| Texto completo | |
| Autor(es): |
Lopes, Leandra Gobira
[1]
;
Tavares, Gabriela Lopes
[1]
;
Thomaz, Luciana Dias
[2]
;
Sabino, Jose Ricardo
[3]
;
Borges, Keyller Bastos
[4]
;
Vieira, Paulo Cezar
[5]
;
Moura Veiga, Thiago Andre
[6]
;
Borges, Warley de Souza
[1]
Número total de Autores: 8
|
| Afiliação do(s) autor(es): | [1] Univ Fed Espirito Santo, Dept Chem, BR-29060700 Vitoria, ES - Brazil
[2] Univ Fed Espirito Santo, Dept Biol, BR-29060700 Vitoria, ES - Brazil
[3] Univ Fed Goias, Inst Phys, BR-74000970 Goiania, Go - Brazil
[4] Univ Fed Sao Joao del Rei, Dept Nat Sci, BR-36307066 Sao Joao Del Rei, MG - Brazil
[5] Univ Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil
[6] Inst Environm Sci Chem & Pharmaceut, BR-09972270 Diadema, SP - Brazil
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CHEMISTRY & BIODIVERSITY; v. 13, n. 3, p. 284-292, MAR 2016. |
| Citações Web of Science: | 0 |
| Resumo | |
A phytochemical study of Pavonia multiflora A. St-Hil. (Malvaceae) led to the isolation through chromatographic techniques of 10 secondary metabolites: vanillic acid (1), ferulic acid (2), p-hydroxybenzoic acid (3), p-coumaric acid (4), loliolide (5), vomifoliol (6), 4,5-dihydroblumenol A (7), 3-oxo--ionol (9), blumenol C (10), and taraxerol 4-methoxybenzoate (8), the latter being a novel metabolite. Their structures were identified by H-1- and C-13-NMR, using one- and two-dimensional techniques, and X-ray crystallography. In this work, we report the effect of compounds 5 and 8 on several photosynthetic activities in an attempt to search for new compounds as potential herbicide agents that affect photosynthesis. Both compounds inhibited the electron flow from H2O to methyl viologen; therefore, they act as Hill reaction inhibitors. Using polarographic techniques and studies of the fluorescence of chlorophyll a, the interaction sites of these compounds were located at photosystem II. (AU) | |
| Processo FAPESP: | 10/52326-9 - Estudo de produtos naturais oriundos de plantas do cerrado e mata atlantica: conhecimento quimico-biologico aliado a preservacao (sisbiota) |
| Beneficiário: | Paulo Cézar Vieira |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa BIOTA - Regular |