Volume: 43 Issue: 4
Effect of different drying methods on the variation of volatile oil composition in different parts of Trachyspermum ammi (L.)
Year: 2021, Page: 143-147, Doi: https://doi.org/10.62029/jmaps.v43i4.Niranjana
Received: Aug. 12, 2021 Accepted: Nov. 27, 2021 Published: Dec. 31, 2021
Trachyspermum ammi (L.) Sprague (Family: Apiaceae), commonly known as Ajwain, is widely grown in India, Afghanistan, Iran, Egypt, Pakistan, etc. Conventionally distillation of the Ajwain crop is done before the formation of the seed for extraction of the essential oil. The quality and quantity of essential oil production depend not only on genetic factors but also on the plant’s developmental stage, post-harvest treatments, etc. Thus, the present study was undertaken to find out the effect of six factors like drying of the herb in the shade, sun, and oven (after seed formation), harvesting before and after seed formation, and powdering the material after seed formation on the essential oil yields and chemical composition. A marked difference was noted in the essential oil yields in all the experiments, with maximum yield being observed in the sun-drying method (3.2%). In contrast, a low yield was noted in the powdered material(0.3%). The chemical composition of the essential oil showed an interesting pattern. The major component y-terpinene was observed more in the essential oil obtained in the after-seed harvest material (74.201%), whereas its low abundancy was noted in the oven-dried material (31.756%). Powdering the material has influenced the thymol content evident from the essential oil obtained from the unpowdered material (37.916%)to the powdered material (3.99%); both were done before seed harvest. Based on the above results, it can be concluded that the essential oil characteristics of Ajwain are greatly influenced by drying temperature, methods of sample preparation, and storage of herbage.
Keywords: Essential oil, Sundry, -Terpinene, Thymol, Trachyspermum ammi (L.)
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© CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow-226015
Niranjana Kumar, A., Kotesh Kumar, J., Satya Srinivas, K. V. N., Vijay Kumar, M., Kiranbabu, G. D., & Ravi, G. (2021). Effect of different drying methods on the variation of volatile oil composition in different parts of Trachyspermum ammi (L.). Journal of Medicinal and Aromatic Plant Sciences, 43(4), 143–147.
