Browsing by Author "S. Hamli"

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    DETERMINATION OF PHENOLIC COMPOUNDS AND ANTIOXIDANT ACTIVITY OF WHITE HENBANE (HYOSCYAMUS ALBUS L.) PLANT TREATED BY KINETIN (K)AND 2,4-DICHLOROPHENOXYACETIC ACID (2,4-D) IN MILA, ALGERIA
    (Journal of Fundamental and Applied Sciences, 2018-09-01) Kenza Kadi; D. Dib; S. Hamli; D. Addad
    The present work deals with the evaluation of the antioxidant activity of the extracts of the white henbane (Hyoscyamus albus L.) of the solanaceae family, treated with phytohormones 2,4-Dichlorophenoxyacetic acid (2, 4-D) andKinetin (K)in doses 0, 10,20mg / l), widely used in traditional medicine and very rich in alkaloids. Preliminary phytochemical screening showed that treatment with phytohormones had no effect on the quality of the secondary metabolites. The results of the phytochemical study of the plant showed that the treatment with 2,4-D and K had a significant effect by reduction compared to the untreated plant on the phenolic compounds studied. The evaluation of the antioxidant activity in vitro was investigated by the DPPH trapping method and showed that the treatment with 2,4-D and K had a significant effect on the antioxidant activity so all the extracts of the various treatments of H. albus can act as radical scavengers.
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    INVOLVEMENT OF ABIOTIC STRESS TOLERANCE MECHANISMS IN BIOTIC STRESS TOLERANCE IN DURUM WHEAT
    (Journal of Fundamental and Applied Sciences, 2020) Kenza Kadi; S. Hamli; D. Addad
    The objective of our study is to implicate the mechanisms of tolerance to abiotic stress by the synthesis of metabolites in tolerance to biotic stress. The extracted metabolites; proline, sugars and polyphenols from durum wheat seedlings subjected to heat shock (40 °C), used to test antifungal activity on two fungal strains, powdery mildew and penicillium, under controlled conditions. The boussellam variety is more tolerant of applied stress than the Ciccio and Vitron varieties. The concentration of the three osmolytes varies from one variety to another; it increases in genotypes stressed compared to controls. Antifungal activity results in the appearance of an inhibition zone around the disc impregnated with the studied extract. Sugars have proven to be a highly effective antifungal agent compared to proline and polyphenols with maximum values (28,33 ± 2 mm) in oidium and (29 ± 1 mm) in penicillium.