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Istituto Agronomico Mediterraneo di Bari (IAMB) 2017

Lebanese organic exotic fruits (avocado and sugar-apple) : exploitation as new fermented food and natural products

Tlais, Ali Zein Alabiden

Titre : Lebanese organic exotic fruits (avocado and sugar-apple) : exploitation as new fermented food and natural products

Auteur : Tlais, Ali Zein Alabiden

Etablissement de soutenance : Istituto Agronomico Mediterraneo di Bari (IAMB)

Grade : Master of science : Mediterranean organic agriculture 2017

Résumé
Organic tropical and sub-tropical fruits consumption in the world is constantly increasing, due to growing interest for fruits characterized by pronounced flavor and aroma and high nutritional and functional properties. One of the main constraints of these fruits is to be the highly perishable. Processing options are needed to ensure their exploitation as new food and/or natural products. In this study, organic avocado (Persea americana Mill.) and sugar apple (Annona squamosa L.) fruits were collected from Tyre (Lebanon) to investigate their microbial diversity and to evaluate their exploitation as natural products through bioprocessing technology. A low diversity of lactic acid bacteria and yeasts associated with fruits was highlighted. Microbes were identified by partial 16s rRNA and 26S rDNA gene sequences, respectively. Fermentation protocol was set up depending on the fruit. Avocado fruits were fermented with autochthonous lactic acid boicteria, whereas sugar apple fruits were exploited for antimicrobial activities through in vitro assays. Fermented avocado powder hod improved functional properties with high antioxidants in comparison to control. Sugar apple peel extract demonstrated strong antimicrobial activities due to the high content of catechins derivatives. Our study highlighted, that valuable and novel strategies may exploit the intrinsic features of tropical fruits providing a benefit important for human diet.

Mots-clés : FOOD QUALITY ; FRUITS ; HUMAN HEALTH ; HUMAN NUTRITION ; ORGANIC FARMING ; ORGANIC FOODS ; ORGANIC PRODUCTS

Présentation (IAMB Library)

Page publiée le 13 mars 2018, mise à jour le 13 septembre 2018