| Drought is one of the most important factors affecting spring wheat yield in Ningxia Hui Autonomous Region.This study investigated the association between wheat resistance to drought and morphological or physiological traits under the imitate drought condition in laboratory.The morphological or physiological traits,such as germinating capacity,coleoptile's length,root length,number of roots, superoxide dismutase and proline were analyzed on different drought resistant wheat cultivars or lines at the stage of germinating and seedling.The results indicated that in drought stress condition,the high drought-resistant cultivars or lines had higher germinating capacity,longer coleoptile's length,lower reduction in the chlorophyll,higher increase in the proline contents,and higher activation of superoxide dismutase,coleoptile's length and root's amount are different from mediate or feeble drought-resistant cultivars or lines.13 wheat cultivars were divided into three classes,high drought-resistance,mediate droughtresistance and feeble drought-resistance.These results could be helpful to wheat drought-resistance breeding. |