6 rice cultivars with different drought tolerance were used to study the changes of morphological and physiological indexes of rice during germinating stage under osmotic stress. The results showed the drought-resistant coefficient was significantly (or very significantly) correlated with the relative length ofcoleoptiles and radicles, relative activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) and relative contents of reduced glutathione (GSH), proline (Pro), vitamin C (Vc), rnalondialdehyde (MDA), sperm...