Abstract
The chemical composition of essential oils of Adenosma bracteosum Bonati plants collected in Xishuangbanna, China has been reported. The essential oil was obtained by hydro-distillation from fresh aerial parts. Up to 27 compounds were identified by gas chromatography–mass spectrometry. γ-terpinene (34.9 %), carvacrol (14.0 %), carvacrol methyl ether (12.5 %), and p-cymene (10.0 %) were found to be the major compounds. The phytotoxic potential of this oil, and its four main ingredients, on B. pilosa was verified with pure compounds. The half maximal inhibitory concentration values were 49.2, 107.0, 105.6, 154.0, and 273.2 μl/L for oil, γ-terpinene, carvacrol, carvacrol methyl ther, and p-cymene, respectively. The result reveled that the oil and its 4 main ingredients were toxic to B. pilosa. The most phytotoxic components of the essential oils are carvacrol and γ-terpinene, though less effective than the oil as a whole. The essential oils showed phytotoxic activity against the seed germination and seedling growth of B. pilosa by causing damage to photosystem II, affecting antioxidant enzymes activity, and disturbing membrane integrity.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call