30 documents found, page 1 of 3
Host plant response to the application of nematocidal phytochemicals
Barbosa, Pedro; Machado, Rui; Coelho, Renato; Figueiredo, A. C.; Mota, Manuel; Vicente, Cláudia S. L.Potato (Solanum tuberosum) is one of the world’s most common agricultural crop for human consumption and considered an excellent source of essential nutrients and vitamins. The productivity of this crop is threatened by several plant-parasitic nematodes, among which the root-lesion nematode Pratylenchus penetrans is already considered to have a significant impact. Over the years, due to an increasing need of fo...
Relações Solo-Água-Planta
Santos, Francisco; Alexandre, Carlos; Coelho, RenatoO interesse nas relações solo-água-planta decorre do facto de constituírem conhecimento essencial e suporte indispensável para aplicações em áreas tão diversas e tradicionais como a agricultura, biologia, hidrologia e hidrogeologia, engenharia dos recursos hídricos e engenharia do ambiente, estendendo-se a outras áreas como a bioremediação e o controlo de solutos e poluentes no solo e nas águas. O capítulo abor...
Terroir influence on quality of ‘Crimson’ table grapes
Ricardo-Rodrigues, Sara; Laranjo, Marta; Coelho, Renato; Martins, Patrícia; Rato, Ana Elisa; Vaz, Margarida; Valverde, Pedro; Shahidian, ShakibThe terroir concept can be defined as the effect on food sensory features of the uniqueness of the place, which gives food products a particular taste, mainly due to soil and climate characteristics. The aim of the present study was to understand the relationship between the physiological behaviour of vineyards, soil characteristics and final quality of ‘Crimson’ table grapes. Soluble Solids Content (SSC) and t...
MOOC as a way to raise inclusion awareness in society: Portuguese case study
Francisco, Manuela; Filipe, Luís; Cadima, Rita Alexandra Cainço Dias; Sousa, Célia; Mangas, Catarina; Seco, Graça; Alves, Sandra; Coelho, RenatoThe inclusion of people with some kind of limitation or disability in different daily contexts has been one of the mottoes of our modern society, as a result of the changes experienced over the last decades. Education is a clear example of these contexts and institutions must support students with special educational needs (SEN). This support includes physical and digital accessibility, interaction with peers, ...
Efeito do quitosano e ácido acético na conservação de uva de mesa
Ricardo-Rodrigues, Sara; Laranjo, Marta; Martins, Patrícia; Rato, Ana Elisa; Shahidian, Shakib; Vaz, Margarida; Coelho, Renato; Valverde, PedroTodos os frutos sofrem perdas de qualidade desde o momento da colheita até ao seu consumo. A utilização de quitosano como revestimento edível tem sido uma alternativa no tratamento pós-colheita de uva de mesa com bons resultados. Tendo em consideração que a preparação de revestimentos à base deste biopolímero é realizada em solução de ácido acético, pretendeu-se ainda avaliar se a aplicação do referido ácido te...
Analysis of Growth Parameters for Crop Vegetables Under Broad and Narrow LED Sp...
Peixe, Augusto; Ribeiro, Hugo; Ribeiro, Augusto; Soares, Marco; Machado, Rui; Rato, Ana Elisa; Coelho, RenatoSeveral physiological and yield parameters were evaluated in lettuce plants, cv. ‘Trocadero’, while growing at four different photosynthetic photon flux (PPF) (70, 120, 250 and 400 ± 10 µmol m-2 s-1), under four light spectra, white (W), red (R) and blue (B) Light-Emitting Diode (LED) lamps and cool white fluorescent tubes (FL). Yield parameters were also evaluated on spinach, turnip and radish, growing under i...
Leaf water potential and sap flow as indicators of water stress in Crimson ‘see...
Shahidian, Shakib; Valverde, Pedro; Coelho, Renato; Agulheiro-Santos, A.C.; Vaz, Margarida; Rato, A.E.; Serrano, João Manuel; Rodrigues, SaraVitis vinifera L. cv. Crimson Seedless is a late season red table grape developed in 1989, with a high market value and increasingly cultivated under protected environments to extend the availability of seedless table grapes into the late fall. The purpose of this work was to evaluate leaf water potential and sap flow as indicators of water stress in Crimson Seedless vines under standard and reduced irrigation ...
Produção de arroz com baixo teor de arsénio utilizando tecnologias de Agricultu...
Alexandre, Carlos; Nunes, Jorge D.; Coelho, Renato; Silva, Luís L.; Marques da Silva, José R.O projecto ‘Produção de arroz com baixo teor de arsénio utilizando tecnologias de Agricultura de Precisão’ (AP) começou por visar a aplicação de tecnologias de AP com vista à selecção de áreas com maior potencial para a produção de arroz de elevada qualidade, avaliada pelo baixo teor de arsénio no grão. Para tal procedeu-se a dois anos (2010 e 2011) de recolha e medição do arsénio em amostras de arroz (grão) pr...
Response to salinity in young olive trees of three Iberian varieties
Coelho, Renato; Sousa, Adélia; Rato, A.E.; Vaz, MargaridaSoil salinization is a problem in the Mediterranean region. This paper reports a research on the response to salt in two year-old olive trees (Olea europaea L.) of three Iberian varieties: Arbequina, Cobrançosa and Galega Vulgar. Plants were grown in plastic pots containing approximately 9 Kg of a sandy granitic soil, on a greenhouse at the University of Évora since February 2010. The experiment went from Febru...
Testing four methods to assess leaf area in young olive trees
Coelho, Renato; Dambiro, José; Carlos, Rui; Pirata, Madalena; Campos, Tiago; Queirós, Rui; Carrilho, João; Barreto, Sérgio; Tufik, CamilaAssessment of leaf area is of fundamental importance to calculate diverse physiological parameters such as the total rate of transpiration or photosynthesis of a plant or its leaf area index (LAI). This paper reports the determination of total leaf area in 3 year-old olive trees of two varieties using four different methods and leaf counting as the control method. Leaf area was determined on 7 plants of each va...