两种长白山野生草本地被植物对水分胁迫的生理响应

摘要

Trifolium lupinaster L and Lysimachia dvurica Leddebour, two kinds of wild herbaceous ground covers in Changbai Mountains were taken as materials to conduct water stress experiment .The results showed that leaf relative water content of them presented different change , with the extension of water stress , electrolyte and sol-uble sugar content showed the tendency of gradually increase .On condition that persistent drought , malonalde-hyde content of Lysimachia dvurica Leddebour increased with relatively large extent .Lysimachia dvurica Ledde-bour had strong abilities to resist continuous drought , Trifolium lupinaster L had strong abilities to resist continu-ous water logging .%以长白山野生草本地被植物野火球、黄莲花为材料，进行水分胁迫试验。结果表明：两种植物的叶片相对含水率呈现出不同的变化状态，电解质渗出率随时间的延长呈现逐渐增加的趋势，可溶性糖含量随胁迫时间的延长均呈现逐渐增加的趋势，持续干旱条件下黄莲花丙二醛含量增加幅度相对较大。黄莲花抵抗持续干旱能力较强，野火球抵抗持续水淹能力较强。