Showing papers by "Marcia Ortiz Mayo Marques published in 2023"
TL;DR: In this paper , the authors compared six plant DNA extraction protocols based on the CTAB method and concluded that adding polyvinylpyrrolidone (PVP) into DNA extraction buffers can optimize the DNA extraction of Lippia alba and indicate this protocol for DNA extraction from other aromatic plants.
TL;DR: In this article , the essential oils of the branches of four species were investigated using GC-FID and GC-MS, and their antibacterial activity was also evaluated, and the main constituents were exo-2-norborneol acetate (10.3 ± 0.4), caryophyllene oxide (8.4 ± 0,1%), and (Z,Z)-farnesol (7.2 ± 0.,2%) were predominant in the EO of G. guianensis.
Abstract: Among the Amazonian species of the family Annonaceae, Bocageopsis multiflora (Mart.) R.E. Fr., Guatteria blepharophylla Mart., Guatteria guianensis (Aubl.) R.E. Fr. and Unonopsis guatterioides (A. DC.) R.E. Fr. present promising essencial oils and biological potential. These species, which occur in terra firme forest, have had the essential oils (EOs) from their leaves previously evaluated, but there is a lack of studies regarding their branches (except for the species B. multiflora). Thus, in the present study, the essential oils of the branches of four species were investigated using GC-FID and GC-MS, and their antibacterial activity was also evaluated. In B. multiflora, the main constituents were exo-2-norborneol acetate (10.3 ± 0.4) and ar-curcumene (10.2 ± 0.3%). Ar-curcumene (10.0 ± 0.3%), caryophyllene oxide (8.4 ± 0.1%) and (Z,Z)-farnesol (7.2 ± 0.2%) were predominant in the EO of G. guianensis. Caryophyllene oxide (51.0 ± 0.1%) was the predominant constituent of the essential oil from G. blepharophylla. U. guatterioides showed the phenylpropanoid elemicin (71.7 ± 0.3%) as its main constituent. The EO of G. guianensis showed strong bactericidal activity against Enterococcus faecalis.
TL;DR: The most abundant substances in all populations were vitexin (18 - 1345 ng/g) and chlorogenic acid (60 - 767 ng /g) as discussed by the authors .
Abstract: Lychnophora pinaster, known as arnica-mineira, is endemic to campos rupestres, at risk of extinction. The present study aimed to characterize the ecogeography and phenolic constituents of 11 L. pinaster populations collected in the mesoregions North, Jequitinhonha, Metropolitan of Belo Horizonte and Campos das Vertentes in the state of Minas Gerais, Brazil. Phenolic constituents were identified and quantified by Ultra-high performance liquid chromatography- mass spectrometry. Lychnophora pinaster occurs in sites at high altitude (700 and 1498 m), annual rainfall of up to 1455 m, soils with low fertility and predominantly loamy texture. Therefore, it can be considered tolerant to acidic soils, with low availability of nutrient. The most abundant substances in all populations were vitexin (18 - 1345 ng/g) and chlorogenic acid (60 - 767 ng/g). The 11 populations formed four groups in relation to the phenolic constituents, with group 1 consisting of the populations of the North Mesoregion (GM, OD) and Jetiquinhonha (DIMa), group 2, the Metropolitan of Belo Horizonte (SRM, NLSC, SM, RPS, CTRA), group 3, the North Mesoregion (ODMa and DI), and group 4, the Campos das Vertentes (CC). Among the populations, only those from the Metropolitan of Belo Horizonte showed correlation of soil properties with phenolic constituents.