Background:Ajowan,dill,moldavian balm and black cumin are annual medicinal plants,essential oil bearing that are cultivated in different parts of the world.Methods:A field experiment was conducted to assess the essent...Background:Ajowan,dill,moldavian balm and black cumin are annual medicinal plants,essential oil bearing that are cultivated in different parts of the world.Methods:A field experiment was conducted to assess the essential oil of ajowan,dill,moldavian balm and black cumin under salinity of 0.3,3,6 and 9 dS/m NaCl.Essential oils were obtained by using a Clevenger apparatus and their constituents were identified by GC and GC/MS.Results:Results showed that essential oil yield varied in tested plants under salt stress,but its changes did not follow a specific trend.Thymol was the most abundant constituent of ajowan seed essential oil,while thymol,γ-terpinene and p-cymene were the major constituents of the foliage essential oil of it.The most important component of dill seed essential oil was carvone and three main components of foliage essential oil were carvone,limonene andα-phellandrene.The essential oil component in moldavian balm mostly contained neral,geranial,geraniol,neryl acetate and geranyl acetate.The essential oil of black cumin was mainly composed of p-cymene under saline irrigation.Conclusion:The essential oil yield and compositions were affected by salt stress.The essential oil yield decreased because of decreasing dry biomass production.展开更多
文摘Background:Ajowan,dill,moldavian balm and black cumin are annual medicinal plants,essential oil bearing that are cultivated in different parts of the world.Methods:A field experiment was conducted to assess the essential oil of ajowan,dill,moldavian balm and black cumin under salinity of 0.3,3,6 and 9 dS/m NaCl.Essential oils were obtained by using a Clevenger apparatus and their constituents were identified by GC and GC/MS.Results:Results showed that essential oil yield varied in tested plants under salt stress,but its changes did not follow a specific trend.Thymol was the most abundant constituent of ajowan seed essential oil,while thymol,γ-terpinene and p-cymene were the major constituents of the foliage essential oil of it.The most important component of dill seed essential oil was carvone and three main components of foliage essential oil were carvone,limonene andα-phellandrene.The essential oil component in moldavian balm mostly contained neral,geranial,geraniol,neryl acetate and geranyl acetate.The essential oil of black cumin was mainly composed of p-cymene under saline irrigation.Conclusion:The essential oil yield and compositions were affected by salt stress.The essential oil yield decreased because of decreasing dry biomass production.
