The Potential Use of Aqueous Extract of Ulva lactuca seaweed for the Control of the Post-Harvest Citrus Green Mold, in vivo and in vitro conditions
2022
Al-Alam, Joséphine | Salim, Douaa | Fajloun, Ziad | Millet, Maurice | Chbani, Asma | School of Engineering [Lebanese American University] (SOE/LAU) ; Lebanese American University (LAU) | Laboratoire de Chimie Agro-Industrielle (LCA) ; Ecole nationale supérieure des ingénieurs en arts chimiques et technologiques (ENSIACET) ; Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Ecole d'Ingénieurs de Purpan (INP - PURPAN) ; Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Doctoral School of Sciences and Technology [Lebanese University] ; الجامعة اللبنانية [بيروت] = Lebanese University [Beirut] = Université libanaise [Beyrouth] (LU / ULB) | Faculty of Sciences [Lebanese University] | Faculté des Sciences [Université Libanaise] ; الجامعة اللبنانية [بيروت] = Lebanese University [Beirut] = Université libanaise [Beyrouth] (LU / ULB) | Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES) ; Université de Strasbourg (UNISTRA)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE) ; Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS) | Faculty of Public Health [Lebanese University] (FSP III) ; الجامعة اللبنانية [بيروت] = Lebanese University [Beirut] = Université libanaise [Beyrouth] (LU / ULB)
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Show more [+] Less [-]English. Seaweed liquid extracts (SLE) were assessed as natural antifungal products for the control of the post-harvest citrus green mold Penicillium digitatum. The SLE of a green alga, Ulva lactuca, at different concentration (25, 50, 100 and 200 g L-1) were evaluated for their inhibitory potential of the in vivo development of P. digitatum on fresh oranges and of the in vitro conidia germination and tube elongation of the mold on potato dextrose broth (PDB). The study of their effects on fungus viability on malt extract agar (MEA) was also evaluated. The results revealed that the assessed SLE at 50 and 100 g L-1 allowed a potential inhibition of the fungus viability and development. The U. lactuca liquid extract at 50 g L-1 allowed a complete in vivo protection of the oranges from the mold for the total duration of the study and a 90 % inhibition of spore germination. Moreover, the chemical characterization of the extract showed valuable content in polysaccharides and mainly in ulvan, known for its antifungal effects. These findings could be highly promising to develop an eco-friendly, safe and effective product for citrus fruit post-harvesting protection.
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