Recursos de colección

UTL Repository Universidade Técnica de Lisboa (35.546 recursos)

O Repositório Institucional da Universidade Técnica de Lisboa desenvolvido no âmbito do projecto RCAAP. Este repositório destina-se a recolher, preservar e disponibilizar o acesso às publicações científicas e didácticas de seis: Escolas da UTL: Faculdade de Medicina Veterinária, Instituto Superior de Agronomia, Instituto Superior de Economia e Gestão, Instituto Superior de Ciências Sociais e Políticas , Faculdade de Motricidade Humana, Faculdade de Arquitectura. O Instituto Superior Técnico, igualmente Escola Da UTL, tem repositório independente.

Mostrando recursos 1 - 20 de 59

  1. Ecological and ecotoxicological responses in the assessment of the ecological status of freshwater systems: A case study of the temporary stream Brejo of Cagarrão (South of Portugal)

    Palma, P.; Matos, C.; Alvarenga, P.; Kock-Schulmeyer, M.; Simões, I.; Barceló, D.; López de Alda, M.J.
    The objective of the study was to assess the integrated use of macroinvertebrate indexes and ecotoxicological parameters in the evaluation of the ecological status of a temporary stream with a strong agricultural influence. Water quality was analysed at two sampling sites along the stream, considering: chemical supporting parameters; hazardous substances (pesticides); benthic macroinvertebrate communities, through quality (Iberian Biological Monitoring Working Party and Iberian Average Score Per Taxon) and multi-metric indices (Southern Portuguese Index of Invertebrates and Ecological Quality Ratio); and ecotoxicological responses using lethal and sub-lethal bioassays. The water chemical characterization showed high levels of organic matter and nutrients, mainly in the dry period ((biochemical oxygen demand...

  2. Genetic and genomic tools to assist sugar beet improvment: the value of the crop wild relatives

    Monteiro, Filipa; Frese, Lothar; Castro, Sílvia; Duarte, Maria C.; Paulo, Octávio S.; Loureiro, João; Romeiras, Maria M.
    Perspective

  3. Can elevated air (CO2) conditions mitigate the predicted warming impact on the quality of coffee bean ?

    Ramalho, José C.; Pais, Isabel P.; Leitão, António E.; Guerra, Mauro; Reboredo, Fernando H.; Máguas, Cristina M.; Carvalho, Maria L.; Scotti-Campos, Paula; Ribeiro-Barros, Ana I.; Lidon, Fernando J.C.; DaMatta, Fábio M.
    Original Research

  4. Physiological and agronomical responses to environmental fluctuations of two portuguese grapevine varieties during three field seasons

    Carvalho, Luísa C.; Coito, João L.; Gonçalves, Elsa F.; Lopes, Carlos; Amâncio, Sara
    Extensive agricultural losses are attributed to heat, often combined with drought. These abiotic stresses occur in the field simultaneously, namely in areas with Mediterranean climate, where grapevine traditionally grows. The available scenarios for climate change suggest an increase in the frequency of heat waves and severe drought events in summer, also affecting the South of Portugal. In this work we monitored several productionrelated parameters and evaluated the state of the oxidative stress response apparatus of two grapevine varieties, Touriga Nacional (TN) and Trincadeira (TR), with and without irrigation, during three field seasons (2010 to 2012). Overall, results point to a high correlation of most...

  5. Olive tree (Olea europaea L.) diversity in traditional small farms of Ficalho, Portugal

    Veloso, Maria Manuela; Simões-Costa, Maria Cristina; Carneiro, Luís C.; Guimarães, Joana B.; Mateus, Célia; Fevereiro, Pedro; Pinto-Ricardo, Cândido
    The genetic diversity of “Gama” and “Bico de Corvo”, local cultivars of olive tree (Olea europaea) from seven traditional orchards of Ficalho (Alentejo region, Portugal), was studied to characterize the local diversity and assess the level of on farm diversity. Two different analytical systems were used: endocarp morphological characteristics and genetic analysis by microsatellite markers (Simple Sequence Repeats or SSR). The seven screened loci were polymorphic and allowed the identification of 23 distinct SSR profiles within the 27 trees analyzed. A total of 52 different alleles were scored, with an average of 7.43 alleles/SSR locus, and considerable genetic diversity was found. Neighbor-Joining algorithm cluster analysis and principal...

