Phytochemical profile and allelopathic potential of Haloxylon scoparium Pomel (Chenopodiaceae) from Algerian Sahara | Fitokemični profil in alelopatski potencial vrste Haloxylon scoparium Pomel (Chenopodiaceae) iz alžirske Sahare

Inglés. The aim of the present work is to study the chemical composition, to estimate the phenolic compounds content and to evaluate the potential allelopathic effects of the Haloxylon scoparium Pomel. Phytochemical tests revealed that Haloxylon scoparium contains tannins, saponins, coumarins, alkaloids, flavonoids and steroids. Furthermore, it contains high levels of total phenolic (588.33 mg GAE 100 g-1) and flavonoids (95.45 mg QE 100 g-1) contents. Moreover, LC-MS-MS analysis allowed us to determine their chemical composition. The results of this characterization confirm the presence of vanillin, naringenin, folic acid, maleic acid, benzoic acid, myricetin, qwuercetin, beta-carotene, butylhydroxyanisole (BHA), butylated hydroxytoluene (BHT), rutin, cafeic acid, hydroxy-4-coumarine, ascorbic acid, and gallic acid. The allelopathic effect was studied on seed germination and seedling growth of four weed species. The bioassays were performed using different concentrations (1 %, 2.5 %, 5 % and 10 %) against a negative control. The seed germination, shoot and root length of weed species were completely inhibited at the highest concentrations (10 %, 5 %). However, the lower concentrations exhibited lesser inhibition percentages on the germination and the seedling growth. The phytochemical results and the significant allelopathic effects of the plant extract suggest that this species may offer new substances for the biocontrol of weeds.

Esloveno. Namen raziskave je preučiti kemijsko sestavo in vsebnost fenolnih spojin za ovrednotenje alelopatskega potenciala vrste Haloxylon scoparium Pomel. V raziskavi je bilo ugotovljeno, da vrsta vsebuje različne tanine, saponine, kumarine, flavonoide, alkaloide in steroide. Vsebuje velike količine celokupnih fenolov (588,33 mg GAE 100 g-1) in flavonoidov (95,45 mgQE 100 g-1). Podrobnejša kemijska LC-MS-MS analiza je pokazala prisotnost vanilina, naringenina, folne, jabolčne in benzoične kisline, mircetina, kvercetina, beta-karotena, butil hidroksianizola (BHA), butiliranega hidroksitoluena (BHT), rutina, kavne kisline, hidroksi-4-kumarina, askorbinske in galne kisline. Alelopatski učinek je bil preučevan na kalitvi in rasti kalic štirih vrst plevelov. Preizkušene so bile različne koncentracije alelopatskih snovi (1 %; 2,5 %, 5 % in 10 %) napram kontroli. Kalitev semen in dolžinska rast korenin in poganjkov plevelov je bila popolnoma zavrta pri največjih koncentracijah alelopatskih snovi (10 %, 5 %). Manjše koncentracije alelopatskih snovi so pokazale manjši odstotek zaviranja kalitve in rasti sejank plevelov. Alelopatski učinek izvlečkov te rastline nakazuje, da bi ta rastlina lahko bila vir novih učinkovin pri biokontroli plevelov.