Authors : 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
Abstract: 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 , 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 , 2008. Physiological and Biochemical Changes in Soybean (Glycine max) Plants under Progressive Water Deficit During the Vegetative Phase. Agricultural Journal, 3: 327-333.