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Search Results: 1 - 10 of 14566 matches for " Adriano Delly;Rosa "
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Inibi??o do desenvolvimento in vitro de embri?es de Coffea por cafeína exógena
Rosa, Sttela Dellyzete Veiga Franco da;Santos, Cíntia Guimar?es dos;Paiva, Renato;Melo, Patrícia Leonardo Queiroz de;Veiga, André Delly;Veiga, Adriano Delly;
Revista Brasileira de Sementes , 2006, DOI: 10.1590/S0101-31222006000300025
Abstract: caffeine, the alkaloid known as 1,3,7 - trimetilxantina, is found in quiescent coffee seeds, amounting to a total of 1.1 to 1.7% in coffea arabica l. and 2 to 3% in coffea canephora pierre, mostly localized in theo endosperm, in the free cytoplasm of cells or complexed with chlorogenic acids. with the physiological function in plants not yet completely understood, caffeine causes an allelophatic effect, either inhibiting germination of a number of species or as an anti-herbivore or a natural pesticide agent. the slow germination of coffee seeds has not yet been elucidated and several causes are pointed to, such as the presence of the endocarp, low water and o2 uptake and presence of natural inhibitors and hormonal balance. although suggested, studies on coffee seed inhibition by the action of endogenous or exogenous caffeine are scarce. thus, the present study was designed to investigate the effect of exogenous caffeine on both germination and embryo development of coffea arabica l. and coffea canephora pierre. the experiment was conducted by utilizing seeds from red ripe berries of the cultivars rubi and apoat? iac-2258. after disinfecting the berries for 30 minutes by soaking in sodium hypochlorite (2% a.i.) and washing three times in distilled water and autoclaved, the embryos were removed and inoculated in a aseptic manner, in petrri dishes with 50% ms medium with the addition of sucrose and supplemented with different of concentrations of caffeine (0.00; 0.05; 0.10; 0.15; 0.20; 0.25; 0.30 and 0.40%). the embryos were maintained in a growth room at 27±20oc and photon flow density of 13μmol.m-2.s-1 for 23 days, when shoot length, root length and seedling fresh mass were evaluated. five days after cultivation, the percentage of radicle emission and that of cotyledons were evaluated, calculating the embryos with open cotyledons and with expanded radicles. a complete randomized experimental design was used six replications per treatment, each replicate consisting of
Enzimas removedoras de radicais livres e proteínas lea associadas à tolerancia de sementes milho à alta temperatura de secagem
Rosa, Sttela Dellyzete Veiga Franco da;Von Pinho, édila Vilela Resende;Vieira, Elisa Serra Negra;Veiga, Ruben Delly;Veiga, Adriano Delly;
Revista Brasileira de Sementes , 2005, DOI: 10.1590/S0101-31222005000200014
Abstract: maize seeds assume desiccation tolerance as they dry naturally during maturation and pre drying at 35oc after their physiological maturity can induce tolerance to artificial drying at 50oc. seeds of 'brs-3060' harvested with 42,2% water content and submitted to increased periods of pre-conditioning, showed enhanced tolerance to 50oc until 25,9% water content when they reached maximum physiological performance. seed quality was evaluated by germination and vigor tests and a-amilase enzyme activity. seeds tolerant and not-tolerant to drying at 50oc were investigated by means of electrophoretic standards of free radical-scavenging enzymes and lea proteins. the scavenger activity enzyme superoxide dismutase, peroxidase and catalase was detected in 5-day old seedling hypocotyl and lea protein was detected in embryonic axes. the results showed that maize seeds tolerant to 50oc are associated to catalase enzyme activity but are less related to superoxide dismutase and peroxidase enzymes activities. lea proteins were not present in maize seeds non tolerant to desiccation and their presence was associated to the physiological performance of tolerant seeds.
