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| Corte,Viviana Borges; Borges,Eduardo Euclydes de Lima e; Gonçalves,José Francisco de Carvalho; Silva,Mirian Sousa. |
| The decay of seeds is irreversible and at best can only be delayed by applying techniques that reduce the velocity of the metabolic reactions involved. There is little information on the biochemistry of tropical forest tree seeds related to their storability. It was investigated the influence of the composition of lipids and soluble sugars of two storage compartments, the cotyledons and the embryonic axis, of Melanoxylon brauna Schot. (Leguminosae- Caesalpinioideae), a hardwood known as black brauna, seeds stored at 20 ºC for 0, 3, 6, 9 and 12 months (natural ageing) and for 0, 24, 48, 72 and 96 hours at 40 ºC (accelerated ageing). The levels of fatty acids and monosaccharides varied differentially in each of the embryo storage compartments. Changes in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbohydrates; Forest; Lipids; Native species; Storage. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222010000300017 |
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| Ataíde,Glauciana da Mata; Borges,Eduardo Euclydes de Lima e; Flores,Andressa Vasconcelos. |
| ABSTRACT: To occur seed germination distinct hydrolytic enzymes work together, enabling primary root protrusion. The objective of this study was to investigate changes in the activities of α-amylase, β-amylase, and glucose-6-phosphate dehydrogenase (G6PdH) during germination of Melanoxylon brauna Schott. seeds under thermal stress. To this end, seeds of this species were germinated under constant temperature (10, 25, 30 or 40°C) and samples were collected every 24h during a 96-h period, in which the activity of the enzymes were evaluated. At 25 and 30°C, optimal temperatures for the germination of the species, the activities of α-amylase, β-amylase, and G6PdH increased with seed imbibitions. At 10 and 40°C, enzyme activities decreased, impairing the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Α-amylase; Β-amylase; Glucose-6-phosphate dehydrogenase; Melanoxylon brauna. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000601044 |
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| Corte,Viviana Borges; Borges,Eduardo Euclydes de Lima e; Leite,Helio Garcia; Pereira,Barbara Luísa Corradi; Gonçalves,José Francisco de Carvalho. |
| Não há conhecimento específico para sementes florestais quanto aos processos metabólicos envolvidos durante o armazenamento, o que dificulta o estabelecimento de técnicas para sua conservação adequada. Assim, o objetivo do presente trabalho foi estudar a participação de enzimas do estresse oxidativo e metabolismo de lipídios durante o armazenamento ou envelhecimento acelerado. Sementes de brauna (Melanoxylon brauna - Leguminosae-Caesalpinoideae) foram envelhecidas naturalmente durante o armazenamento por 0, 3, 6, 9 e 12 meses em câmara fria e artificialmente (envelhecimento acelerado) durante 0, 24, 48, 72 e 96 horas, com objetivo de avaliar alterações na atividade das enzimas superóxido dismutase e catalase e nos teores de lipídios. Para isso, foram... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lipídio; Estresse; Armazenamento; Sementes florestais; Enzimas. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222010000100010 |
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| Silva,Mirian de Sousa; Brommonschenkel,Sérgio Hermínio; Faria,José Márcio Rocha; Borges,Eduardo Euclydes de Lima e. |
| The objective of this study was to partially characterize some genes involved in the desiccation tolerance of the embryonic axis of Melanoxylon brauna seeds subjected, or not, to oven fast-drying. Seeds were initially dried rapidly in an oven at 40 ºC, 50 ºC, 60 ºC, 70 ºC, and 80 °C, for 24, 48 and 72 h and then subjected to germination tests and moisture content determination. Degenerate primers were designed for 19 genes. The CDNA was used as a template for PCR amplifications using the degenerate primers, and the PCR products obtained were purified, cloned and sequenced. The seeds showed a gradual reduction in percent germination with increasing temperature and drying time. Nucleotide sequences of the cloned fragments related to genes CAT1, SPS1, Abi5,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water; Stress; Drying; Sequencing. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000100004 |
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| Dias,Maristela Aparecida; Dias,Denise Cunha Fernandes dos Santos; Borges,Eduardo Euclydes de Lima e; Dias,Luiz Antônio dos Santos. |
| A presença de compostos fenólicos nas estruturas das sementes de mamão pode interferir no processo de germinação, de forma que o objetivo no estudo foi avaliar o efeito da época de colheita e da maturação dos frutos sobre a ocorrência de compostos fenólicos e qualidade de sementes de mamão. Os frutos foram colhidos em abril e outubro de 2010 e as sementes extraídas nos estádios 1, 3, 5 e final da maturação, correspondendo a cerca de 15, 50, 75 e 100% da casca amarela, respectivamente. Em cada estádio, sementes com e sem sarcotesta foram avaliadas quanto à porcentagem de germinação, primeira contagem, envelhecimento acelerado, sementes dormentes e conteúdo de fenóis nas sementes pelo método de Folin-Ciocalteau em delineamento inteiramente ao acaso. As... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carica papaya L.; Armazenamento de frutos; Compostos inibidores; Dormência. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000400737 |
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| Souza,Patrícia Pereira de; Motoike,Sérgio Yoshimitsu; Carvalho,Mychelle; Kuki,Kacilda Naomi; Borges,Eduardo Euclydes de Lima e; Silva,Antônio Marcos. |
| ABSTRACT: Macauba palm stands out for having favorable features to biodiesel production such as the high oil content of its fruit. Considering the great potential of the species and their applicability in the renewable energy field, it becomes indispensable to establish the right conditions for storing the seeds for propagation purpose. The aim of this research was to evaluate the effect of seed moisture content, packaging, and storage conditions such as temperature and relative humidity on the quality of seeds from Minas Gerais State, during a 12-month storage period. The research had two independent assays: (I) the seeds were stored with three moisture contents/ranges 4.0≤6.0%; 6.0≤8.0% and 8.0≤10.0% in impermeable packages, under room temperature and at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acrocomia aculeata; Recalcitrant; Orthodox. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001101932 |
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