Browsing by Author "Chefrour, A"

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    La flore endémique du Nord-Est algérien face à la menace des espèces envahissantes
    (2020-07-17) Sakhraoui, N; Boussouak, R; Metallaoui, S; Chefrour, A; Hadef, A.
    The endemic flora of Northeastern Algeria facing the threat of invasive plants. We established for the first time for the Skikda region, the lists (updated list and list of taxa to research) of endemic flora and naturalized species considered invasive in the Mediterranean, representing a potential threat to this flora, by conducting surveys at the level of twelve communes. This led to the identification of 64 endemic taxa more than half of which are in the updated list (38 taxa). These plants belong to 26 families, 46 genera and are divided into 50 species, 11 subspecies and 3 varieties. The Algerian-Tunisian endemics are the most abundant (30 taxa). 11 invasive species in the Mediterranean are naturalized in our region, 5 of which colonize natural environments particularly rich in endemic species. Acacia saligna, Carpobrotus edulis and Opuntia ficus-indica are the main threatening species of this biological richness
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    Naturalisation de Melia azedarach (Meliaceae) et premier signalement de Canna indica(Cannaceae) et Pelargonium zonale(Geraniaceae) en Algérie
    (2019-12-03) Sakhraoui, N; Chefrour, A; S. Metallaoui; Metallaoui, S.
    this contribution, we report the naturalization of Melia azedarach and the discovery ofCanna indica and Pelargonium zonale growing outside the usual cultivation sites, making thiswork the first report of these species in Algeria. Some species must be monitored because theyare invasive in the Mediterranean area.Key words: alien flora, xenophytes, mode of reproduction, invasive character, Algeria
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    Pyrrolizidine Alkaloids in Some Algerian’s Honeys
    (2019-03-28) Draiaia, R; Borin, A; Martinello, M; Gallina, A; Mutinelli, F; Chefrour, A
    In this research, some Algerian honey samples were collected from various geographical and botanical origins, and analyzed by LC/MS method for determination of pyrrolyzidine alkaloids. The study of 46 samples revealed the presence of PA in the honeys tested and that some contained high concentrations of this substance. 74% contained PAs with a total PAs’ concentration ranging from 1 to 748 μg/kg of PApositive samples. This study demonstrated that Algerian honeys may contain high amounts of PAs exceeding the current recommendations. Massive intoxication during honey consumption seemed unlikely. However, long-term consumption of large quantities of highly contaminated honey could lead to poisoning specially in possible additional exposure of consumer to PAs from other sources like medicinal plants, which is recognized as a potential threat to human health. For that reason, beekeepers have been advised to carry out more rigorous quality control tests to the evaluation of PAs in honeys