Journal
JOURNAL OF APPLIED RESEARCH ON MEDICINAL AND AROMATIC PLANTS
Volume 13, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jarmap.2019.100204
Keywords
Essential oil; Ultrasound; Iberis amara; Bioactivity; Chemical constituents
Categories
Funding
- Chongqing Science and Technology Commission [cstc2013kjrcljrccj10003]
- National 111 Plan'' Base [B06023]
- Key Projects of Basic Science and Advanced Technology Research of Chongqing City [cstc2015jcyjBX0125]
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In this study, ultrasound-assisted hydro-distillation (UAHD) extraction of essential oil (EO) from Iberis amara seeds was optimized using response surface methodology (RSM). The maximum recovery of EO was 0.42 +/- 0.05% (v/w) using the optimal extraction parameters (extraction time of 240 min, ultrasonic power of 75 W and solvent-to-sample ratio of 6.7 mL/g). UAHD showed a significantly higher amount of EO compared to the traditional methods hydro-distillation (HD) (0.26 +/- 0.07% (v/w)) and steam distillation (SD) (0.19 +/- 0.04% (v/w)) (P < 0.05). Scanning electron microscope (SEM) images revealed that the seeds were crushed into tiny particles after UAHD, which is believed to facilitate secretion of EO. Subsequently, 28 kinds of compounds were identified by GC-MS for the EOs extracted by UAHD, HD and SD and with similar quantitative characters. The principal constituents were 4-Carvomenthenol (18.75 - 22.13%), Menthone (10.95 - 12.36%), Neodihydrocarveol (9.78 - 11.38%) and alpha-Curcumene (9.37 - 10.81%). Further study on bioactivity of EO samples was carried out. The oils obtained with the three techniques exerted slightly different but good antioxidant and anti-inflammatory effects, cytotoxicity on human colon cancer cells, as well as antibacterial and anti-feedant effects against Pieris rapae larvea. In conclusion, this study suggests that UAHD is an excellent technology for EO extraction and may have industrial applications. In addition, Iberis amara seed extracts can become more available as a natural resource for food and pharmaceutical industries.
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