Interspecific variation, antioxidant and allelopathic activity of the essential oil from three Launaea species growing naturally in heterogeneous habitats in Egyptстатья из журнала
Аннотация: Abstract Essential oils ( EO s) from the aerial parts of three Launaea species collected from two different habitats were extracted [ Launaea mucronata collected from coastal desert ( LMC ) and from inland desert ( LMD ), Launaea nudicaulis collected from coastal desert ( LNC ) and from inland desert ( LND ), Launaea spinosa ( LS )]. The EO s were analysed by gas chromatography mass spectrometry ( GC ‐ MS ) and tested for antioxidant activity as well for allelopathic activity against purslane. A total of 117 compounds were identified from all samples, including 64 from LS , 50 from LMC , 39 from LMD , 24 from LNC , and 20 from LND , representing 100% of the total oil mass. The oxygenated sesquiterpenes were the major compounds of the EO s from LS , LMC , LMD , LNC , and LND , representing 62.73, 61.02, 58.35, 43.22, and 48.33%, respectively, whereas the monoterpene hydrocarbons were minor compounds in all samples. α‐Acorenol (31.42%), trans ‐longipinocarveol (12.04%), and γ‐eudesmol (6.31%) represented the major compounds of the EO from LS , whereas hexahydrofarnesyl acetone and n ‐heneicosane represented the major compounds from LMC , LMD , LNC , and LND . Correlations between the EO s of the five samples were studied via principal component analysis and agglomerative hierarchical clustering, based on the chemical composition of the EO s. There was a significant variation between Launaea species regarding both the quality and the quantity of EO composition, whereas no significant difference was observed based on the habitats (coastal and inland deserts). The EO s of the five Launaea samples exhibited meaningful antioxidant activities, as follows: LND > LNC > LMD > LMC > LS . Moreover, the EO s of the five Lanaea samples exhibited significant allelopathic activity against purslane weed in a concentration‐dependent manner. LMD and LMC showed the highest effect, with germination inhibition of 96.1 and 87.9% at 250 μL L −1 , and radicle growth inhibition of 92.6 and 89.7%, but LS was the least effective extract. Our results showed that the variation in the quality and quantity of EO composition is mainly species specific, with a slight correlation with habitats.
Год издания: 2019
Авторы: Abdelsamed I. Elshamy, Ahmed M. Abd‐ElGawad, Yasser A. El‐Amier, Abd El‐Nasser G. El Gendy, Saud L. Al‐Rowaily
Издательство: Wiley
Источник: Flavour and Fragrance Journal
Ключевые слова: Essential Oils and Antimicrobial Activity, Phytochemistry and Biological Activities, Allelopathy and phytotoxic interactions
Открытый доступ: closed
Том: 34
Выпуск: 5
Страницы: 316–328