Helichrysum araxinum Takht. ex Kirp. grown in Italy: volatiloma composition and in vitro antimicrobial activity

Abstract

<jats:title>Abstract</jats:title><jats:p>In the present work the composition of biogenic volatile organic compounds (BVOCs) and the essential oil (EO) of <jats:italic>Helichrysum araxinum</jats:italic> Takht. ex Kirp. aerial parts, together with the antimicrobial activity, were investigated. The results showed the prevalence of sesquiterpene hydrocarbons in both spontaneous emissions as well as in the EO. The main compounds of BVOCs were γ-curcumene (10.7%), γ-muurolene (9.2%), and β-selinene (8.5%). This latter constituent also showed a similar amount in the EO and represented the most abundant compounds together with α-selinene (8.0%). It is Interesting to note the same percentage of monoterpene hydrocarbons (MHs) in both the aroma profile and the EO (18.0%) with the same most abundant compounds: β-pinene (6.3% in BVOCs vs. 5.1% in EO, respectively) and limonene (4.5% in VOCs vs. 4.9% in EO, respectively). With regard to the antimycotic activity, the EO showed to be inactive against the tested strains, while a moderate antibacterial activity was shown against <jats:italic>Staphylococcus</jats:italic> isolates.</jats:p>

Use of Essential Oils in Veterinary Medicine to Combat Bacterial and Fungal Infections

“…Canine clinical isolates of S. aureus and S. pseudointermedius were shown to be quite sensitive also to Helichrysum pandurifolium , H. trilineatum , and H. araxinum [ 55 , 56 ].…”

“…Feline clinical isolates of M. canis and T. mentagrophytes were shown to be susceptible to H. pandurifolium EO (0.25% and 0.5%, respectively), to H . edwardsii (0.25% and 1%), and to H cooperi (0.5% and 1%), while H. odoratissimum , and H. trilineatum were less effective [ 55 ], and H. italicum and H. araxinum appeared quite uneffective [ 56 , 100 ].…”

Volatolomics of Three South African Helichrysum Species Grown in Pot under Protected Environment

“…γ-Curcumene (10.75) and β- (8.5%) and α-selinene (7.3%) were also the main compounds found in the spontaneous emission of H. araxinum Takht. ex Kirp, which in fact had SH as the most representative chemical class (79.5%) [ 2 ].…”

“…The genus Helichrysum , belonging to the family Asteraceae, comprises more than 500 species, of which almost half are indigenous to South Africa [ 1 , 2 , 3 ]. Different species of Helichrysum are widely used in the traditional local medicine, thanks to the variety of secondary metabolites that the plants belonging to this genus can produce [ 3 ].…”

“…It was observed that both the different morphological characters of the plants and the chemotypes of their EOs are attributable to the genetic heritage as well, and therefore the chemical composition can be used for the taxonomic identification [ 8 ]. In the last decades, it is no coincidence that the essential oils obtained from different species of this genus received increasing interest, for both their chemical composition and their biological activities [ 2 , 7 , 9 ].…”