Armazenabilidade de sementes de cafeeiro colhidas em diferentes estádios de matura??o e submetidas a diferentes métodos de secagem
Veiga, André Delly;Guimar?es, Renato Mendes;Rosa, Sttela Dellyzete Veiga Franco da;Von Pinho, édila Vilela de Resende;Silva, Luiz Hildebrando de Castro e;Veiga, Adriano Delly;
Revista Brasileira de Sementes , 2007, DOI: 10.1590/S0101-31222007000100012
Abstract: the harvesting time and drying methods may influence the quality of coffee seeds during storage. this work was conducted with the objective of understand the effects of maturation stages and drying methods on the physiological quality and storability of coffee seeds. the experiments were performed at the seed analysis and electrophoresis laboratory of the department of agricultural of ufla. the fruits of the cultivar rubi were harvested, depulped and the mucilages removed by fermentation and the seeds washed and let on paper for removal of the water. the seeds were submitted to conventional drying (under shade) and drying in stationary drier at temperature of 35oc. as a control, seeds with no drying were analyzed. the evaluations were done soon after the drying treatments and after four and eight months of storage. the seeds were stored at 10oc in air-tight plastic packages. the germination test, radicle protrusion, seedling dry matter, emergence index speed, electric conductivity, electrophoresis analyses of heat-resistant proteins and quantification of endo-a-mannanase activity were the parameter evaluated. the design was completely randomized with 2 (maturation stages) x 3 (dryings) x 3 (storage time) factorial scheme with four replications. seeds harvested in the cherry stage have greater storage potential than in the green-yellow stage. reduced germination and vigor occur in the coffee seeds harvested in the green yellow stage, when submitted to fast drying. the presence or intensity heat-resistant protein bands is associated with seed drying. greater activity of endo-?-mananase enzyme occurs in seeds harvested in the cherry stage than in the green yellow stage. increase of the activity of endo-?-mananase enzyme occurs during storage.
Tolerancia de sementes de soja à desseca??o
Veiga, Adriano Delly;Rosa, Sttela Dellyzete Veiga Franco da;Silva, Paulo de Albuquerque;Oliveira, Jo?o Almir de;Alvim, Patrícia de Oliveira;Diniz, Kênia Almeida;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000300025
Abstract: the anticipated harvest of seeds after physiological maturity allows the obtaining of the better quality physiological, crop rotation and optimization of the processing structures. seeds do not tolerate dissection over all the stages and acquire tolerance in particular stages during maturation, this acquisition of dissection tolerance may coincide with physiological maturity and in soybean seeds, it take place at r7 stage with moisture close from 45% to 50%. so, the present research was intended to evaluate dissection tolerance of soybean seeds. the seeds were harvested at three phenologic stages, r6, r6/r7 and r7 and were submitted to artificial drying at 35oc to 20% of water content and at 42oc to 13%. a fourth harvest was accomplished with field dried seeds, these being utilized as a control. the quality of seeds was evaluated by tests of germination, electric conductivity and of cold, of dry weight of seedlings and lea protein electrophoresis.the experimental design was completely randomized in factorial scheme with four replicates. the control was compared singly with each treatment. from the results, it follows that both germinability and dissection tolerance of soybean seeds increase with the natural water loss in the field; seeds harvest at r7stage show increased physiologic quality, distinct pattern of lea proteins and greater dissection tolerance than at r6 and r6/r7stages; seeds drying harvested close to maturity induces the synthesis of lea proteins; and seeds harvested at r7 stage present physiological quality and lea protein pattern similar to the ones of filed dried seeds up to 14% of water content.
Do Bt Transgenic Events Alter the Phenotypic Stability of Maize Hybrids?  [PDF]
Rafael Parreira Diniz, Renzo Garcia Von Pinho, José Airton Rodrigues Nunes, Lívia Maria Chamma Davide, Adriano Delly Veiga, Jo?o Candido de Souza
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.614234
Abstract: Transgene insert location in the genome through different methods is random. Thus, alterations in the expression of desired trait may occur, as well as alterations in the expression of other characteristics of receptor plant. The purpose of this study was to compare Bt transgenic maize hybrids and the respective conventional isogenic hybrid in relation to adaptability and phenotypic stability. Field trails were set up in four locations of Minas Gerais, Brazil (Campo do Meio, Lavras, Madre de Deus and Paragua?u). A randomized complete block design was used, with three replications, and the treatment structure was a factorial 6 × 2, with six hybrids in the transgenic and conventional versions. Plant and ear height and grain yield were evaluated. To estimate stability, the Anicchiarico, Wricke and AMMI methodologies were used. Grain yield and ear height of the transgenic hybrids and their respective conventional isogenic hybrid did not differ. There are differences in the phenotypic stability between transgenic hybrids with Bt technology and their counterpart conventional isogenic hybrid.
