Drought Resistance and Root Anatomy of Lespedeza davurica (Laxm.) Schindl
To reveal the relationships between the anatomical structures and drought resistance, the structure characteristics of Lespedeza davurica (Laxm.) Schindl were studies under arid environments. Root anatomy of six L. davurica populations from Shanxi province was observed using paraffin method. Drought tolerance of L. davurica was also evaluated using comprehensive appraisal indices such as ANOVA analysis, clustering analysis, correlation analysis and subordinate function analysis. Ten indicators were selected through ANOVA analysis indicating six populations are clustered into three groups according to vascular tissue characteristics, vascular cylinder structure and root macroscopical characteristics. Vessel diameter, ratio of xylem area / root transverse, vessel density, vascular cylinder diameter and root diameter are selected as typical indices of three groups using correlation analysis. Drought resistance classes were determined as: Yangquan＞Jiaokou＞Qinyuan＞Taigu＞Jingle＞Qinshui using subjection function values analysis. Vascular cylinder diameter, vessel diameter and vessel density was inversely related to local rainfall. Root diameter and ratio of xylem area / root transverse show a lesser negative correlation with rainfall.
NETL
NSTL
万方数据
维普