  6. Fusion proteins towards fungi and bacteria in plant protection

    Pinheiro, Ana Margarida; Carreira, Alexandra; Ferreira, Ricardo B.; Monteiro, Sara
    Research Article

  7. Basin irrigation design with multi-criteria analysis focusing on water saving and economic returns: application to wheat in Hetao, Yellow River basin

    Miao, Quingfeng; Shi, Haibin; Gonçalves, José M.; Pereira, L.S.
    The sustainability of the Hetao Irrigation System, located in the water scarce upper Yellow River basin, is a priority considering the need for water saving, increased water productivity, and higher farmers’ incomes. The upgrading of basin irrigation, the main irrigation method, is essential and includes the adoption of precise land levelling, cut-off management, improved water distribution uniformity, and adequate irrigation scheduling. With this objective, the current study focuses on upgrading wheat basin irrigation through improved design using a decision support system (DSS) model, which considers land parcels characteristics, crop irrigation scheduling, soil infiltration, hydraulic simulation, and environmental and economic impacts. Its use includes outlining water saving scenarios and...

  8. Phylogenetic relationships and phylogeography of relevant lineages within the complex Campanulaceae family in Macaronesia

    Menezes, Tiago; Romeiras, Maria M.; Sequeira, Miguel M.; Moura, Mónica
    Original Research

  9. Comparative metagenomics reveals the distinctive adaptive features of the Spongia officinalis endosymbiotic consortium

    Karimi, Elham; Ramos, Miguel; Gonçalves, Jorge M.S.; Xavier, Joana R.; Reis, Margarida P. Reis; Costa, Rodrigo
    Original Research

  10. Characterization of the primary matabolome of Brachystegia boehmii and Colophospermum mopane under different fire regimes in Miombo and Mopane African woodlands

    Duvane, Jossias A.; Jorge, Tiago F.; Maquia, Ivete; Ribeiro, Natasha; Ribeiro-Barros, Ana I.F.; António, Carla
    Original Research

  11. Durum wheat diversity for heat stress tolerance during inflorescence emergence is correlated to TdHSP101C expression in early developmental stages

    Bento, Miguel; Pereira, Sónia Gomes; Viegas, Wanda; Silva, Manuela
    Research article

  12. Gestão de infestantes em vinhas, olivais e pomares

    Portugal, João; Monteiro, Ana; Luz, João Pedro
    A implementação de culturas perenes, em Portugal, sofreu nas últimas décadas grandes alterações quer na instalação da cultura quer nas técnicas de gestão. Este artigo revê a gestão das infestantes nas principais culturas perenes em Portugal, o que se julga pertinente dado que se tem verificado a implementação de sistemas de modo de produção biológica (MPB) e de produção integrada (MProdi). Por infestante, os autores, consideram as populações de uma dada espécie vegetal que acima de determinados níveis e sob condicionalismos ecológicos particulares sejam responsáveis por prejuízos “líquidos” (balanço benefícios-prejuízos negativo) inaceitáveis em termos económicos e/ou ecológicos ou sociais. Primeiramente, apresentam-se os dados de 2015 relativamente...

  13. Leaf phytognostic characters of six species of Hypericum L. (Hypericaceae)

    Teixeira, Generosa; Monteiro, Ana
    Most of the studies on Hypericum genus deals with the phytochemical and pharmacological properties and the morphoanatomical data are scarce, although sometimes some species are poorly identified. In order to obtain differentiating phytognostic characters, the micromorphological, anatomical and histochemical study of mature leaves of six Hypericum species, H. androsaemum, H. calycinum, H. canariense, H. grandifolium, H. x inodorum and H. patulum, was carried out using different techniques of microscopy. Qualitative characters of both epidermal surfaces were evaluated: cell shape, cell wall, epicuticular deposits and stomata type. Only the last three characters showed some kind of differences. Five qualitative characters, stomata and gland indexes, total mesophyll thickness, palisade...

  14. Deep analysis of wild Vitis flower transcriptome reveals unexplored genome regions associated with sex specification

    Ramos, Miguel Jesus Nunes; Coito, João Lucas; Fino, Joana; Cunha, Jorge; Silva, Helena; Almeida, Patrícia Gomes; Costa, Maria Manuela Ribeiro; Amâncio, Sara; Paulo, Octávio S.; Rocheta, Margarida
    Key message RNA-seq of Vitis during early stages of bud development, in male, female and hermaphrodite flowers, identified new loci outside of annotated gene models, suggesting their involvement in sex establishment. Abstract The molecular mechanisms responsible for flower sex specification remain unclear for most plant species. In the case of V. vinifera ssp. vinifera, it is not fully understood what determines hermaphroditism in the domesticated subspecies and male or female flowers in wild dioecious relatives (Vitis vinifera ssp. sylvestris). Here, we describe a de novo assembly of the transcriptome of three flower developmental stages from the three Vitis vinifera flower types. The validation of de novo assembly showed a correlation of 0.825....

