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Etude de deux halophytes, Armeria maritima (Mill.) Willd. et Helichrysum stoechas (L.) Moench : exploration phytochimique, approche biotechnologique et valorisation dermo-cosmétique

Abstract : The phytochemical study of Armeria maritima and Helichrysum stoechas led to the isolation of 31 molecules never reported before in the genus Armeria, 4 of which being new flavonol diglycosides, and to the development of a dereplication strategy for the study of H. stoechas. In both species, an abundance of polyphenols was observed, which could be extracted with eco-friendly methods like SFE. Both halophytes showed a strong biological potential as their extracts and molecules demonstrated antioxidant, anti-collagenase, anti-inflammatory and wound healing activities. Moreover, we initiated for the first time cell suspensions of A. maritima, and identified elicitors, such as methyl-jasmonate, which led to H. stoechas cell suspensions with an increased content in 3,5-dicaffeoylquinic acid, a bio-marker of anti-inflammatory activity. The production of bioactive molecules in "plant cell factories" could be scaled-up to enhance the valorization potential of both halophytes in dermocosmetics.
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https://tel.archives-ouvertes.fr/tel-02918194
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Submitted on : Thursday, August 20, 2020 - 10:56:34 AM
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Lorène Gourguillon. Etude de deux halophytes, Armeria maritima (Mill.) Willd. et Helichrysum stoechas (L.) Moench : exploration phytochimique, approche biotechnologique et valorisation dermo-cosmétique. Sciences pharmaceutiques. Université de Strasbourg, 2017. Français. ⟨NNT : 2017STRAF039⟩. ⟨tel-02918194⟩

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