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Articles by B.G. Santos Filho
Total Records ( 3 ) for B.G. Santos Filho
  R.C.L. Costa , A.K.S. Lobato , M.A.M. Neto , B.G. Santos Filho , W.J.M.S. Maia , C.F. Oliveira Neto , A.G.T. Barreto , R.S. Lemos and D.D.S. Gouvea
  The aim of this research is to describe the morpho-anatomy of Euterpe oleracea Mart. seed. The samples with 30 seeds (0, 10, 30 days after the beginning of the germination process), in which the seeds were placed in plastic boxes with sand as substrate and immediately introduced in germination chamber under 30 °C, being irrigated daily with distilled water. The morphological and anatomical observations of the seed were carried out in the times 0, 10 and 30 and 0 days of germination, respectively. This seed has ruminated endosperm, solid, besides being constituted by large cellular walls, with several pit primary fields. The testa is ruminated, constituted by fine cellular walls, divided in three layers (external, medium and internal), it being that the medium layer has vascular bundles. The embryo is conic, basal and axial linear, with two regions, being a proximal (hypocotyl-radicle axis) and other distal (cotyledon).
  A.K.S. Lobato , R.C.L. Costa , M.A.M. Neto , C.F. Oliveira Neto , B.G. Santos Filho , G.A.R. Alves , K.C. Costa , L.I. Silva , T.V. Conrado and M.P. Maleia
  The aim of the study was to investigate the consequences provoked by the water deficit on nitrogen compounds in Capsicum annuum L. (cv. Vermelho Gigante) plants. The experimental design used was entirely randomized, with 2 water regimes (control and stress), as well as it was composed by 5 repetitions. The free ammonium levels suffered significant interference, as well as the control and stress treatments presented 25.9 and 20.1 μmol NH4+/g/DM, respectively. The proline level was significantly increased at 121.8%, when compared with control plants. The glycinebetaine level in stress plants presented significant increase at 39.8%. The total soluble proteins were in control and stress treatments were 5.72 and 3.89 mg/g/DM, respectively. The study revealed that the water deficit of 6 days was sufficient to provoke changes in all the nitrogen compounds evaluated, in which the reduction in amount of free ammonium is due to lower nitrogen influx and decrease of the total soluble proteins is promoted by the protease enzyme action. However, the proline and glycinebetaine levels in stress plants were showed accumulations, due to process of plant osmotic adjustment.
  A.K.S. Lobato , L.M. Luz , R.C.L. Costa , B.G. Santos Filho , A.C.S. Meirelles , C.F. Oliveira Neto , H.D. Laughinghouse , M.A.M. Neto , G.A.R. Alves , M.J.S. Lopes and H.K.B. Neves
  The aim of this study was to investigate responses promoted by external application of silicon on nitrogen components in Capsicum annuum L. plants submitted to water deficiency. The experimental design was completely randomized, with 4 treatments (0, 0.25, 1.00 and 1.75 μM Si). Leaf relative water content suffered significant changes, with values of 51.9, 66.1, 68.9 and 74.4% in 0, 0.25, 1.00 and 1.75 μM Si treatments, respectively. In total soluble proteins under concentrations of 0, 0.25, 1.00 and 1.75 μM Si were obtained values of 3.8, 4.8, 5.5 and 4.9 mg g DM-1, respectively. This study suggests that exogenous silicon alleviates negative effects promoted by water deficiency on leaf relative water content, stomatal conductance, total soluble proteins, total soluble amino acids and glycinebetaine. Furthermore, the nitrate reductase activity were observed significant benefits only at the concentration of 0.25 μM Si+, however in free ammonium was no obtained improvement after silicon application. Proline level was maximized at concentrations of 1.00 and 1.75 μM Si.
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