  15. Design of a custom RT-qPCR array for assignement of abiotic stress tolerance in traditional portuguese grapevine varieties

    Carvalho, Luísa C.; Silva, Marilia; Coito, João L.; Rocheta, Margarida P.; Amâncio, Sara
    Original Research

  16. Mapping the Lisbon potential foodshed in Ribatejo e Oeste: a suitability and yeld model for assessing the potential for localized food production

    Cardoso, Andreia Saavedra; Domingos, Tiago; Magalhães, Manuela Raposo; Melo-Abreu, José Paulo; Palma, Jorge
    Article

  17. The Colletotrichum acutatum species complex as a model system to study evolution and host specialization in plant pathogens

    Baroncelli, Riccardo; Talhinhas, Pedro; Pensec, Flora; Sukno, Serenella A.; Le Floch, Gaetan; Thon, Michael R.
    Perspective

  18. Guia da excursão geobotânica à Ilha do Fogo

    Costa, José Carlos; Neto, Carlos; Romeiras, Maria; Dinis, Herculano; Duarte, Maria Cristina; Capelo, Jorge; Rivas-Martinez, Salvador
    A ilha do Fogo é a mais elevada do arquipélago de Cabo Verde. Biogeograficamente situa-se no reino Paleotropical, sub-reino Afrotropical, região Saara-Tropical, província Cabo Verde, sector Cabo Verde Sul e distrito Fogo. Este trabalho apresentamos o clima e o bioclima (varia entre tropical desértico eu-hiperoceânico infratropical hiperárido e tropical pluviestacional eu-hiperoceânico supratropical sub-húmido) da ilha do Fogo. Referem-se as 18 associações e 1 comunidade assinaladas distribuídas por 13 alianças, 11 ordens e 10 classes, por fim referese o catálogo florístico com 788 taxa.--------------------------------------------------------------------ABSTRACT: The Fogo Santiago Island is the one that reaches the highest altitude of the 10 islands of the Cabo Verde archipelago. Biogeographically is located...

  19. Guia da excursão geobotânica à Ilha de Santiago

    Costa, José Carlos; Capelo, Jorge; Neto, Carlos; Duarte, Cristina; Vitória, Sónia; Romeiras, Maria; Rivas-Martinez, Salvador
    A ilha de Santiago a maior do Arquipélago de Cabo Verde, situa-se no reino Paleotropical, sub-reino Afrotropical, região Saara-Tropical, província Cabo Verde, sector Cabo Verde Sul e distrito Santiago, cujo bioclima varia entre tropical desértico eu-hiperoceânico infratropical árido e tropical xérico ultra-hiperoceânico termotropical seco. Neste trabalho apresentam-se 17 associações que ocorrem nesta ilha, distribuídas por 13 alianças, 11 ordens e 10 classes, bem como o catálogo florístico com 901 taxa.-------------------------------------ABSTRACT: The island of Santiago is the largest of the 10 islands of the Cape Verde. It is located in the Paleotropical kingdom, Afrotropical sub-kingdom, Saaro-Tropical region, Cape Verde province, South Cape Verde sector, Santiago district. Bioclimate of...

  20. How depletion in mineral major elements affects grapevine (Vitis vinifera L.) primary cell wall

    Goulão, Luís F.; Fernandes, João C.; Amâncio, Sara
    The noteworthy fine remodeling that plant cell walls (CWs) undergo to adapt to developmental, physiological and environmental cues and the observation that its composition and dynamics differ between species represents an opportunity to couple crop species agronomic studies with research on CW modifications. Vitis vinifera is one of the most important crops from an economic point-of-view due to the high value of the fruit, predominantly for winemaking. The availability of some information related to this species’ CWs allows researching its responses to imposed conditions that affect the plant’s development. Mineral deficiency, in particular nitrogen, phosphorus, potassium and sulfur, strongly affects plant metabolism, reducing both growth and crop yield. Despite...

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