Chemical composition and antifungal activity of essential oils from Senecio nutans, Senecio viridis, Tagetes terniflora and Aloysia gratissima against toxigenic Aspergillus and Fusarium species

Abstract

Essential oils from aerial parts of Senecio nutans, Senecio viridis, Tagetes terniflora and Aloysia gratissima were analysed by GC-MS and their antifungal activities were assayed on toxigenic Fusarium and Aspergillus species. Sabinene (27.6±0.1%), αphellandrene (15.7±0.3%), o-cymene (9.6±0.2%) and β-pinene (6.1±0.2%) in S. nutans, 9,10-dehydrofukinone (92.7±0.2%) in S. viridis, β-thujone (36.1±0.1%), αthujone (32.2±0.2%), 1,8-cineol (10.7±0.1%) and sabinene (6.2±0.2%) in A. gratissima, and cis-tagetone (33.6±0.2%), cis-β-ocimene (17.1±0.2%), trans-tagetone (17.0±0.1%), cis-ocimenone (8.0±0.2%) and trans-ocimenone (8.2±0.1%) in T.terniflora. The oils showed moderate antifungal activity (1.2 mg/mL > MIC > 0.6 mg/mL) on the Fusarium species and a weak effect on Aspergillus species. The antifungal activity was associated on F. verticillioides to the high content of cistagetone, trans-tagetone, cis-β-ocimene, cis-ocimenone, trans-ocimenone and on F. graminearum due to the total content of oxygenated sesquiterpenes and 9,10dehydrofukinone. The oil of S. viridis synergized the effect of fungicides and food preservatives on F. verticillioides.

Volatilome Analyses and In Vitro Antimicrobial Activity of the Essential Oils from Five South African Helichrysum Species

“…This result was confirmed by the work of Abu-Darwish [ 43 ]. The richness in thujone of this oil could explain its effectiveness against dermatophytes, even though several works reported it was active on both bacteria and fungi [ 44 , 45 ].…”

Essential Oils from Bolivia. XV. Herzogole, an Original Monoterpene Benzodioxole from an Essential Oil from Pentacalia herzogii (Cabrera) Cuatrec

“…Another hydrogen sesquiterpene, α-zingiberene, is also the main constituent of the S. selloi essential oil from Brazil [28]. Dehydrofukinone is by far the most important compound observed in the case of S. viridis from Argentina, since it constitutes more than 92% of the essential oil [29]. This comparison with other closely related species of Asteraceae suggests that the P. herzogii specimens that yielded this essential oil were phytochemically original, based on the high proportions of monoterpenic ethers.…”

“…Another hydrogen sesquiterpene, α-zingiberene, is also the main constituent of the S. selloi essential oil from Brazil [ 28 ]. Dehydrofukinone is by far the most important compound observed in the case of S. viridis from Argentina, since it constitutes more than 92% of the essential oil [ 29 ].…”

Biological Properties of Aloysia gratissima (Gillies & Hook.) Tronc. (Verbenaceae)

“…Galvez et al [ 20 ] reported that the essential oil from the aerial parts of A. gratissima shows moderate antifungal activity against toxigenic Fusarium (MIC = 0.6–1.2 mg/mL) and was mainly inactive against Aspergillus species.…”