Chemical Characterization and Nematicidal Activity of the Essential Oil of Nepeta nuda L. ssp. pubescens and Nepeta curviflora Boiss. from Lebanon. Issue 6 (2nd November 2017)

• Record Type: Journal Article
• Authors: Musso, Loana; Scaglia, Barbara; Haj, Ghina Al; Arnold, Nelly Apostolides; Adani, Fabrizio; Scarì, Giorgio; Dallavalle, Sabrina; Iriti, Marcello
• Is Part Of: Journal of essential oil-bearing plants. Volume 20:Issue 6(2017)
• Page Start: 1424
• Page End: 1433
• Publication Date: 2017-11-02
• Subjects: Aromatic plants -- nematodes -- isoprenoids -- biopesticides -- anthelmintics; Essences and essential oils -- Periodicals; Aromatic plants -- Biotechnology -- Periodicals; Oilseed plants -- Biotechnology -- Periodicals; Aromatic plants -- Periodicals; Oilseed plants -- Periodicals; 661.80605
• DOI: 10.1080/0972060X.2017.1407678
• Languages: English
• ISSNs: 0972-060X

Abstract

Abstract: The chemical characterization and the nematicidal activity of the essential oils from Nepeta nuda L. ssp. pubescens and Nepeta curviflora Boiss. growing wild in Lebanon are reported. A comparative study was carried out as, to the best of our knowledge, no information is available on Nepeta nuda L. ssp. pubescens . In addition, both Nepeta species were collected in the same geographical area in order to rule out the environmental factors influencing essential oil composition and bioactivity. The most abundant (> 5%) components of N. nuda ssp. pubescens essential oil were pinene (12.89%), 1-ethyl-1H-pyrrole (12.67%), 1-cycloethyl-1-(2-methylenecyclohexyl)ethanol (10.37%), 3-methyl-2-cyclohexen-1-one (9.17%) and 2, 3-dimethyl-3-hexanol (5.88%). Among oxygenated monoterpenes, two nepetalactones were identified, i.e. ( E, Z )-nepetalactone (2.24%) and ( Z, E )-nepetalactone (0.31%). The major constituents (> 5%) of N. curviflora essential oil were 2-isopropyl-5-methyl-3-cyclohexen-1-one (12.51%), (-)-spathulenol (11.73%), cis - Z -α-bisabolene epoxide (8.07%), widdrol (7.0%), ( E, Z )-5, 7-dodecadiene (6.93%), dihydronepetalactone (5.57%) and 4-propyl-cyclohexene (5.43%). The essential oil of N. curviflora was more active than the N. nuda ssp. pubescens one against the nematode Panagrolaimus rigidus . According to the motility assay, LD50 was 0.5 mg/mL and 2.5 mg/mL 24 h after treatment with N. curviflora and N. nuda ssp. pubescens essential oil, respectively.