nitrate respiration
3.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.
