With SC5 in cassava(Manihot esculenta) as the research subject, the drought resistance in cassava SC5 was investigated by measuring the endogenous abscisic acid(ABA)/proline/peroxidase(POD) and observing stomatal morphology under drought stress. The results showed that the contents of free proline in heart leaves of cassava increased significantly with the prolong of drought time. The activities of POD and the accumulation of ABA showed a trend of increasing first and then decreasing. While in functional le...