安徽农业科学2011，Vol.39Issue(23)：13907-13910,13917,5.
景天类和马齿苋类植物耐旱性快速评价方法初探
A Preliminary Study on Fast Evaluation Method of Drought Tolerance for Sedums and Portulacas Plants
摘要
Abstract
[Objective] The study aimed to establish the evaluation method for the fast and standardized determination of the drought tolerance for Sedums and Portulacas plants. [ Method ] With Sedum lineare, S. Mexicanum and Portulaca pilosa as the tested materials, their leaf structures were compared, the effects of simulated high temperature and drought stress on their morphological characteristics and physiological and biochemical indices by using the artificial climate chambers were studied and the validity of above indices in fast evaluation for drought tolerance was investigated. [ Result] The simulated drought stress in aritificial climate chambers could obviously improve the screening efficiency of drought tolerance for 3 plant species and was recommended to be employed as a basis to establish a fast and standardized evalation method for the drought resistance of Sedums and Portulacas. The leaf anatomical characteristics and morphological variations were closely associated with the water metabolism, which could be used as the basic references for fast evaluation of drought resistance in 3 plant species.The differences of chlorophyll and proline content among 3 plant species reflected their sensitivity to drought stress, which could taken as the reference indexes for fast evaluation of drought tolerance. The SOD and POD activities were not accordant with the drought resistance of 3 plant species, so they were not suitable to be used as the indices for the evaluation of drought tolerance. [ Conclusion ] According the data on leaf anatomy and morphological variations, combined with results of rewatering experiments, it was showed that the drought tolerance of 3 plant species was decreased in following order; P. Pilosa>S. Uneare >S. Mexicaniun.关键词
屋顶绿化/人工气候箱/景天类/马齿苋类/抗旱性/快速评价/生理生化指标Key words
Green roofs/ Aritificial climate chamber/ Sedums/ Portulacases/ Drought Tolerance/ Fast evaluation/ Physiological and biochemical indices分类
建筑与水利引用本文复制引用
刘文利,叶建军,余世孝,孙淑玲,李恒威,魏道江..景天类和马齿苋类植物耐旱性快速评价方法初探[J].安徽农业科学,2011,39(23):13907-13910,13917,5.基金项目
湖北省教育厅青年项目(Q20102606,B20112601). （Q20102606,B20112601）
