Eunice Bacelar - Academia.edu (original) (raw)
Papers by Eunice Bacelar
Foods
The probability that fruit ingestion may protect human health is an intriguing vision and has bee... more The probability that fruit ingestion may protect human health is an intriguing vision and has been studied around the world. Therefore, fruits are universally promoted as healthy. Over the past few decades, the number of studies proposing a relationship between fruit intake and reduced risk of major chronic diseases has continued to grow. Fruits supply dietary fiber, and fiber intake is linked to a lower incidence of cardiovascular disease and obesity. Fruits also supply vitamins and minerals to the diet and are sources of phytochemicals that function as phytoestrogens, antioxidant and anti-inflammatory agents, and other protective mechanisms. So, this review aims to summarize recent knowledge and describe the most recent research regarding the health benefits of some selected red fruits.
Agriculture
Grapevine reproductive development extends over two growing seasons (vegetative cycles), for the ... more Grapevine reproductive development extends over two growing seasons (vegetative cycles), for the complete formation of inflorescences and clusters. Induction and floral differentiation, the mechanism that leads to the formation of reproductive structures inside dormant buds, is a complex process divided into three well-defined stages (formation of anlagen, inflorescence primordia and flowers). This sequence of stages comprises morphological, biochemical, and physiological events, influenced by a set of environmental and endogenous factors. Inflorescence primordia formation determines the potential number of clusters that will be formed in the following growing season. Thus, during bud dormancy, viticulturists and winemakers can obtain a first yield prediction through the determination of bud fruitfulness. This information allows adjustments to be made to bud load, promoting balanced yield and fruit quality and higher commercial value. The present review describes the morphology and ...
A humidade relativa elevada (HR > 85%) durante o cultivo de rosas de corte tem implicacoes neg... more A humidade relativa elevada (HR > 85%) durante o cultivo de rosas de corte tem implicacoes negativas na longevidade pos-colheita, estando descritas diferentes suscetibilidades entre cultivares. No presente estudo foi avaliado o efeito da HR ao nivel das caracteristicas anatomicas e histologicas das folhas em seis genotipos pertencentes a uma populacao segregante tetraploide de rosas de corte (quatro sensiveis e dois com resposta intermedia a desidratacao) cultivados em HR moderada (60%) ou elevada (90%). Folhas desenvolvidas a HR elevada apresentaram uma maior area foliar especifica (aumentos de 12,8% e 26,8% nos genotipos sensiveis e intermedios, respetivamente) e menor suculencia (reducao em 9,5 % nos genotipos sensiveis e 10,7% nos genotipos intermedios). Verificou-se igualmente nestas condicoes um decrescimo da espessura da lâmina total, da cuticula, da epiderme de ambas as faces e da densidade estomatica, embora se tenha observado um aumento significativo das dimensoes do ap...
Plant Physiology and Biochemistry, 2021
Copper (Cu) is an essential micronutrient for plants, but when present in excess, it induces toxi... more Copper (Cu) is an essential micronutrient for plants, but when present in excess, it induces toxicity. In this study, cuttings of four wine-producing varieties of Vitis vinifera L. were used: 'Tinta Barroca', 'Tinto Cão', 'Malvasia Fina' and 'Viosinho'. The grapevine cuttings were distributed by hydroponic solutions enriched with different Cu concentrations (1, 10, 25 and 50 μM) plus control. At the end of the experiment, the root growth was evaluated, and individual roots were collected, fixed, and used for histological sections and chromosome spreads preparation. The higher Cu concentrations induced toxicity and inhibited root growth. However, the grapevine varieties responded with the thickening of the root exodermis and endodermis. In the chromosome spreads, normal and abnormal interphase and mitotic cells were observed in all varieties and treatments. The increase of Cu concentration decreased the nucleolar activity, as seen by reducing the nucleolar number and area. It increased the frequency of interphase cells with anomalies (ICA), but it did not influence total soluble protein concentration. The augment of Cu concentration also decreased the mitotic index (MI) and increased the percentage of dividing cells with anomalies (DCA). Different types of chromosomal anomalies in all mitotic phases, treatments and varieties were found. Overall, the white wine varieties, 'Malvasia Fina' and 'Viosinho', appeared to be more tolerant to the Cu-induced stress because they showed higher root growth and mean MI and lower mean DCA than the red wine varieties.
