pharmacology; D018515:Plant Leaves / Q000737:chemistry; D012639:Seeds / Q000737:chemistry; D013634:Tannins / Q000032:analysis; D029910:Trigonella / Q000187:drug effects*; D031957:Ziziphus / Q000737:chemistry*
D000975:Antioxidants; D005419:Flavonoids; D010636:Phenols; D010936:Plant Extracts; D013634:Tannins
Secondary metabolites; Ziziphus spina-christi; allelopathic effects; antioxidant activity; provenance