title: Culture conditions and salt effects on essential oil composition of sweet marjoram (Origanum majorana) from Tunisia.
abstract: O. majorana shoots were investigated for their essential oil (EO) composition. Two experiments were carried out; the first on hydroponic medium in a culture chamber and the second on inert sand in a greenhouse for 20 days. Plants were cultivated for 17 days in hydroponic medium supplemented with NaCl 100 mmol L⁻¹. The results showed that the O. majorana hydroponic medium offered higher essential oil yield than that from the greenhouse. The latter increased significantly in yield (by 50 %) under saline constraint while it did not change in the culture chamber. Under greenhouse conditions and in the absence of salt treatment, the major constituents were terpinen-4-ol and trans-sabinene hydrate. However, in the culture chamber, the major volatile components were cis-sabinene hydrate and terpinen-4-ol. In the presence of NaCl, new compounds appeared, such as eicosane, spathulenol, eugenol, and phenol. In addition, in the greenhouse, with or without salt, a very important change of trans-sabinene hydrate concentration in EO occurred, whereas in the culture chamber change appeared in cis-sabinene hydrate content.
authors: Département de Biologie, Faculté des Sciences de Tunis, Unité de Physiologie et Biochimie de la Tolérance au Sel des Plantes, Campus Universitaire, 2092 Tunis, Tunisie. baatourolfanaiimi@gmail.com
authors: Olfa
authors: O
authors: Baâtour
authors: Imen
authors: I
authors: Tarchoune
authors: Hela
authors: H
authors: Mahmoudi
authors: Nawel
authors: N
authors: Nassri
authors: Wissal
authors: W
authors: Abidi
authors: Rym
authors: R
authors: Kaddour
authors: Ghaith
authors: G
authors: Hamdaoui
authors: Mouhiba Ben
authors: MB
authors: Nasri-Ayachi
authors: Mohtar
authors: M
authors: Lachaâl
authors: Brahim
authors: B
authors: Marzouk
mesh_terms: D000081008:Bicyclic Monoterpenes; D005410:Flame Ionization; D008401:Gas Chromatography-Mass Spectrometry; D018527:Hydroponics; D039821:Monoterpenes / Q000032:analysis / Q000737:chemistry / Q000378:metabolism; D009822:Oils, Volatile / Q000737:chemistry* / Q000302:isolation & purification; D031341:Origanum / Q000737:chemistry* / Q000254:growth & development* / Q000378:metabolism; D018520:Plant Shoots / Q000737:chemistry* / Q000254:growth & development* / Q000378:metabolism; D011786:Quality Control; D054712:Salinity; D055051:Salt-Tolerant Plants / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism; D013237:Stereoisomerism; D013312:Stress, Physiological; D013729:Terpenes / Q000032:analysis / Q000737:chemistry / Q000378:metabolism; D014416:Tunisia; D055549:Volatile Organic Compounds / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism
chemical_list: D000081008:Bicyclic Monoterpenes; D039821:Monoterpenes; D009822:Oils, Volatile; D013729:Terpenes; D055549:Volatile Organic Compounds; C029292:origanum oil; C034019:terpinenol-4; C534325:2-methyl-5-(1-methylethyl)bicyclo(3.1.0)hexan-2-ol