Foods, 2019
Flavours and fragrances are especially important for the beverage and food industries. Biosynthes... more Flavours and fragrances are especially important for the beverage and food industries. Biosynthesis or extraction are the two main ways to obtain these important compounds that have many different chemical structures. Consequently, the search for new compounds is challenging for academic and industrial investigation. This overview aims to present the current state of art of beverage fragrance biotechnology, including recent advances in sensory and sensor methodologies and statistical techniques for data analysis. An overview of all the recent findings in beverage and food fragrance biotechnology, including those obtained from natural sources by extraction processes (natural plants as an important source of flavours) or using enzymatic precursor (hydrolytic enzymes), and those obtained by de novo synthesis (microorganisms’ respiration/fermentation of simple substrates such as glucose and sucrose), are reviewed. Recent advances have been made in what concerns “beverage fragrances cons...
Journal of plant physiology, Jan 3, 2017
Pinus sylvestris L. (Scots pine) is the conifer with widest natural distribution area. Portugal c... more Pinus sylvestris L. (Scots pine) is the conifer with widest natural distribution area. Portugal constitutes its westernmost limit of distribution. Most of the Portuguese populations were planted but two autochthonous populations were recently ascribed to 'Serra do Gerês' (NW Portugal), and seem to be well adapted to the temperate climate. However, the ongoing climate changes may compromise their survival. With this study we intend to evaluate the anatomic-physiological and genetic responses of Scots pine from five European provenances ('Gerês', 'Puebla de…
Vitis Journal of Grapevine Research, 2009
Procedia Environmental Sciences, 2015
Climate change will affect the expected recovery of stratospheric ozone layer to pre-1980 levels ... more Climate change will affect the expected recovery of stratospheric ozone layer to pre-1980 levels and ozone depletion is still an important concern in scientific community, due to the resulting increase in UV-B (280-315 nm) radiation at the Earth's surface (WMO, 2011), with negative impacts in plants and animals (Björn, 1996; Caldwell et al., 2007; Correia et al., 2012). The aim of this work, carried out in a glasshouse, was to evaluate the influence of enhanced UV-B radiation, simulating a 20% reduction in the ozone layer over northern Portugal, on triticale (x Triticosecale Wittm.) crop. Enhanced UV-B induced reductions in plant height, total green leaf area, leaf area per leaf, total biomass, grain yield, grain number, grain weight, transpiration rate and stomatal conductance. In opposition, UV-B treated plants had higher maximum and minimum chlorophyll fluorescence, chlorophylls, carotenoids, starch and UV-B absorbing compounds concentrations and intrinsic water use efficiency, indicating an active plant response to UV-B-induced stress. Meanwhile, no significant differences were detected in internodes number, total leaf number, leaf area ratio, specific leaf area, leaf weight ratio, maximum quantum yield of PSII, leaf thickness, stomatal density, soluble proteins and soluble sugars concentrations. In conclusion, the sensitivity of triticale plants to a supplemental dose of UV-B radiation, based on the negative effects on growth, yield and physiological processes, may have important economic consequences in this multipurpose crop.
Procedia Environmental Sciences, 2015
Availability of water to grapevines is influenced by climate conditions that in a high extent exp... more Availability of water to grapevines is influenced by climate conditions that in a high extent explain the variability of wine terroirs worldwide. Furthermore, the "soil-plant-atmosphere" continuum has a significant influence on grapevine physiology and consequently on crop growth and development. Under the dry and hot summer climate conditions of the Douro region, several physiological, biochemical and molecular disorders may occur in vines with detrimental consequences on yield and grape quality. Among these disorders, photosynthesis is a physiological process usually affected. The changes in fast OJIP fluorescence rise in chlorophyll a fluorescence induction has been recognized in a significant number of scientific studies as an easy-to-use, weather-independent and nondestructive method that provides an efficient tool to monitoring the PSII activity changes of plants under different environmental conditions. Therefore, in order to investigate a functional pattern of PSII...
O azoto apresenta um papel primordial na acumulação de biomassa vegetal, sendo um constituinte de... more O azoto apresenta um papel primordial na acumulação de biomassa vegetal, sendo um constituinte de compostos de interesse vital, entre os quais os aminoácidos, as proteínas, os ácidos nucleicos, as hormonas e a clorofila. Neste trabalho apresentam-se resultados de um ensaio de campo com duas modalidades de azoto conduzido em olival de sequeiro de Verdeal Transmontana desde o início de 2004
AI~D0aUf0 leia, 15 a 17 de novembro de 2D12 VI Simpósio Nacional de Olivicultura Mirandela , 15 a... more AI~D0aUf0 leia, 15 a 17 de novembro de 2D12 VI Simpósio Nacional de Olivicultura Mirandela , 15 a 17 de novembro de 2D12 2.5. Utilização da máquina de podar de discos num olival de 400 árvores por hect. are.
