Study on Seed Germination Characteristics of Medicinal Plant Angelica dahurica
The influences of different pH value,concentration of GA3 and illumination time on Angelica dahurica seed germination were studied under laboratory conditions. The conditions included five pH values(pH5.0,6.0,7.0, 8.0,and 9.0),five concentration gradients(50mg·L-1,100mg·L-1,150mg·L-1,200mg·L-1,250mg·L-1)and seven illu?mination treatments(12h,14h,16h,18h,20h,full illumination and full dark). The results showed that A.dahurica seed had extensive adaptability to solution pH values from 5.0 to 9.0,but under the condition of pH 7.0~8.0,germi?nation rate was higher. Seed-soaking with 150mg · L-1 GA3 solution for 6h increased the seed germination rate of A. dahurica significantly. The seed of A.dahurica was light neutral and would sprout under the condition of light or dark,but it germinated best with illumination time of 12h · d-1. We concluded that A.dahurica seed germinated best under the following conditions,seed-soaking with 150mg·L-1 GA3 solution;under the condition of pH 7.0~8.0;illu?mination time of 12h·d-1.
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