Maytenus ilicifolia Mart. ex Reissek (Celastraceae), conhecida popularmente por espinheira-santa, é nativa e cultivada, principalmente, no sul do Brasil. Suas folhas apresentam triterpenos e substâncias polifenólicas (flavonóides e taninos) relacionadas ao efeito antiulcerogênico. O objetivo do trabalho foi avaliar a produção de massa seca, altura, ramificação, e o teor de polifenóis totais em plantas de M. ilicifolia que se desenvolveram sob duas condições de luminosidade, após dois tratamentos distintos de poda. O delineamento experimental foi em blocos cazualizados com plantas desenvolvidas sob sombra e a pleno sol, e com plantas manejadas por poda parcial e rasa, com quatro repetições. No tratamento de poda rasa a maior altura das plantas foi observada nas plantas cultivadas a sombra em comparação com as conduzidas a pleno sol. No tratamento de poda parcial o número de ramos terciários aumentou significativamente nas plantas conduzidas a pleno sol. As plantas cultivadas a pleno sol apresentaram diferença significativa na concentração de polifenóis totais em relação às plantas produzidas à sombra alcançando valores de 10,29 ± 0,20% (CV=1,94%) e 7,16 ± 0,09% (CV=1,30%) respectivamente.

The Maytenus ilicifolia Mart. ex Reissek (Celastraceae), traditionally known as "espinheira-santa" in Portuguese, is native and cultivated in South Brazil. Its leaves contain triterpenes and polyphenolic compounds (flavonoids and tannins), which are related to the antiulcerogenic effect. The aim of this work was to evaluate the dried biomass production (g), height (m), ramification, and also the total content in polyphenol compounds of the leaves from the M. ilicifolia specie, which were developed under two different light conditions after two different pruning treatments. The design of the experiment was randomized blocks with two levels of light (shadow or full sunlight) and two levels of prune (partial and drastic), with four replications. The height of the plants grown in the shadow was greater for the treatment of drastic pruning than in plants in full sunlight. The ramification increased significantly with drastic prune in full sunlight. The plants grown in full sunlight showed a significant higher content in total polyphenols than the plants grown in the shadow, 10.29±0.20% (RSD=1.94%) and 7.16±0.09% (RSD=1.30%) respectively.

Este artigo descreve o desenvolvimento e a validação de método espectrofotométrico UV-Visível para quantificação de derivados do ácido o-hidroxicinâmico em folhas de Echinodorus grandiflorus. O método demonstrou ser linear (r² = 0,9974), preciso (DPR < 15%) na análise de matriz complexa e exata (recuperação = 107,56%).

This paper describes the development and the validation of an UV-Vis spectrophotometric method for the quantification of derivatives of o-hydroxycinnamic acid in leaves of Echinodorus grandiflorus. The method showed to be linear (r² = 0.9974), precise (RSD < 15%) in the analysis of complex matrix and accurate (recovery = 107.56%).

Two flavan-3-ols and one proanthocyanidins have been isolated from the stem bark of Stryphnodendron polyphyllum Mart., which is traditionally used in Brazil against various diseases. The structure was determined on the basis of spectroscopic data including 1-D (¹H, 13C) and 2-D NMR (¹H/¹H COSY) and MS. The antibacterial activities of an acetone:water and semipurified extracts from the stem bark of Stryphnodendron polyphyllum Mart. were evaluated. Both the crude and semipurified extracts showed activity against Bacillus subtilis and Staphylococcus aureus. Quality control was determined using several pharmacopoeial assay.