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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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| Bicalho,Elisa Monteze; Motoike,Sérgio Yoshimitsu; Lima e Borges,Eduardo Euclydes de; Ataíde,Glauciana da Mata; Guimarães,Valéria Monteze. |
| ABSTRACT Reserve mobilization in seeds occurs after visible germination, which is marked by the protrusion of the radicle or cotyledonary petiole, as in species of Arecaceae. Acrocomia aculeata (macaw palm), usually produces hard seeds whose endosperm has mannan-rich cell walls. We investigated the composition of storage compounds in macaw palm seed and the roles of two enzymes (endo-β-mannanase, α-galactosidase) during and after germination. The seeds were firstly submitted to pre-established protocol to overcome dormancy and promote germination. Enzyme activity in both embryo and endosperm were assayed from the initiation of germinative activities until leaf sheath appearance, and the status of seed structures and reserve compounds were evaluated.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Α-galactosidase; Arecaceae; Endo-β-mannanase; Galactomannan; Lipid; Palm seed; Protein; Starch. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300438 |
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| Castro,Renato Vinícius Oliveira; Ataíde,Glauciana da Mata; Castro,Ana Flávia Neves Mendes; Araújo Júnior,Carlos Alberto; Santos,Rosimeire Cavalcante dos; Costa,Lidiomar Soares da. |
| Abstract: The objective of this work was to evaluate the effect of forest rotation on the technical and economic feasibility of eucalyptus wood production for charcoal, in different productivity classes. Data came from Eucalyptus stands whose area was stratified into three classes of productivity: high, medium, and low. To each class, a different criterion of forest rotation was applied, as follows: age of maximum productivity, economic rotation age, single harvest age, and no technical parameter. Analyses of economic feasibility and production were performed for a 21-year planning horizon. For rotation without a technical parameter, a simulation by the Monte Carlo method was performed. For all rotation criteria, feasibility was observed for high- and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest economics; Forest planning; Harvest age. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000101600 |
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