Chemical constituents of the volatiles of stem with leaf and flower of Neanotis lancifolia (Hook.f.) W.H.Lewis growing plateau region of Western Ghats, India

The hydro-distilled volatile constituents from the stem with leaf and flower of Neanotis lancifolia (Hook.f.) W.H.Lewis (Rubiaceae) were investigated for the first time by using gas chromatography equipped with a flame ionization detector (GC-FID) and gas chromatography coupled with mass spectrometry (GC-MS). Forty-two and twelve compounds were identified from the stem with leaf and flower parts oils, respectively, representing 98.5% and 97.1% of the total oil constituents, respectively. The major constituents were identified as linalool (35.9% stem with leaf; 23.3% flower) and borneol (15.0% stem with leaf; 29.2% flower). The volatile oils of both parts of the plant N. lancifolia were found to be rich in oxygenated monoterpene type of constituents.

Chemical Composition, Antimicrobial and Antioxidant Activities of the Volatile Oil of Ganoderma pfeifferi Bres

In a first study of the volatile oil of the mushroom basidiomycete Ganoderma pfeifferi Bres., the chemical composition and antimicrobial and antioxidant activities of the oil were investigated. The volatile oil was obtained from the fresh fruiting bodies of Ganoderma pfeifferi Bres. By hydrodistillation extraction and analyzed by GC-MS. The antimicrobial activity of the oil was evaluated against five bacteria strains and two types of fungi strains, using disc diffusion and broth microdilution methods. In addition, the antioxidant activity of the oil was determined using DPPH assay. Four volatile compounds representing 90.5% of the total oil were identified. The majority of the essential oil was dominated by 1-octen-3-ol (amyl vinyl carbinol) 1 (73.6%) followed by 1-octen-3-ol acetate 2 (12.4%), phenylacetaldehyde 3 (3.0%) and 6-camphenol 4 (1.5%). The results showed that the Gram-positive bacteria species are more sensitive to the essential oil than Gram-negative bacteria. The oil showed strong antimicrobial activity against Staphylococcus aureus as well as Candida albicans. Moreover, the oil exhibited strong radical scavenging activity in the DPPH assay. This first report on the chemical composition and biological properties of G. pfeifferi volatile oil makes its pharmaceutical uses rational and provides a basis in the biological and phytochemical investigations of the volatile oils of Ganodermataceae species.