Essential oil composition of Peperomia serpens (Sw.) Loud

The fresh- and dried-leaf oils and the fresh-leaf concentrate of Peperomia serpens were obtained by hydrodistillation and SPME, and analyzed by GC and GC/MS. The main compounds identified in the hydrodistilled fresh-leaf oil were (Z)-nerolidol acetate (42.9%) and (E)-nerolidol (31.3%). The major con...

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Bibliographic Details
Published in:The Journal of essential oil research 2006-05, Vol.18 (3), p.269-271
Main Authors: Silva, A.C.M. da, Andrade, E.H.A, Carreira, L.M.M, Guimaraes, E.F, Maia, J.G.S
Format: Article
Language:English
Subjects:
(E)-nerolidol
(Z)-nerolidol
beta-caryophyllene
chemical composition
epiphytes
essential oil composition
essential oils
headspace analysis
headspace volatiles
herbaceous plants
humulene
leaves
Peperomia
Peperomia serpens
Piperaceae
plant extracts
rain forests
volatile organic compounds
α-humulene
β-caryophyllene
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Summary:The fresh- and dried-leaf oils and the fresh-leaf concentrate of Peperomia serpens were obtained by hydrodistillation and SPME, and analyzed by GC and GC/MS. The main compounds identified in the hydrodistilled fresh-leaf oil were (Z)-nerolidol acetate (42.9%) and (E)-nerolidol (31.3%). The major constituents found in the SPME fresh-leaf headspace were alpha-humulene (49.1%) and beta-caryophyllene (35.1%). The hydrodistilled dried-leaf oil was dominated by (Z)-nerolidol acetate (36.6%) and (E)-nerolidol (29.1%). It seems that the hydrolysis of alpha-humulene, identified only in the SPME fresh-leaf headspace, was responsible by the appearance of (E)-nerolidol in the fresh- and dried-leaf oils, followed by isomerization and acetylation to produce (Z)-nerolidol acetate, being all the process heat provoked.
ISSN:1041-2905
2163-8152
DOI:10.1080/10412905.2006.9699084