Encontrados 38 documentos, a visualizar página 1 de 4
Micropropagation of a recalcitrant pine (Pinus pinea L.): An overview of the ef...
Ragonezi, C.; Caldeira, A.T.; Martins, M.R.; Teixeira, D.; Dias, L.S.; Miralto, O.; Ganhão, E.; Klimaszewska, K.; Zavattieri, A.Stone pine (Pinus pinea L.) is an economically important forest species in some regions of Iberian Peninsula. Portugal and Spain have nearly 500,000 ha of stone pine stands, representing 85% of worldwide distribution. The main use of this species is for the production of seeds (pinion) for food industry. In addition to its enormous profitability as a producer of seeds, it has beneficial impact on soil protectio...
Self-affinity, self-similarity and disturbance of soil seed banks by tillage
Dias, L.S.Soil seed banks were sampled in undisturbed soil and after soil had been disturbed by tillage (tine, harrow or plough). Seeds were sorted by size and shape, and counted. Size-number distributions were fitted by power law equations that allowed the identification of self-similarity and self-affinity. Self-affinity and thus non-random size-number distribution prevailed in undisturbed soil. Self-similarity and thu...
Constant and alternating temperature effects on germination and early growth of...
Dias, A.S.; Dias, L.S.; Pereira, I.P.Scorzonera is a threatened species in Portugal. Given the role of temperature in germination and seedling recruitment, the performance of total germination, lag of germination, duration of germination, shape of germination, root and hypocotyl length, and relative root growth of scorzonera was investigated under constant and alternating temperatures between 10 and 25ºC. Because of scorzonera’s rarity and threate...
Caracterização, classificação e discriminação de doentes atendidos no serviço d...
Cavaco, M.; Dias, L.S.; Fernández-Llimós, F.Resultados Clínicos Negativos da Farmacoterapia (RCNF) como motivo de atendimento em Serviços de Urgência foram investigados através de um questionário semi-fechado. As respostas foram analisadas por análise das correspondências e classificação hierárquica. Identificaram-se três grupos de doentes com RCNF, um essencialmente de sobrerrepresentação de necessidade de medicamentos, outro essencialmente com sobrerre...
Extending the range for accurate estimation of seed volume from incomplete line...
Dias, L.S.; Ganhão, E.Seed volume estimated from seed length and width alone using a published equation was compared with seed volume data for 690 species. Although the published equation holds far beyond the data range for which it was fitted, it could not provide accurate estimates for the whole range of seed volume abstracted from literature. Therefore a new equation was fitted implying a system of two equations to accurately est...
Deficiências minerais em Scorzonera hispanica. Sintomas e efeitos no crescimento
Dias, A.S.; Pereira, I.P.; Dias, L.S.A escorcioneira (Scorzonera hispanica L.), de ocorrência espontânea na Península Ibérica, é cultivada pela sua raiz tuberosa. Com o objectivo de tipificar sintomas de deficiências minerais em escorcioneira cultivaram-se plântulas em diferentes soluções nutritivas durante 15 dias, estudando-se o crescimento e produção de biomassa aérea e radicular. Uma solução nutritiva completa serviu de referência, consistindo...
Pisolithus arhizus (Scop.) Rauschert improves growth of adventitious roots and ...
Ragonezi, C.; Caldeira, A.T.; Martins, M.R.; Dias, L.S.; Santos-Silva, C.; Ganhão, E.; Miralto, O.; Pereira, I.; Louro, R.; Klimaszewska, K.Stone pine (Pinus pinea L.) is an economically important forest tree in the Mediterranean region and has been the target of breeding and selection through micropropagation mainly for its ecological and ornamental aspects. A crucial step in micropropagation is adventitious rooting of microshoots, which often is highly inefficient in most conifer species including stone pine. Hence, we conducted in vitro co-cultu...
Bioassays against pinewood nematode: assessment of a suitable dilution agent an...
Barbosa, P.; Faria, J.M.S.; Mendes, M.D.; Dias, L.S.; Tinoco, M.T.; Barroso, J.G.; Pedro, L.G.; Figueiredo, A.C.; Mota, M.Acetone was investigated and found to be an appropriate alternative to Triton X-100 as a solvent of essential oils in bioassays aimed to investigate their effects on pinewood nematode (Bursaphelenchus xylophilus) mortality. Therefore it was used as dilution agent to screen the effectiveness of fifty two essential oils against this pest. Thirteen essential oils were highly effective, resulting in more than 90% p...
Porque «Uma língua é o lugar donde se vê o mundo» - Considerações sobre a forma...
Dias, L.S.; Dias, A.S.Conforme um dia afirmou Vergílio Ferreira, «Uma língua é o lugar donde se vê o mundo e de ser nela pensamento e sensibilidade». Nessa medida, a palavra usada para designar uma entidade natural tão importante como é a árvore e em particular a árvore de fruto, não pode deixar de ser importante. Da mesma forma, o género da palavra usada para «árvore» é particularmente significativo no âmbito da representação e lei...
Herbs and spices in traditional Portuguese culinary: A preliminary picture
Dias, A.S.; Dias, L.S.Aromatic plants of intense smell and taste known as herbs or spices are used worldwide and seem to be present as essential flavouring elements in almost all culinary traditions of settled people and also in nomadic herdsmen cultures. Nowadays the use of aromatic plants in national or regional characteristic culinary becomes in many places an auto-perpetuated traditional trait based on a culturally made taste. T...
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