Encontrados 11 documentos, a visualizar página 1 de 2
Desertification in Portugal: causes, consequences and possible solutions
Branco, João; Oliveira, Márcia; Ferreira, Ricardo; Póvoa, OrlandaAlthough desertification is not a new problem, world-wide population awareness is increasing. This problem has a greater impact in developing countries, where subsistence agriculture leads to very serious consequences as famine and sub-nutrition. However, desertification also affects the developed ones, because of, among other factors, unsustainable practices in the Agriculture and Forestry sectors combined wit...
Deforestation in Portugal: causes, consequences and possible solutions
Branco, João; Oliveira, Márcia; Ferreira, Ricardo; Póvoa, OrlandaDeforestation is not a new problem although world-wide population awareness is increasing. This issue has terrible environmental, social and economic consequences due to the over-exploitation of the natural resources and to alternative land uses which are more profitable in the short term. The combat and mitigation of deforestation is one of the biggest challenges for the 21st Century in order to achieve the Mi...
Trichomes micromorphology and essential oil variation at different developmenta...
Rodrigues, Leandra; Póvoa, Orlanda; Teixeira, Generosa; Figueiredo, Ana Cristina; Moldão, Margarida; Monteiro, AnaThe indumentum of Mentha pulegium L., studied by light and scanning electron microscopy, was characterized by non-glandular and glandular trichomes, which corresponded to the common arrangement described for the Lamiaceae family. Histochemistry revealed the presence of pectins, total lipids, acidic lipids and essential oils in the glandular trichomes secretions. The essential oil yield ranged from 0.3% (w/d.w.)...
Genetic diversity in Mentha cervina based on morphological traits, essential oi...
Rodrigues, Leandra; Póvoa, Orlanda; Berg, Cássio Van den; Figueiredo, Ana Cristina; Moldão-Martins, Margarida; Monteiro, AnaMorphological, phytochemical and genetic differences were studied to evaluate the level and distribution of diversity in twelve populations of the Portuguese endangered medicinal plant Mentha cervina L. Morphological variation was correlated with ecological conditions at the site of origin. Pulegone was the major essential oils compound in all of the populations collected at full flowering (68–83%), in differen...
Low genetic diversity and significant structuring in the endangered Mentha cerv...
Rodrigues, Leandra; Berg, Cássio Van den; Póvoa, Orlanda; Monteiro, AnaEighteen populations of the endangered aromatic and medicinal plant Mentha cervina (Lamiaceae) were sampled across its natural range, in the western half of the Iberian Peninsula, and inter-simple sequence repeats (ISSRs) markers were used to assess genetic diversity and population structure. M. cervina populations exhibited a relatively low genetic diversity (percentage of polymorphic loci PPB ¼ 14.2–58.3%, Ne...
Levantamento etnobotânico sobre coentros e poejos no Alentejo
Póvoa, Orlanda; Farinha, Noémia; Dias, Susana SaraivaO coentro (Coriandrum sativum L.), o poejo (Mentha pulegium L.) e o poejo fino (Mentha cervina) são frequentemente utilizados na cozinha tradicional alentejana, imprimindo-lhes um toque distintivo comparativamente à cozinha tradicional das restantes regiões portuguesas. Foi efectuado um levantamento etnobotânico da utilização medicinal e condimentar destes três taxa com base em 67 entrevistas semi-estruturadas ...
Levantamento de etnobotânica aplicada à veterinária na região Alentejo
Farinha, Noémia; Póvoa, OrlandaA utilização tradicional de plantas para o tratamento de afecções animais é importante pelas suas potencialidades de utilização em pastagens medicinais, no desenvolvimento potencial de novas formulações farmacêuticas veterinárias para agricultura biológica e na preservação e valorização do conhecimento tradicional do Alentejo. Foi efetuado um levantamento etnobotânico para aplicação no tratamento de animais, na...
Desertificação em Portugal: causas, consequências e possíveis soluções
Branco, João; Oliveira, Márcia; Ferreira, Ricardo; Póvoa, OrlandaAlthough desertification is not a new problem, world-wide population awareness is increasing. This problem has a greater impact in developing countries, where subsistence agriculture leads to very serious consequences as famine and sub-nutrition. However, desertification also affects the developed ones, because of, among other factors, unsustainable practices in the Agriculture and Forestry sectors combined wit...
Pastagens medicinais. Avaliação da capacidade germinativa de diferentes populaç...
Póvoa, Orlanda; Farinha, Noémia; Generoso, VandaCom o objectivo de contribuir para o conhecimento da biologia reprodutiva da margarida (Bellis perennis e Bellis sylvestris), fez-se um estudo preliminar da capacidade germinativa de acessions silvestres destes taxa colhidos no Alentejo e Extremadura espanhola. O tratamento para quebra de dormência das sementes foi a pré-refrigeração a 5ºC durante 7 dias e um control. A temperatura de incubação foi de 20 ºC e t...
Morphology of secretory structures and essential oil composition in Mentha cerv...
Rodrigues, Leandra; Monteiro, Patricia; Póvoa, Orlanda; Teixeira, Generosa; Moldão-Martins, Margarida; Figueiredo, Ana Cristina; Monteiro, AnaABSTRACT: Mentha cervina L. is an aromatic plant that is traditionally used in the Alentejo region of Portugal to flavour food dishes and for the medicinal properties of the essential oil produced in its glandular trichomes. The morphology and distribution of the secretory structures of 20 populations was studied by light and scanning electron microscopy and revealed a great similarity in the type and distribut...
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