title: Effects of irrigation regimes on fatty acid composition, antioxidant and antifungal properties of volatiles from fruits of Koroneiki cultivar grown under Tunisian conditions.
abstract: The olive tree is generally grown under rain-fed conditions. However, since the yield response to irrigation is great, even with low amounts of water, there is increasing interest in irrigated agriculture. The main goal of this study was, therefore, to investigate the effect of irrigation regimes on olive (Olea europaea L., cv. Koroneiki) obtained from an intensively-managed orchard in a semi-arid area with a Mediterranean climate in Tunisia. Different irrigation treatments 50% ETc, 75% ETc and 100% ETc were applied to the olive orchard. Accordingly, the effects of three irrigation regimes on volatile compounds, fatty acid composition and biological activities of Koroneiki cultivar were studied. The total profile of the volatile constituents of all samples revealed the predominance of 3-ethenylpyridine (from 14.9-19.6%), phenylethyl alcool (from 7.8-19.2%) and benzaldehyde (from 9.0 to 13.8%). During watering level treatments studied, the major fatty acids were oleic, palmitic and linoleic. Antioxidant activity of the fresh fruit volatiles cultivated at a watering level of 100% ETc was higher than that obtained under 50 and 75% Etc. The results of antifungal activity showed that the fruits volatiles of the three irrigation treatments had varying degrees of growth inhibition against the microorganisms tested.
authors: Laboratory of Biochemistry, UR, Human Nutrition and Metabolic Disorder, Faculty of Medicine, Monastir 5019, Tunisia.
authors: Faten
authors: F
authors: Brahmi
authors: Laboratory of Microbiology, CHU, F. Bourguiba, Monastir, Tunisia 5000, Tunisia.
authors: Hechmi
authors: H
authors: Chehab
authors: Dipartimento di Chimica Bioorganica e Biofarmacia, via Bonanno 33, 56126 Pisa, Italy.
authors: Guido
authors: G
authors: Flamini
authors: Laboratory of Biochemistry, UR, Human Nutrition and Metabolic Disorder, Faculty of Medicine, Monastir 5019, Tunisia.
authors: Madiha
authors: M
authors: Dhibi
authors: Laboratory of Biochemistry, UR, Human Nutrition and Metabolic Disorder, Faculty of Medicine, Monastir 5019, Tunisia.
authors: Manel
authors: M
authors: Issaoui
authors: Laboratoire d'Ecophysiologie, Institut de l'Olivier de Sousse, Avenue Ibn Khaldoun, BP 14, 4061 Sousse, Tunisia.
authors: Maha
authors: M
authors: Mastouri
authors: Laboratory of Biochemistry, UR, Human Nutrition and Metabolic Disorder, Faculty of Medicine, Monastir 5019, Tunisia.
authors: Mohamed
authors: M
authors: Hammami
mesh_terms: D057914:Agricultural Irrigation / Q000379:methods*; D000935:Antifungal Agents / Q000378:metabolism / Q000494:pharmacology*; D000975:Antioxidants / Q000378:metabolism / Q000494:pharmacology*; D052160:Benzothiazoles / Q000737:chemistry; D001713:Biphenyl Compounds / Q000737:chemistry; D002175:Candida / Q000145:classification / Q000187:drug effects / Q000254:growth & development; D018556:Crops, Agricultural / Q000254:growth & development / Q000378:metabolism*; D005232:Fatty Acids, Volatile / Q000378:metabolism*; D005638:Fruit / Q000378:metabolism*; D008826:Microbial Sensitivity Tests; D031658:Olea / Q000254:growth & development / Q000378:metabolism*; D000069463:Olive Oil; D010851:Picrates / Q000737:chemistry; D010938:Plant Oils / Q000378:metabolism* / Q000494:pharmacology*; D013451:Sulfonic Acids / Q000737:chemistry; D014197:Trees; D014416:Tunisia; D014835:Volatilization
chemical_list: D000935:Antifungal Agents; D000975:Antioxidants; D052160:Benzothiazoles; D001713:Biphenyl Compounds; D005232:Fatty Acids, Volatile; D000069463:Olive Oil; D010851:Picrates; D010938:Plant Oils; D013451:Sulfonic Acids; C002502:2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid; C004931:1,1-diphenyl-2-picrylhydrazyl