Revista Brasileira de Milho e Sorgo , 2011,
Abstract: The seeds of sweet corn have high levels of soluble sugars and low starch content. These characteristicscan cause rapid loss of seeds viability. The aim of this study was to evaluate the physiological quality of seeds storedunder different conditions. The seeds used were a round shape super sweet maize of the cultivar SWB585. Seeds weresoaked in distilled water with gibberellic acid at concentrations of 0, 10 and 20 mg.l-1. After drying they were packedin vacuum plastic and paper packaging, and then stored in two environments (cold and room temperature), during fivestorage periods (0, 60, 120, 180 and 240 days). The following tests were carried out: germination, cold test, acceleratedaging and emergence speed rate. Acompletely randomizedexperimental design was used, in a factorial scheme 2 x 2 x3 x 5 (two types of packaging, two environments, three doses of GA3 and five storage times), with four replications. Itwas found that the packaging did not affect the physiological quality. Gibberellic acid loses effect on seed performancealong the storage time. The vigor of sweet maize seeds decreases linearly over time of storage.
Potencial de mitiga o da emiss o de gases de efeito estufa e enquadramento em Mecanismo de Desenvolvimento Limpo (MDL) de empreendimento de uso do biogás como fonte energética em cadeia produtiva de frango de corte Potential for mitigation of emissions of greenhouse gases and framework in Clean Development Mechanism (CDM) with the use of biogas as energy source in the broiler production chain
Adriano Henrique Ferrarez,Delly Oliveira Filho,Adílio Flauzino de Lacerda Filho,José Márcio Costa
Vértices , 2010,
Abstract: As a es humanas têm alterado a biosfera. O aumento de gases de efeito estufa (GEE) na atmosfera está fazendo a temperatura no planeta subir. O aquecimento global implicará mudan as climáticas, ecológicas, econ micas e sociais. Os Mecanismos de Desenvolvimento Limpo (MDL) permitem que os países industrializados financiem projetos de redu o de emiss es de GEE em países em desenvolvimento. O objetivo deste trabalho foi demonstrar que o biogás usado como fonte energética na Cadeia Produtiva de Frango de Corte é um projeto elegível no ambito do MDL. A receita obtida da comercializa o dos Certificados de Emiss es Reduzidas pode ser usada no financiamento da planta de gera o de energia. Human activity has changed the biosphere. The increase of greenhouse gases (GHG) emissions in the atmosphere is causing the temperature rise on the planet. Global warming will lead climate, ecological, economic and social changes. Clean Development Mechanism (CDM) allows industrialized countries to finance projects for reducing GHG emissions in developing countries. This study aims to demonstrate that the use of biogas as an energy source in the Production Chain of poultry is an eligible project under the CDM criteria. The proceeds of the sale of Certified Emission Reductions can be used to finance the power generation plant.
