Authors : A.K.S. Lobato, M.A.M. Neto, A.C.S. Meirelles, L.I. Silva, C.A. Marochio, E.R. Monteiro, H. Zeni Neto, M.P. Maleia, L.D. Moiana, A.R. Bronzato and F.J.R. Cruz
Abstract: The aim of this study was to evaluate the impact of short water deficit on nitrate reductase activity and nitrogen contents in Glycine max plants (cv. Sambaiba), as well as to investigate the hypothesis that leaf relative water content exercises influence on total soluble proteins. Experimental design used was completely randomised, with 2 treatments (control and stress). Water deficiency promoted significant decrease on leaf relative water content in stress treatment. For nitrate reductase activity the period of 2 under water deficit provoked a reduction at 45% in stressed plants. In total soluble proteins the control and stress treatments presented 10.0 and 7.7 mg g-1 DM, respectively. The correlation analysis indicates that there is a positive and significant relationship between leaf relative water content and total soluble proteins (r = 0.88; p<0.01). This study revealed that Glycine max induced to short water deficiency presented significant decreases in leaf relative water content, nitrate reductase and total soluble proteins. Furthermore, total soluble amino acids also suffered significant disorders. In addition, the results obtained confirmed the hypothesis that leaf relative water content exercises influence on total soluble proteins.
A.K.S. Lobato, M.A.M. Neto, A.C.S. Meirelles, L.I. Silva, C.A. Marochio, E.R. Monteiro, H. Zeni Neto, M.P. Maleia, L.D. Moiana, A.R. Bronzato and F.J.R. Cruz, 2009. Relationship Between Leaf Relative Water Content and Total Soluble Proteins in Soybean Exposed to Short Water Deficit. Research Journal of Biological Sciences, 4: 1061-1067.