The essential oils of five Nepeta Species. A preliminary evaluation of their use in chemotaxonomy by cluster analysis

Abstract

The essential oils of Nepeta cataria L., N. X faassenii Bergm. ex Stearn, N. nepetella L., N. sibirica L. and N . nuda L., isolated by steam distillation, were analysed by GC and GC-MS. The compositions of the oils were submitted to a cluster analysis by application of the CLUSTAN program, with a view to testing their use in chemotaxonomy.

Simultaneous UHPLC/DAD/(+/−)HESI–MS/MS Analysis of Phenolic Acids and Nepetalactones in Methanol Extracts of Nepeta Species: A Possible Application in Chemotaxonomic Studies

“…Nepetalactone‐containing Nepeta species significantly differ in nepetalactone qualitative and quantitative content. Nepeta mussinii (Regnier et al ., ) and N. × faassenii EOs (De Pooter et al ., ) have been reported to contain cis,cis ‐nepetalactone and its presence was confirmed in our study. The highest content of cis,cis ‐nepetalactone was recorded in N. mussinii (7.39 mg/g fw) and N. cataria (5.80 mg/g fw), although cis,trans ‐nepetalactone has been previously reported as the dominant nepetalactone diastereoisomer in N. cataria (Regnier et al ., ; Lawrence, ; Handijeva et al ., ), as well as in N. sibirica (Letchamo et al ., ) and N. × faassenii (Radulović et al ., ).…”

Essential oil composition ofNepeta nuda L. ssp.nuda

“…1,9,15 De Pooter reported the presence of varying amounts of 1, 8-cineole, a mixture of nepetalactones and germacrene-D as chief components in dierent N. nuda oils. 1,9 Handjieva et al showed that a nepetalactone isomer was present in high concentrations in the oil from Bulgarian populations of N. nuda. 15 The essential oil of N. nuda ssp.…”

“…3±7 Many Nepeta species have also been investigated for their oil constituents. Most oils of Nepeta species contain nepetalactones as the main components 1,8,9 but dierent oil compositions have been detected in several Nepeta species (e.g. N. discolor, 10 N. govaniana, 11 N. italica 12 and N. cilicia 13 ).…”

Phytotoxic effects of essential oils ofNepeta curvifloraBoiss. andNepeta nudaL. subsp.albifloragrowing wild in Lebanon

“…Nepeta nuda L. is one of the most common species of the genus Nepeta. It is widespread from central and southeast Europe into Russia and towards southwest and central Asia (De Pooter et al 1988). N. nuda ssp.…”

“…Many Nepeta species have been investigated for their oil constituents and it has been shown that some Nepeta species contain diastereomeric nepetalactones as main constituents, often responsible for their feline attractant or insect repellent properties (De Pooter et al 1988). However, different oil compositions have been detected in several Nepeta species.…”