Abstract:Effects of extracts from Peganum multisectum (Maxim.) Bobr. on seed germination, seedling growth and physiological characteristics of cucumber under the conditions of indoor culture and soil culture in flowerpot were investigated. The results showed that the cucumber seeds soaked with extracts of total alkaloid, dissoluble alkaloid and fat-soluble alkaloid from P. multisectum (Maxim.) Bobr., the activities of amylase, protease and lipase during seed germination were inhibited, the seed vigor and germination rate were suppressed, and respiration rate of seedling was slackened; root activity, chlorophyll content and activities of nitrate reductase, superoxide dismutase(SOD) and peroxidase(POD) of cucumber seedlings during seedlings growth were increased. The results indicated that cucumber seed soaked with extracts from P. multisectum (Maxim.) Bobr. could accelerate the growth of seedling and promote the breeding of healthy seedling.