Publications by authors named "George A de Queiroz"
Background: The Atlantic Forest is one of the most diverse and threatened phytogeographical domains in the world. Despite that, it includes regions with poor floristic knowledge, even in protected areas. Although the importance of protected areas in conserving the Atlantic Forest hotspot is undisputed, it is necessary to recognise the floristic richness of these areas to propose effective conservation actions.
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- The study analyzes the essential oil (EO) composition of Kunth, a Brazilian shrub, examining different plant parts (roots, stems, branches, and leaves) and their developmental phases.
- Results showed significant variations in EO yield and chemical diversity, with leaves exhibiting the highest diversity and key compounds like α-pinene and β-pinene, while roots and stems had more arylpropanoids like apiol.
- The findings highlight the importance of plant maturity and part ontogeny in ecological adaptations and potential applications in medicine and agriculture, enhancing understanding of Piperaceae chemodiversity.
Article Synopsis
- *Chemical analysis has revealed a variety of beneficial compounds, and extracts have demonstrated antibacterial, antifungal, and larvicidal properties.
- *This study is the first to investigate the bioactive compounds in extracts from L. grown in agroecological conditions, identifying 83 compounds and highlighting the potential of its ethyl acetate partition for therapeutic applications.*
The aim of this study was to monitor the volatile chemical composition from leaves and reproductive organs of Kunth (PM), in its reproduction period, as well as register inflorescence visitors, microclimate and phenological information. The essential oils (EOs) obtained from the different fresh organs by hydrodistillation were identified and quantified by Gas Chromatography/Mass Spectrometry (GC/MS) and by GC coupled to a Flame Ionization Detector (GC/FID), respectively. The cercentage content of some volatiles present in reproductive organs, such as limonene, 1,8-cineole, linalool and eupatoriochromene, increased during the maturation period of the inflorescences, and decreased during the fruiting period, suggesting a defense/attraction activities.
View Article and Find Full Text PDFPhenoplasticity of Essential Oils from Two Species of (Piperaceae): Comparing Wild Specimens and Bi-Generational Monoclonal Cultivars.
Plants (Basel)
July 2022
This study tested the hypothesis that "clonal chemical heritability is a crucial factor for the conservation of chemical uniformity of essential oils in controlled monoclonal cultivation". We asexually propagated first and second-generation clones of two medicinal and aromatic species, Kunth and Kunth (Piperaceae), for use as experimental models since they show high chemical plasticity in the wild. Leaves from wild specimens of both species, and their respective cultivated specimens, were hydrodistilled in a Clevenger-type apparatus to produce essential oils (EOs).
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