Antifungal activity of the essential oils of plectranthus neochilus (Lamiaceae) and tagetes erecta (Asteraceae) cultivated in brazil

Abstract

The herbaceous and aromatic plant Plectranthus neochilus is popularly known as "boldo-rasteiro" in Brazil. 16 The essential oil of P. neochilus displays antimicrobial, 17 antischistosomal, 16 and insecticidal, 18 activities. On the other hand, Tagetes erecta L., commonly known as "marigold" in many countries and as "cravo-dedefunto" in Brazil, is an annual aromatic and branched herb native to Mexico. The essential oil from its leaves is utilized as antihelminthic in the Amazonia region. 19 Despite the different reported biological activities of these plants, the antifungal effects of its essential oil have not yet been investigated. Thus, as part of our ongoing interest in the biological activities of essential oils, in this work, we now report the chemical composition and the antifungal activity in vitro against fungi that cause dermatomycoses and aspergillosis of the essential oils obtained from leaves of P. neochilus (PN-EO) and T. erecta (TE-EO) grown in Brazil.

Screening of Chemical Characterization, Antifungal and Cytotoxic Activities of Essential Oil Constituents of <i>Tagetes erecta</i> L. from Erbil, Kurdistan Region-Iraq

“…The second major class of compounds in both parts were sesquiterpenoids, with percentages of 22% and 20% respectively, from which (E)caryophyllene (5.92%, 7.72%), caryophyllene oxide (4%, 2.87%), (E)-myroxide (3.57%, 5.41%), and spathulenol (1.31%, 1.78%) were the most abundant consecutively. The results have shown similarity with the composition reported by Marques, Morais [4], Oliveira, Alves [7], Laosinwattana, Wichittrakarn [8], Crevelin [15], Resmi, and Nair [16], who emphasized that the monoterpenes are the predominant components of the aerial parts of T. erecta ranging between (46.3% to 97.3%), besides some variation in major and minor compounds occurred. Furthermore, major compounds such as methyleugenol (E)-ocimene, undacane, piperitenone oxide, l-limonene, cis-ocimene, (E)-ocimene, limonene, (Z)-myroxide, camphene, α-terpinolene, α-thujene, 1,4-naptoquinone, 2-hexyl-1-decanol, fenchol, eugenol, and 4-terpinyl acetate isolated by Tripathi, Bhatia [5], Oliveira, Alves [7], Crevelin [15], Resmi, Nair [16], Yasheshwar, and Umar [17] were not found in our analysis.…”

LC-MS Characterization and Biological Activities of Cuban Cultivars of Plectranthus neochilus Schltr

“…Overall, our results showing moderate antimicrobial activity of Cuban cultivars of P. neochilus are in full agreement with the Cuban ethnobotanical information, in contrast to reports on P. neochilus species grown elsewhere. Most of the information available from the species under study is related to essential oil production and its association with antimicrobial activity [ 6 , 8 , 9 , 16 , 39 ]. In particular, the 2014 article by Mota et al [ 8 ] demonstrated significant antimicrobial activity on two bacterial strains, S. aureus and E. coli , included in our study.…”