Growth, yield, chemical composition, and antioxidant activity of essential oils from two thyme species under foliar application of jasmonic acid and water deficit conditions

Eugenia florida DC. belongs to the Myrtaceae family, which is present in almost all of Brazil. This species is popularly known as pitanga-preta or guamirim and is used in folk medicine to treat gastrointestinal problems. In this study, two specimens of Eugenia florida (Efl) were collected in different areas of the same region. Specimen A (EflA) was collected in an area of secondary forest (capoeira), while specimen B (EflB) was collected in a floodplain area. The essential oils (EOs) were extracted from both specimens of Eugenia florida by means of hydrodistillation. Gas chromatography coupled to mass spectrometry (GC/MS) was used to identify the volatile compounds present, and the antioxidant capacity of the EOs was determined by antioxidant capacity (AC-DPPH) and the Trolox equivalent antioxidant (TEAC) assay. For E. florida, limonene (11.98%), spathulenol (10.94%) and α-pinene (5.21%) were identified as the main compounds of the EO extracted from sample A, while sample B comprised selina-3,11-dien-6α-ol (12.03%), eremoligenol (11.0%) and γ-elemene (10.70%). This difference in chemical composition impacted the antioxidant activity of the EOs between the studied samples, especially in sample B of E. florida. This study is the first to report on the antioxidant activity of Eugenia florida DC. essential oils.

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Foliar application effects of salicylic acid and jasmonic acid on the essential oil composition of Salvia officinalis

Turkish Journal of Biochemistry ◽

10.1515/tjb-2017-0183 ◽

2018 ◽

Vol 43 (4) ◽

pp. 417-424 ◽

Cited By ~ 1

Author(s):

Mehrab Yadegari

Keyword(s):

Salicylic Acid ◽

Jasmonic Acid ◽

Essential Oils ◽

Foliar Application ◽

Essential Oil Composition ◽

Research Field ◽

Salvia Officinalis ◽

Oil Composition ◽

Average Temperature ◽

And Control

Abstract Aim In this research, the effects of two elicitors [jasmonic acid (JA) and salicylic acid (SA)] on the accumulation of essential oils in the seed cultures of Sage (Salvia officinalis L.) were studied. Materials and methods This research was conducted at the research field of Islamic Azad University, Shahrekord branch located at 50°56/E longitude, 32°18/N latitude during 2015 and 2016. The study area was classified as semi cold with an average temperature of 11.5°C and semi-arid with 329.9 mm of average rainfall. Seeds of sage were planted under field conditions. The following treatments were applied after the plants had four leaves: water, acetone, JA (0.1051, 0.2102, 0.4204, 0.8408 g/L), SA (0.0138, 0.138, 0.276, 0.552 g/L) and control. Results Twenty-seven essential oils were obtained and the most notable were: α-pinene, limonene, β-pinene, camphor, thymol, camphene, thujone-trans, thujone-cis, 1,8-cineole, borneol, borneol acetate, carvacrol, α-humulene, caryophyllene. JA was more effective in stimulating the accumulation of α-pinene, limonene, β-pinene, camphor, thymol, camphene, thujone-trans, thujone-cis, 1,8-cineole, borneol, borneol acetate, carvacrol, α-humulene and caryophyllene. Conclusion JA and SA had increasing effects on essential oils. The best treatments were found to be JA 0.1051 g/L, JA 0.2102 g/L and SA 0.138 g/L.

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