Characterization of seasonal and chemotypical variability in the essential oil from leaves of Annona neosalicifolia H. Rainer (Annonaceae)

The essential oil (EO) from leaves of Annona neosalicifolia H. Rainer (Annonaceae) obtained two chemotypes in the southern Brazilian Atlantic Rainforest was analysed both by GC-FID and GC-MS. Forty compounds were identified, accounting for 95.9 to 99.5% total each sample. VOs characterized predominance sesquiterpenes all samples, being main bicyclogermacrene (13.9-41.8%) beta-caryophyllene (9.3-26.3%); germacrene D also found high amounts, but its concentration more variable. Monoterpene absent summer fall with higher concentrations winter samples (6.1-7.4% α-pinene 6.4-11.2% β-pinene). EO chemotype II a sesquiterpene alcohol (E)-nerolidol (36.3%), which or trace amounts I. characterization these seasonal individual variations chemical composition A. may have agronomical implications be important understanding delimitation metabolic plasticity highly variable taxon emarginata as well.