【摘要】 采用盆栽方法,研究4种草本植物在人工控制干旱条件下的植物膜脂过氧化作用.结果表明,在干旱胁迫下,4种植物的脯氨酸质量分数均有不同程度的增加;可溶性蛋白质质量分数均表现出随干旱胁迫加强而降低的趋势;丙二醛(MDA)质量摩尔浓度表现出与质膜透性相似的变化趋势,即其质量分数和透性均随胁迫程度的加强而递增;超氧物歧化酶活性(SOD)活性和过氧化氢酶活性(CAT)活性在干旱胁迫下都表现出下降的趋势,并且下降幅度随胁迫程度的加强而增大.综合4种植物的指标表明,以类芦的抗旱性最强,百喜草、香根草其次,五节芒最弱.更多还原

【Abstract】 The membrane lipid peroxidation of 4 herbage plants for soil and water conservation was studied under artificial controlled arid condition by using pot-culture method.The results showed that,the quality scores of praline content of the 4 plants increased in various degrees under drought stress condition.The quality scores of soluble protein content decreased with the strengthening of drought degree.The variation trend of MDA molarity showed a similarity with the trend of membrane permeability,i.e.both its quality scores and permeability increased with the strengthening of drought degree.SOD and CAT activities declined with the strengthening of drought degree.The declined range increased with the drought stress.The result of comprehensive evaluation on all indexes of the 4 plants indicated that,Neyraudia reynadiana got the highest drought-resistant capacity;the secondary ones were Vetiveria zizanioides and Paspalum notatum;Miscanthus floridulu(Labnll.) Warb showed the weakest drought-resistant capacity.更多还原