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1.
Biomolecules ; 10(8)2020 08 06.
Artigo em Inglês | MEDLINE | ID: mdl-32781744

RESUMO

The Eugenia and Syzygium genera include approximately 1000 and 1800 species, respectively, and both belong to the Myrtaceae. Their species present economic and medicinal importance and pharmacological properties. Due to their chemical diversity and biological activity, we are reporting the essential oils of 48 species of these two genera, which grow in South America and found mainly in Brazil. Chemically, a total of 127 oil samples have been described and displayed a higher intraspecific and interspecific diversity for both Eugenia spp. and Syzygium spp., according to the site of collection or seasonality. The main volatile compounds were sesquiterpene hydrocarbons and oxygenated sesquiterpenes, mainly with caryophyllane and germacrane skeletons and monoterpenes of mostly the pinane type. The oils presented many biological activities, especially antimicrobial (antifungal and antibacterial), anticholinesterase, anticancer (breast, gastric, melanoma, prostate), antiprotozoal (Leishmania spp.), antioxidant, acaricidal, antinociceptive and anti-inflammatory. These studies can contribute to the rational and economic exploration of Eugenia and Syzygium species once they have been identified as potent natural and alternative sources to the production of new herbal medicines.


Assuntos
Anti-Infecciosos/química , Antioxidantes/química , Eugenia/química , Óleos Voláteis/química , Óleos Vegetais/química , Syzygium/química , Anti-Infecciosos/farmacologia , Antioxidantes/farmacologia , Óleos Voláteis/farmacologia , Óleos Vegetais/farmacologia
2.
Int J Mol Sci ; 18(12)2017 Dec 07.
Artigo em Inglês | MEDLINE | ID: mdl-29215548

RESUMO

Bragantina and Cingapura are the main black pepper (Piper nigrum L.) cultivars and the Pará state is the largest producer in Brazil with about 90% of national production, representing the third largest production in the world. The infection of Fusarium solani f. sp. piperis, the causal agent of Fusarium disease in black pepper, was monitored on the cultivars Bragantina (susceptible) and Cingapura (tolerant), during 45 days' post infection (dpi). Gas Chromatography-Mass spectrometry (GC-MS) analysis of the volatile concentrates of both cultivars showed that the Bragantina responded with the production of higher contents of α-bisabolol at 21 dpi and a decrease of elemol, mostly at 30 dpi; while Cingapura displayed an decrease of δ-elemene production, except at 15 dpi. The phenolic content determined by the Folin Ciocalteu method showed an increase in the leaves of plants inoculated at 7 dpi (Bragantina) and 7-15 dpi (Cingapura); in the roots, the infection caused a phenolic content decrease in Bragantina cultivar at 45 dpi and an increase in the Cingapura cultivar at 15, 30 and 45 dpi. High Performance Liquid Chromatography-Mass spectrometry (HPLC-MS) analysis of the root extracts showed a qualitative variation of alkamides during infection. The results indicated that there is a possible relationship between secondary metabolites and tolerance against phytopathogens.


Assuntos
Resistência à Doença , Metaboloma , Piper nigrum/metabolismo , Fusarium/patogenicidade , Sesquiterpenos Monocíclicos , Óleos Voláteis/metabolismo , Piper nigrum/genética , Piper nigrum/microbiologia , Folhas de Planta/metabolismo , Folhas de Planta/microbiologia , Sesquiterpenos/metabolismo
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