Studies on the character of water absorption and the germination conditions of Isatis indigotica seeds.

The research mainly focused on the character of water absorption of Isatis indigotica seeds indoors,and compared the germination rates,germination power and relative vigor index under different treatments.The results showed that the seeds had the biological characteristics of rapid water absorption,the water absorption period was divided into three stages:faster water absorption stage,slow water absorption stage and slow guttation stage.The water absorption of seeds reached the maximum 73.29%after 2 h into the water,showing this was faster water absorption stage.Temperature had great effect on the germination of I.indigotica seeds,and the optimal temperature was 30℃,while light,germination bed and pre-treatment on seed bring little effect on the germination,indicating that the germination of I.indigotica seeds depent primarily on moisture and temperature.