Chemical composition, antioxidant and antimicrobial activities of the edible medicinal <i>Ononis natrix</i> growing wild in Tunisia

<div><p>Results showed that leaf methanolic extract of <i>Ononis natrix</i> has important total phenol (51 mg GAE/g DW) and flavonoid (14.76 CE/g DW) contents. The chemical composition of <i>O. natrix</i> leaf revealed the presence of quercitine (24.5%), amentoflavone (14.1%), flavones (11.3%) and kaempferol (10.5%). The leaf extract showed a high total antioxidant activity with 60.94 mg of GAE/g DW, displayed a high 2,2-diphenyl-1-picrylhydrazyl scavenging ability with low IC₅₀ value (29 μg/mL) and a great reducing power (EC₅₀ = 100 μg/mL). <i>O. natrix</i> leaf extract exhibited a significant broad spectrum activity against all tested microorganisms with bacterial inhibition zone sizes ranging from 8.5 to 17 mm in diameter.</p></div

Lipid, fatty acid and tocol distribution of coriander fruit's different parts

International audienceHigh amounts of neutral lipids (NL) were found (95.65% of total lipids) in whole fruit oil, while glycolipids (GLs) occurred at high levels in pericarp oil (73.21% of total lipids). Triacylglycerol was found to be the principal lipid fraction of NL which formed 93% in seed and whole fruit. However, monoacylglycerol constituted the major fraction of NL in pericarp (34.5%). At least two GLs and five phospholipids (PL) were identified. The CL composition of the pericarp is characterized by monogalactosylacylglycerol as the major fraction with a percentage of 53.39% of total lipids. The major individual PL subclasses were phosphaticlylcholine followed by phosphaticlylethanolamine in seed and whole fruit. However, the PL were not detected in pericarp, oil. The principal fatty acids identified in most lipid classes were petroselinic acid (C18:1n-12), linoleic acid (C18:2n-6), palmitic (C16:0) and oleic acid (C18:1n-9). The total tocopherol and tocotrienol (tocol) contents were 27.78 mg/100 g oil in whole fruit, 26.42 mg/100g oil in seed and 5.36mg/100g oil in pericarp. Fruit and seed oils were characterized by a high amount of gamma-tocotrienol with 19.56 mg/100 g oil. However, a-tocopherol (1.82 mg/100g oil) was found to be the tocol marker in pericarp oils. The results are important as an indication of the potentially economical utility of Coriandrum sativum L. seed oil as a new source of PL. (C) 2009 Published by Elsevier B.V