Consulta: creatorFacets:"Ribeiro,Luciana de Sá"
Registros recuperados: 6
Data/hora: 12/06/2024 14:39:17

Teor de açúcares solúveis e insolúveis em folhe de videiras, cv. syrah, em diferentes posições no ramo e épocas do ano
Provedor de dados: 94
Autores: Dantas,Bárbara França; Ribeiro,Luciana de Sá; Pereira,Maiane Santos.
Com o crescimento da área cultivada de videira para produção de vinho, tem aumentado a demanda por pesquisas para a região semi-árida do Brasil que resultem no desenvolvimento da viticultura no Vale do São Francisco. Todos os produtos da videira, como uva, vinho, passas, vinagre, têm origem nos açúcares que são produzidos nas folhas durante a fotossíntese e transportados, tanto para os frutos, na época de produção, como para troncos, raízes, folhas não expandidas na fase vegetativa. O objetivo deste trabalho é avaliar a influência da posição no ramo e da variação sazonal no teor de açúcares solúveis e insolúveis nas folhas em videiras para vinho (Vitis vinifera L.), cv. Syrah, no Vale do São Francisco. Para tanto, o trabalho foi realizado em um vinhedo...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis vinifera; Fenologia; Carboidratos.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452007000100011

Foliar carbohydrates content and invertase activity in vines at São Francisco River Valley - Brazil
Provedor de dados: 94
Autores: Dantas,Barbara França; Ribeiro,Luciana de Sá; Silva,Alexandro Pereira da; Luz,Sara Raquel de Souza.
The irrigated agriculture at the São Francisco River Valley, Northeast Brazil, shows an increasing production of grapes for winery. Among the wines produced there the one obtained from Vitis vinifera L., cultivar Syrah, stands out due to its adaptation to the climatic conditions of the region. However, little is known about carbohydrates metabolism of vines cultivated in this region. The objective of this work was to evaluate sugar and starch contents and the invertase activity in vines leaves during two consecutive growing seasons. The experiment was carried out at Embrapa Semi-Árido and at Santa Maria Winery, respectively located in Petrolina and Lagoa Grande, Pernambuco-Brazil. Leaves were collected weekly from January to December of 2003 and assessed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grape; Metabolism; Sugar.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452005000200004

Metabolic responses of guava trees irrigated withdifferent N and K levels in São Francisco Valley
Provedor de dados: 94
Autores: Dantas,Bárbara França; Pereira,Maiane Santos; Ribeiro,Luciana de Sá; Maia,Joselanne Luiza Trajano; Silva,Davi José; Duenhas,Luiza Helena; Lima,Maria Auxiliadora Coelho de; Bassoi,Luis Henrique.
The guava (Psidium guajava L.) cv. Paluma has been cultivated in São Francisco Valley, Northeastern of Brazil, for in natura consumption and processing purposes. In spite of its importance, there are few scientific knowledge regarding guava physiology, nutrition, irrigation and fertigation. The objective of this work was to evaluate the effect of weather conditions and different concentrations of N and K applied by fertigation in foliar contents of reducing sugars, total soluble sugars, starch, sucrose, amino acids, and proteins. The field experiment was carried out at Bebedouro Experimental Field and the biochemical evaluations at the Laboratory of Seed and Plant Physiology, both located at Embrapa Semi-Árido, Petrolina-PE. The doses of 200 g N and 100 g...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Psidium guajava; Primary metabolism; Carbohydrate.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452007000200026

Effect of humic substances and weather conditions on leaf biochemical changes of fertigated guava tree, during orchard establishment
Provedor de dados: 94
Autores: Dantas,Bárbara França; Pereira,Maiane Santos; Ribeiro,Luciana de Sá; Maia,Joselanne Luiza Trajano; Bassoi,Luis Henrique.
In São Francisco Valley, Northeast Brazil, humic substances have been used by growers in fertigated fruit crops, due to its improvements on soil conditions and in plant nutrient uptake, metabolism and growth, reported from different growing places and crops. Nevertheless, little information about plant response to humic substance usage for local soil, weather and cropping system conditions is known. Hence, the metabolic response of guava tree during the orchard establishment to fertigation with humic substances and its correlation to the weather conditions were evaluated in Petrolina, State of Pernambuco. The treatments were manure application in soil combined with mineral fertilizers and humic substances applied through water of irrigation. The results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Psidium guajava; Carbohydrates; Proteins; Amino acids.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452007000300040

Germination, initial growth and cotyledon protein content of bean cultivars under salinity stress
Provedor de dados: 95
Autores: Dantas,Bárbara França; Ribeiro,Luciana de Sá; Aragão,Carlos Alberto.
Excess salts in the root zone inhibit water uptake by plants, affect nutrient uptake and may result in toxicities due to individual salts in the soil solution. Excess exchangeable sodium in the soil may destroy the soil structure to a point where water penetration and root aeration become impossible. Sodium is also toxic to many plants. Beans (Phaseolus vulgaris L.) are consumed as protein source in northeastern Brazil, although little is known about common bean cultivar tolerance to salinity. The germination of bean cultivars under salt stress was studied. The cultivars 'Carioca' and 'Mulatinho' were submitted to germination test in a germinator at 25ºC, at the Seed Analysis Laboratory of the Brazilian Agricultural Research Corporation unit in the Semi-...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris; Vigor; Sodium chloride.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222007000200014

Physiological response of cowpea seeds to salinity stress
Provedor de dados: 95
Autores: Dantas,Bárbara França; Ribeiro,Luciana de Sá; Aragão,Carlos Alberto.
This work aimed to evoluate physiological response of cowpea (Vigna unguiculata L. Walp) seeds submitted to salt stress. Seeds of cultivars 'Epace-10'; 'Canapu' and 'Pitiúba' of cowpea, were submitted to germination test in germinator at 25(0)C, in "germitest" papers imbibed in distilled water or in 0, 10, 50, 100 and 200mol m-3 NaCl solutions. At the first and second counting of the germination test, normal seedlings were accounted, weighted and dried, obtaining data for vigor, total germination, fresh matter weight and dry matter weight. The seedlings hypocotyls, root and total length were measured total proteins content in cotyledons were obtained from germinating seeds. The presence of salt at concentrations higher than 50mol m-3 NaCl affect the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna unguiculata; Sodium chloride; Germination; Vigor; Protein.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222005000100018