Foods
The probability that fruit ingestion may protect human health is an intriguing vision and has bee... more The probability that fruit ingestion may protect human health is an intriguing vision and has been studied around the world. Therefore, fruits are universally promoted as healthy. Over the past few decades, the number of studies proposing a relationship between fruit intake and reduced risk of major chronic diseases has continued to grow. Fruits supply dietary fiber, and fiber intake is linked to a lower incidence of cardiovascular disease and obesity. Fruits also supply vitamins and minerals to the diet and are sources of phytochemicals that function as phytoestrogens, antioxidant and anti-inflammatory agents, and other protective mechanisms. So, this review aims to summarize recent knowledge and describe the most recent research regarding the health benefits of some selected red fruits.
Agriculture
Grapevine reproductive development extends over two growing seasons (vegetative cycles), for the ... more Grapevine reproductive development extends over two growing seasons (vegetative cycles), for the complete formation of inflorescences and clusters. Induction and floral differentiation, the mechanism that leads to the formation of reproductive structures inside dormant buds, is a complex process divided into three well-defined stages (formation of anlagen, inflorescence primordia and flowers). This sequence of stages comprises morphological, biochemical, and physiological events, influenced by a set of environmental and endogenous factors. Inflorescence primordia formation determines the potential number of clusters that will be formed in the following growing season. Thus, during bud dormancy, viticulturists and winemakers can obtain a first yield prediction through the determination of bud fruitfulness. This information allows adjustments to be made to bud load, promoting balanced yield and fruit quality and higher commercial value. The present review describes the morphology and ...
A humidade relativa elevada (HR > 85%) durante o cultivo de rosas de corte tem implicacoes neg... more A humidade relativa elevada (HR > 85%) durante o cultivo de rosas de corte tem implicacoes negativas na longevidade pos-colheita, estando descritas diferentes suscetibilidades entre cultivares. No presente estudo foi avaliado o efeito da HR ao nivel das caracteristicas anatomicas e histologicas das folhas em seis genotipos pertencentes a uma populacao segregante tetraploide de rosas de corte (quatro sensiveis e dois com resposta intermedia a desidratacao) cultivados em HR moderada (60%) ou elevada (90%). Folhas desenvolvidas a HR elevada apresentaram uma maior area foliar especifica (aumentos de 12,8% e 26,8% nos genotipos sensiveis e intermedios, respetivamente) e menor suculencia (reducao em 9,5 % nos genotipos sensiveis e 10,7% nos genotipos intermedios). Verificou-se igualmente nestas condicoes um decrescimo da espessura da lâmina total, da cuticula, da epiderme de ambas as faces e da densidade estomatica, embora se tenha observado um aumento significativo das dimensoes do ap...
Plant Physiology and Biochemistry, 2021
Copper (Cu) is an essential micronutrient for plants, but when present in excess, it induces toxi... more Copper (Cu) is an essential micronutrient for plants, but when present in excess, it induces toxicity. In this study, cuttings of four wine-producing varieties of Vitis vinifera L. were used: 'Tinta Barroca', 'Tinto Cão', 'Malvasia Fina' and 'Viosinho'. The grapevine cuttings were distributed by hydroponic solutions enriched with different Cu concentrations (1, 10, 25 and 50 μM) plus control. At the end of the experiment, the root growth was evaluated, and individual roots were collected, fixed, and used for histological sections and chromosome spreads preparation. The higher Cu concentrations induced toxicity and inhibited root growth. However, the grapevine varieties responded with the thickening of the root exodermis and endodermis. In the chromosome spreads, normal and abnormal interphase and mitotic cells were observed in all varieties and treatments. The increase of Cu concentration decreased the nucleolar activity, as seen by reducing the nucleolar number and area. It increased the frequency of interphase cells with anomalies (ICA), but it did not influence total soluble protein concentration. The augment of Cu concentration also decreased the mitotic index (MI) and increased the percentage of dividing cells with anomalies (DCA). Different types of chromosomal anomalies in all mitotic phases, treatments and varieties were found. Overall, the white wine varieties, 'Malvasia Fina' and 'Viosinho', appeared to be more tolerant to the Cu-induced stress because they showed higher root growth and mean MI and lower mean DCA than the red wine varieties.
