Piper rivinoides Kunth: A medicinal plant that preserves bioactive chemical substances in its essential oil throughout the seasons

The chemical composition and seasonal variation of essential oils (EO) extracted from the aerial parts traditional medicinal plant Piper rivinoides were analyzed using gas chromatography (GC) coupled with mass spectrometry (MS) GC flame ionization detector (GC-FID) technique, respectively. wild plants collected two different sites in Atlantic Forest. analysis allowed us to identify 96.60 99.80% EO composition. major compounds highest relative percentage for both specimens, regardless season, bioactive monoterpenes α-pinene β-pinene, which ranged 34.78 (summer) 53.87% (winter) 15.24% (autumn) 47.71% (winter), stability study specimens throughout year indicates that phenological cycle influences biosynthesis more than abiotic factors. This type phenotypic is rarely observed species belonging Piperaceae family, characterized by high variability. Furthermore, this favorable, P. has potential be a source compounds. Key words: -pinene, Forest, aromatic plant, volatile