5种地被植物抗旱生理及差异比较

以5种园林地被植物迷迭香、千层金、薰衣草、紫柳和栀子花作为材料,通过盆栽控水试验,研究不同干旱胁迫水平对植物相对含水量、叶绿素总量、可溶性糖含量、丙二醛含量和脯氨酸含量的影响.结果表明,在中度胁迫处理下,紫柳的相对含水量下降率最大,迷迭香的叶绿素总量下降率最大,紫柳的可溶性糖含量变化率最大,薰衣草的丙二醛含量变化率最大,迷迭香的脯氨酸含量变化率最大;运用主成分分析5种植物干旱情况影响最大的生理指标是:丙二醛和游离脯氨酸;运用隶属函数法对抗旱能力进行综合评定,得出5种园林地被植物抗旱性从大到小的顺序为:千层金、栀子花、薰衣草、迷迭香、紫柳.

On Comparison of Drought Resistant Physiology and Differences of Five Groundcover Plants

Rosemarinus officinalis,Melaleuca bracteata,Lavandula pedunculata,Salvia leucantha and Grardenia jasminoides have been used to study the effects on physiological changes under the moderate drought,which chlorophyll,soluble sugar,malondialdehyde,praline,peroxidase fluorescent were detected by pot experiment.The results indicate that,under moderate drought stress,the decreasing rate of RWC of Salvia leucantha is the maximum,the decreasing rate of total chlorophyll content of Rosemarinus officinalis is the maximum,the change of the soluble sugar content for Salvia leucantha is the maximum,the change of Malondialdehyde content of Rosemarinus officinalis is the maximum,the Pro content rate of change for Rosemarinus officinalis is the maximum,and the Melaleuca bracteata is the minimum;the relationship between eight physiological indicators of five plants were discussed by principal component analysis.The principal physiological parameters: Malondialdehyde and Proline have great impacts on drought resistance of five species.In this study,subordinate function method is employed to evaluate the drought resistance.The order of the drought resistance for the plants investigated in this thesis is as follows: Melaleuca bracteata,Grardenia jasminoides,Lavandula pedunculata,Rosemarinus officinalis,Salvia leucantha.