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Articles by A.C.S. Meirelles
Total Records ( 3 ) for A.C.S. Meirelles
  A.K.S. Lobato , B.G. Santos Filho , R.C.L. Costa , C.F. Oliveira Neto , A.C.S. Meirelles , F.J.R. Cruz , G. A. R. Alves , H.K.B. Neves , J.D. Pita , M.J.S. Lopes , J.M.N. Freitas , B.S. Monteiro and R. Ferreira Ramos
  The experiment had the aim to investigate and evaluate the responses provoked by the progressive water deficit on leaf relative water content, plant dry matter, free proline, total soluble carbohydrate, sucrose and reducing carbohydrates levels in Glycine max (L.) Merril plants cultivar sambaiba. The experimental design was at randomized entirely factorial, with 2 hydric conditions (stress and control) and 4 stress points (0, 2, 4 and 6 days). It was showed in plants under water deficit the decrease of the leaf relative water content and plant dry matter, however, occurred increase in the total soluble carbohydrates, sucrose and reducing carbohydrates at 33.7, 205.0 and 19.2%, respectively, besides accumulation of free proline at 67.2% as biochemical mechanism of plant osmotic adjustment. It were showed changes on leaf relative water content, total soluble carbohydrates, sucrose and reducing carbohydrates in only 2 days under water stress, besides plant dry matter and proline after the 4th day of water restriction, proving the sensitive high of this species in conditions of water deficiency.
  A.K.S. Lobato , A.C.S. Meirelles , B.G. Santos Filho , R.C.L. Costa , C.F. Oliveira Neto , F.J.R. Cruz , J.M.N. Freitas , E.M.S. Guedes , A.G. T. Barreto , A.S. Ferreira , B.S. Monteiro , H.K.B. Neves and M.J.S. Lopes
  The experiment had the aim of investigate the responses provoked by the progressive water deficit and evaluate as the rehydration can to contribute to the recovery of the leaf relative water content, plant water content, nitrate reductase enzyme activity, as well as changes in the nitrogen compounds as free ammonium, total soluble amino acids and total soluble proteins in Glycine max (L.) Merril cultivar Sambaiba. The experimental design was at randomized entirely factorial, with 2 water conditions (control and stress/ rehydration) and 5 evaluation points (0, 2, 4, 6th day under stress and 7th day under rehydration). The nitrate reductase activity had accumulated reduction of 70% after 6 days of water deficit and the rehydration promoted increase of 96% in this parameter. The total soluble proteins were reduced at 20.7% in the 6th day of water restriction and after the rehydration were showed increase of 43% in this variable. The results showed with this cultivar submitted the water restriction reveal that occurr significant reductions in the leaf relative water content, plant water content, nitrate reductase enzyme activity, free ammonium and total soluble proteins, however, was showed increase in the free amino acids levels. The leaf relative water content, nitrate reductase enzyme activity and total soluble proteins were recovery after the rehydration.
  A.K.S. Lobato , M.C. Goncalves-Vidigal , P.S. Vidigal Filho , R.C.L. Costa , M.J.S. Lopes , A.S. Cruz , A.C.S. Meirelles and A.M.O. Goncalves
  The aim of this study was to investigate the responses of the nitrogen compounds in the cultivars México 222 (resistant) and Widusa (susceptible) of Phaseolus vulgaris L. plants inoculated with Colletotrichum lindemuthianum race 23. The experimental design used was entirely randomized in factorial scheme, with 2 cultivars (México 222 and Widusa) and 2 treatments (control and inoculated). The compounds evaluated were free ammonium, amino acids, proline and total soluble proteins. The proline level suffered significant increase only in cultivar Widusa, which the increase showed was at 18.9% in plants under pathogen inoculation, when compared with the control plants. The total soluble proteins level in Mexico 222 had significant increase, with the control and inoculated plants presented 4.77 and 6.60 mg g DM-1, respectively. The results revealed that the Widusa cultivar (susceptible) suffered significant changes in free ammonium, total soluble amino acids and proline, however the total soluble proteins level was kept stable. The Mexico 222 cultivar (resistant) presented not significant modification only in proline level. In addition, this study proved the strong influence of the Colletotrichum lindemuthianum pathogen on the nitrogen metabolism of Phaseolus vulgaris plants.
 
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