Water stress can cause all kinds of physiological and biochemical responses on forest tree, which are indicated by changes of many physiological and biochemical indexes. Under the different drought extent of soil, the...Water stress can cause all kinds of physiological and biochemical responses on forest tree, which are indicated by changes of many physiological and biochemical indexes. Under the different drought extent of soil, the seedlings of Robinia pseudoacacia clones were tested. Testing indexes included water content, the ratio of bound water content and free water content ( Va/Vs ), free proline, soluble sugar, soluble protein ect. The results showed that water content decreased with the increase of soil drought, the rest indexes increased in different extent. The range of variance differed among clones. It was difficult to evaluate exactly the drought resistance of different clones depending on only physiological and biochemical index.展开更多
研究在水分胁迫下4个紫花苜蓿(M ed icag o sativa L.)品种抗旱生理生化指标的变化及其相互关系。结果表明:叶片水分饱和亏缺、甜菜碱含量、甜菜碱醛脱氢酶活性和脱落酸含量在水分胁迫下明显增加,品种间差异显著;叶片水分饱和亏缺在中...研究在水分胁迫下4个紫花苜蓿(M ed icag o sativa L.)品种抗旱生理生化指标的变化及其相互关系。结果表明:叶片水分饱和亏缺、甜菜碱含量、甜菜碱醛脱氢酶活性和脱落酸含量在水分胁迫下明显增加,品种间差异显著;叶片水分饱和亏缺在中度和重度胁迫下明显增加,其中W L 323和皇后苜蓿较高,V ector和敖汉苜蓿较低;W L 323和V ector苜蓿甜菜碱含量随着水分胁迫强度的增加而增加,皇后和敖汉苜蓿表现出先增加后降低的趋势,含量较高的是V ector和敖汉苜蓿;V ector苜蓿的甜菜碱醛脱氢酶活性随着胁迫强度的增加而增加,皇后、W L 323和敖汉苜蓿呈单峰变化,在中度胁迫下达到最大值;在水分胁迫下ABA含量明显增加,其中变化最大的是敖汉苜蓿,W L 323苜蓿变化最小;脱落酸通过甜菜碱醛脱氢酶间接影响苜蓿叶片在水分胁迫下甜菜碱的积累;敖汉苜蓿的抗旱性最强,其次是V ector,W L 323和皇后苜蓿抗旱性较弱。展开更多
文摘Water stress can cause all kinds of physiological and biochemical responses on forest tree, which are indicated by changes of many physiological and biochemical indexes. Under the different drought extent of soil, the seedlings of Robinia pseudoacacia clones were tested. Testing indexes included water content, the ratio of bound water content and free water content ( Va/Vs ), free proline, soluble sugar, soluble protein ect. The results showed that water content decreased with the increase of soil drought, the rest indexes increased in different extent. The range of variance differed among clones. It was difficult to evaluate exactly the drought resistance of different clones depending on only physiological and biochemical index.
文摘研究在水分胁迫下4个紫花苜蓿(M ed icag o sativa L.)品种抗旱生理生化指标的变化及其相互关系。结果表明:叶片水分饱和亏缺、甜菜碱含量、甜菜碱醛脱氢酶活性和脱落酸含量在水分胁迫下明显增加,品种间差异显著;叶片水分饱和亏缺在中度和重度胁迫下明显增加,其中W L 323和皇后苜蓿较高,V ector和敖汉苜蓿较低;W L 323和V ector苜蓿甜菜碱含量随着水分胁迫强度的增加而增加,皇后和敖汉苜蓿表现出先增加后降低的趋势,含量较高的是V ector和敖汉苜蓿;V ector苜蓿的甜菜碱醛脱氢酶活性随着胁迫强度的增加而增加,皇后、W L 323和敖汉苜蓿呈单峰变化,在中度胁迫下达到最大值;在水分胁迫下ABA含量明显增加,其中变化最大的是敖汉苜蓿,W L 323苜蓿变化最小;脱落酸通过甜菜碱醛脱氢酶间接影响苜蓿叶片在水分胁迫下甜菜碱的积累;敖汉苜蓿的抗旱性最强,其次是V ector,W L 323和皇后苜蓿抗旱性较弱。
