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Propagação vegetativa de Hyptis leucocephala Mart. ex Benth. e Hyptis platanifo...
Oliveira,L.M; Nepomuceno,C.F; Freitas,N.P; Pereira,D.M.S; Silva,G.C; Lucchese,A.MO gênero Hyptis (Lamiaceae) apresenta metabolismo especial de notável variabilidade, possuindo predominância de óleos essenciais, que têm muito valor junto a diversas comunidades que utilizam essas plantas pelas propriedades terapêuticas. Diversos estudos com esse gênero têm demonstrado que os óleos essenciais apresentam propriedades antimicrobiana, antifúngica, citotóxica, antiinflamatória, anti-HIV e insetici...
Phenolics: from chemistry to biology
Pereira, D.M.; Valentão, P.; Pereira, J.A.; Andrade, P.B.In recent years, few classes of natural products have received as much attention as phenolics and polyphenols. This special issue of Molecules, “Phenolics and Polyphenolics”, is a remarkable confirmation of this trend. Several aspects related to phenolics chemistry, comprising the several classes, will be discussed. In addition, the increasing interest in phenolics’ biological activities is covered, and several...
Systemic release of volatiles by Brassica oleracea var. acephala induced by Pie...
Fernandes, F.; Pereira, D.M.; Pinho, P. Guedes de; Valentão, P.; Oliveira, Ivo; Pereira, J.A.; Andrade, P.B.Pieris brassicae is a specialist on crucifers and its interactions with some of its host plants have been increasingly studied given their importance in pest management, chemical ecology and entomology. Plants are known to respond to insect attack by releasing volatiles that can either warn neighbour plants to the presence of a predator or attract insect parasitoids, thus reducing the attack efficiency. The inf...
Multivariate analysis of of Tronchuda Cabbage (Brassica oleracea L. var. costat...
Sousa, C.; Pereira, D.M.; Pereira, J.A.; Rodrigues, M.A.; Bento, Albino; Dopico-García, S.; Lopes, Graciliana; Valentão, P.; Seabra, R.M.; Andrade, P.B.A field experiment was carried out to investigate the effect of fertilization level on the phenolic composition of tronchuda cabbage (Brassica oleracea L. var. costata DC) external and internal leaves. Eight different plots were constituted: a control without fertilization, one with organic matter, and six experiments with conventional fertilizers (nitrogen, boron, and sulfur, two levels each). The phenolic com...
Leucopaxillus giganteus mycelium: effect of nitrogen source on organic acids an...
Pereira, D.M.; Ribeiro, Bárbara; Andrade, P.B.; Baptista, Paula; Barros, Lillian; Ferreira, Isabel C.F.R.; Seabra, R.M.; Valentão, P.ln order to study the influence 01 lour inorganic nitrogen sources (NH4N03, NaN02, KN03 and (NH4)2HP04) on the chemical composition 01 Leucopaxillus giganteus mushroom mycelium, its organic acids profile was determined by HPLC-UV and total alkaloids content was assessed by a spectrophotometric method, alter precipitation by Dragendorlf's reagent. lhe results showed that L. giganteus presented an organic acids p...
In vitro cultures of Brassica oleracea L. Var. Costata DC: potential plant bior...
Taveira, M.; Pereira, D.M.; Andrade, P.B.; Sousa, C.; Ferreres, F.; Martins, Anabela; Pereira, J.A.; Seabra, R.M.; Valentão, P.
Screening of antioxidant compounds during sprouting of Brassica oleracea L. var...
Sousa, C.; Lopes, Graciliana; Pereira, D.M.; Taveira, M.; Valentão, P.; Seabra, R.M.; Pereira, J.A.; Baptista, Paula; Ferreres, F.; Andrade, P.B.The changes in antioxidant compounds of Brassica oleracea L. var. costata DC seeds were monitored during the first twelve days of seedling development. Sprouts were screened at time intervals of two days for phenolic compounds and organic acids. The identified phenolic compounds included esters of sinapic acid with glucose, gentiobiose and kaempferol, as well as sinapoylcholine. The organic acids were oxalic, a...
Phenolic compounds in Brassica oleracea L. var. costata DC: effect of fertiliza...
Dopico-García, S.; Sousa, C.; Lopes, Graciliana; Pereira, D.M.; Pereira, J.A.; Bento, Albino; Rodrigues, M.A.; Valentão, P.; Seabra, R.M.; Andrade, P.B.
Influence of different fertilization regimes on the amounts of organic acids of...
Ribeiro, Bárbara; Sousa, C.; Lopes, Graciliana; Pereira, D.M.; Taveira, M.; Dopico-García, S.; Pereira, J.A.; Bento, Albino; Rodrigues, M.A.
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