Foods, 2019
Flavours and fragrances are especially important for the beverage and food industries. Biosynthes... more Flavours and fragrances are especially important for the beverage and food industries. Biosynthesis or extraction are the two main ways to obtain these important compounds that have many different chemical structures. Consequently, the search for new compounds is challenging for academic and industrial investigation. This overview aims to present the current state of art of beverage fragrance biotechnology, including recent advances in sensory and sensor methodologies and statistical techniques for data analysis. An overview of all the recent findings in beverage and food fragrance biotechnology, including those obtained from natural sources by extraction processes (natural plants as an important source of flavours) or using enzymatic precursor (hydrolytic enzymes), and those obtained by de novo synthesis (microorganisms’ respiration/fermentation of simple substrates such as glucose and sucrose), are reviewed. Recent advances have been made in what concerns “beverage fragrances cons...
Journal of plant physiology, Jan 3, 2017
Pinus sylvestris L. (Scots pine) is the conifer with widest natural distribution area. Portugal c... more Pinus sylvestris L. (Scots pine) is the conifer with widest natural distribution area. Portugal constitutes its westernmost limit of distribution. Most of the Portuguese populations were planted but two autochthonous populations were recently ascribed to 'Serra do Gerês' (NW Portugal), and seem to be well adapted to the temperate climate. However, the ongoing climate changes may compromise their survival. With this study we intend to evaluate the anatomic-physiological and genetic responses of Scots pine from five European provenances ('Gerês', 'Puebla de…
Vitis Journal of Grapevine Research, 2009
Procedia Environmental Sciences, 2015
Climate change will affect the expected recovery of stratospheric ozone layer to pre-1980 levels ... more Climate change will affect the expected recovery of stratospheric ozone layer to pre-1980 levels and ozone depletion is still an important concern in scientific community, due to the resulting increase in UV-B (280-315 nm) radiation at the Earth's surface (WMO, 2011), with negative impacts in plants and animals (Björn, 1996; Caldwell et al., 2007; Correia et al., 2012). The aim of this work, carried out in a glasshouse, was to evaluate the influence of enhanced UV-B radiation, simulating a 20% reduction in the ozone layer over northern Portugal, on triticale (x Triticosecale Wittm.) crop. Enhanced UV-B induced reductions in plant height, total green leaf area, leaf area per leaf, total biomass, grain yield, grain number, grain weight, transpiration rate and stomatal conductance. In opposition, UV-B treated plants had higher maximum and minimum chlorophyll fluorescence, chlorophylls, carotenoids, starch and UV-B absorbing compounds concentrations and intrinsic water use efficiency, indicating an active plant response to UV-B-induced stress. Meanwhile, no significant differences were detected in internodes number, total leaf number, leaf area ratio, specific leaf area, leaf weight ratio, maximum quantum yield of PSII, leaf thickness, stomatal density, soluble proteins and soluble sugars concentrations. In conclusion, the sensitivity of triticale plants to a supplemental dose of UV-B radiation, based on the negative effects on growth, yield and physiological processes, may have important economic consequences in this multipurpose crop.
Procedia Environmental Sciences, 2015
Availability of water to grapevines is influenced by climate conditions that in a high extent exp... more Availability of water to grapevines is influenced by climate conditions that in a high extent explain the variability of wine terroirs worldwide. Furthermore, the "soil-plant-atmosphere" continuum has a significant influence on grapevine physiology and consequently on crop growth and development. Under the dry and hot summer climate conditions of the Douro region, several physiological, biochemical and molecular disorders may occur in vines with detrimental consequences on yield and grape quality. Among these disorders, photosynthesis is a physiological process usually affected. The changes in fast OJIP fluorescence rise in chlorophyll a fluorescence induction has been recognized in a significant number of scientific studies as an easy-to-use, weather-independent and nondestructive method that provides an efficient tool to monitoring the PSII activity changes of plants under different environmental conditions. Therefore, in order to investigate a functional pattern of PSII...
O azoto apresenta um papel primordial na acumulação de biomassa vegetal, sendo um constituinte de... more O azoto apresenta um papel primordial na acumulação de biomassa vegetal, sendo um constituinte de compostos de interesse vital, entre os quais os aminoácidos, as proteínas, os ácidos nucleicos, as hormonas e a clorofila. Neste trabalho apresentam-se resultados de um ensaio de campo com duas modalidades de azoto conduzido em olival de sequeiro de Verdeal Transmontana desde o início de 2004
AI~D0aUf0 leia, 15 a 17 de novembro de 2D12 VI Simpósio Nacional de Olivicultura Mirandela , 15 a... more AI~D0aUf0 leia, 15 a 17 de novembro de 2D12 VI Simpósio Nacional de Olivicultura Mirandela , 15 a 17 de novembro de 2D12 2.5. Utilização da máquina de podar de discos num olival de 400 árvores por hect. are.