title: Colonization of olive trees (Olea europaea L.) with the arbuscular mycorrhizal fungus Glomus sp. modified the glycolipids biosynthesis and resulted in accumulation of unsaturated fatty acids.
abstract: The influence of arbuscular mycorrhizal (AM) fungi colonization on photosynthesis, mineral nutrition, the amount of phospholipids and glycolipids in the leaves of olive (Olea europaea L.) trees was investigated. After six months of growth, the rate of photosynthesis, carboxylation efficiency, transpiration and stomatal conductance in mycorrhizal (M) plants was significantly higher than that of non-mycorrhizal (NM) plants. The inoculation treatment increased the foliar P and Mg but not N. The amount of glycolipids in the leaves of M plants was significantly higher than that of NM plants. However, the amount of phospholipids in the leaves of M plants was not significantly different to that in the leaves of NM plants. Also, we observed a significant increase in the level of α-linolenic acid (C18:3ω3) in glycolipids of M plants. This work supports the view that increased glycolipids level in the leaves of M plants could be involved, at least in part, in the beneficial effects of mycorrhizal colonization on photosynthesis performance of olive trees. To our knowledge, this is the first report on the effect of AM fungi on the amount of glycolipids in the leaves of mycorrhizal plants.
authors.affiliation: Laboratoire de Biochimie, USCR Spectrométrie de Masse, LR-NAFS/LR12ES05 Nutrition-aliments fonctionnels et santé vasculaire, Faculté de Médecine, université de Monastir, 5019 Monastir, Tunisia. Electronic address: beligh.mechri77@yahoo.fr.
authors.forename: Beligh
authors.initials: B
authors.lastname: Mechri
authors.affiliation: Equipe Recherches Agronomiques, Agronutrition, 3 avenue de l'Orchidée, Parc Activestre, Carbonne 31390, France.
authors.forename: Faouzi
authors.initials: F
authors.lastname: Attia
authors.affiliation: Laboratoire de Biochimie, USCR Spectrométrie de Masse, LR-NAFS/LR12ES05 Nutrition-aliments fonctionnels et santé vasculaire, Faculté de Médecine, université de Monastir, 5019 Monastir, Tunisia.
authors.forename: Meriem
authors.initials: M
authors.lastname: Tekaya
authors.affiliation: Institut de l'Olivier, Unité Spécialisée de Sousse, Rue Ibn Khaldoun, B.P.: 14, 4061 Sousse, Tunisia.
authors.forename: Hechmi
authors.initials: H
authors.lastname: Cheheb
authors.affiliation: Laboratoire de Biochimie, USCR Spectrométrie de Masse, LR-NAFS/LR12ES05 Nutrition-aliments fonctionnels et santé vasculaire, Faculté de Médecine, université de Monastir, 5019 Monastir, Tunisia.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Hammami
mesh_terms: D005231:Fatty Acids, Unsaturated / Q000378:metabolism*; D055137:Glomeromycota / Q000502:physiology*; D006017:Glycolipids / Q000096:biosynthesis* / Q000378:metabolism; D038821:Mycorrhizae / Q000502:physiology; D031658:Olea / Q000382:microbiology* / Q000502:physiology*; D010743:Phospholipids / Q000378:metabolism*; D018515:Plant Leaves / Q000378:metabolism; D013559:Symbiosis
chemical_list: D005231:Fatty Acids, Unsaturated; D006017:Glycolipids; D010743:Phospholipids
keywords: Arbuscular mycorrhiza; Glomus sp.; Glycolipids; Olea europaea; Phospholipids