RT - Journal Article T1 - Effects of Drought Stress on Physiological Characteristics in Wheat Recombinant Inbred Lines JF - jispp YR - 2016 JO - jispp VO - 5 IS - 15 UR - http://jispp.iut.ac.ir/article-1-111-en.html SP - 123 EP - 132 K1 - Key word: chlorophyll content K1 - leaf proline content K1 - drought stress K1 - recombinant inbreed lines K1 - physiological traits AB - Abstract Study of physiological reactions of recombinant inbreed lines (RILs) to drought stress could help to identify the actual drought tolerance mechanisms. In this view a field experiment was conducted to evaluate the effect of drought stress on chlorophyll content , leaf proline content, leaf length, leaf width, leaf area, peduncle length and plant height using 169 RILs, in the two separate simple Latis design with four replications using two moisture regime f normal and water deficit stress. Irrigation regimes performed based on Class A-pan of 70 and 130 mm evaporation from Class -A -pan and moisture content of soil in effected root depth. The RILs were obtained by crossing between a tolerant and sensitive wheat cultivar. The result of analysis of variance showed a significant difference among RILs. Drought stress caused a decrease in the chlorophyll content, leaf width, leaf length, peduncle length, leaf area and increase in the proline content. Although drought stress increased the proline content and decreased the peduncle length and leaf area in both tolerant and sensitive line groups, but these declines in tolerant lines was lower than sensitive lines. Therefore, It may be possible to use the physiological traits comprising proline amino acid content, peduncle length and leaf area as a selection tool for selecting drought tolerant lines in bread wheat. LA eng UL http://jispp.iut.ac.ir/article-1-111-en.html M3 ER -