Influência do potássio e da calagem na composi??o química, qualidade fisiológica e na atividade enzimática de sementes de soja
Veiga, Adriano Delly;Pinho, édila Vilela de Resende Von;Veiga, André Delly;Pereira, Pedro Henrique de Andrade Resende;Oliveira, Kênia Carvalho de;Pinho, Renzo Garcia Von;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000400022
Abstract: the chemical composition of seeds can be influenced by genetical and environmental factors and by the availability of nutrients in the soil during production, which consequently affect their vigor. potassium can influence the activity of several enzymes present in plants. these enzymes are necessary in a number of reactions involved in the utilization of energy, starch synthesis, nitrogen metabolism and respiration. the effects of potassium fertilization and liming on the chemical composition, physiological quality and enzymes activities of soybean seeds were evaluated. the research was developed in the seed analysis laboratory of the agriculture department and in the plant production laboratory in the food science department of the federal university of lavras, lavras (ufla). in soybean seeds of cultivar msoy 8001 produced under two levels of base saturation (48% and 85%) and four doses. ha-1 of k2o, 0, 50, 100 and 200, oil and protein contents, seed germination, aging test and the activity of some enzymes involved in the seed germination and deterioration processes were evaluated. seed germination and vigor are not influenced by fertilization with potassium. however, base saturation increases the vigor of soybean seeds. highert doses of potassium increase oil content and reduce protein in soybean seeds. high base saturation level increases the protein content. the activities of the enzymes piruvate kinase, esterase and alcohol dehydrogenase are altered by the doses of potassium and levels of soil base saturation.
Quantitative trait loci associated with resistance to gray leaf spot and grain yield in corn
Veiga, Adriano Delly;Pinho, Renzo Garcia Von;Resende, Luciane Vilela;Pinho, édila Vilela de Resende Von;Balestre, Márcio;Pereira, Laís Andrade;
Ciência e Agrotecnologia , 2012, DOI: 10.1590/S1413-70542012000100004
Abstract: the main objectives of hybrid development programs include incorporating genetic resistance to diseases and increasing grain yield. identification of quantitative trait loci (qtl) through the statistical analysis of molecular markers allows efficient selection of resistant and productive hybrids. the objective of this research was to identify qtl associated with resistance to gray leaf spot and for grain yield in the germplasm of tropical corn. we used two strains with different degrees of reaction to the disease; the genotypes are owned by geneseeds ltda, their f1 hybrid and the f2 population. the plants were evaluated for gray leaf spot resistance, for grain yield and were genotyped with 94 microsatellite markers. association of the markers with the qtl was performed by single marker analysis using linear regression and maximum likelihood analysis. it was observed that the additive effect was predominant for genetic control of resistance to gray leaf spot, and the dominant effect in that of grain yield. the most promising markers to be used in studies of assisted selection are: umc2082 in bins 4.03 and umc1117 in bins 4.04 for resistance to gray leaf spot; for grain yield umc1042 in bins 2.07 and umc1058 in bins 4.11.
Effects of different drying rates on the physiological quality of Coffea canephora Pierre seeds
Rosa, Sttela Dellyzete Veiga Franco da;Brand?o Júnior, Delacyr da Silva;Von Pinho, édila Vilela de Resende;Veiga, André Delly;Silva, Luiz Hildebrando de Castro e;
Brazilian Journal of Plant Physiology , 2005, DOI: 10.1590/S1677-04202005000200002
Abstract: desiccation tolerance in seeds depends on the species, development stage and drying conditions, especially the water removal rate. coffea seeds are considered of intermediate performance, because they tolerate relative dehydration compared to orthodox seeds and are sensitive to low temperatures. the objective of this study was to verify the effect of different drying rates on the viability and storability of coffea canephora seeds. a complete randomized experimental design was used, in a factorial 3 x 5 x 2 design, with three drying rates (fast, intermediate and slow), five final mean water contents after drying (51, 42, 33, 22 and 15 %) and two storage temperatures (10 and 20°c). the germination and seed vigor assessments, using radicle protrusion, cotyledon leaf opening, seedling emergence and emergence speed index, were performed shortly after drying and after two and four months storage. it was observed that with reduction in the water content there was reduction in the germination values and seed vigor, for all the drying rates. the greatest reductions in physiological quality occurred when the seeds were dried quickly and the best results were obtained at the intermediate drying rate. there was an effect of drying rate and storage temperature on the physiological quality of the seeds, and lower germination and vigor values were observed in seeds with lower water content stored at 20°c. c. canephora seeds were tolerant to desiccation down to 15 % water content and can be stored for four months at 10°c. a temperature of 20oc can be used to store c. canephora seeds, as long as the water content is not reduced to values below 22 % water content.
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