Studies on filling dynamic and germination characteristics of Scutellaria baicalensis Geor-gi
Objective To study the dynamic of seed filling and germination of Scutellaria baicalensis Georgi,and to determine the best harvest time of Scutellaria baicalensis Georgi seeds were studied in order to provide theoretic basis for its seed standard pro-duction.Methods Cards were hung as a flower sign in triennium Scutellaria baicalensis Georgi plants cultivated during blossom.The 1 000-grain weight and seed germination in the plants were measured in period time after 4 d following the blossom day.Re-sults The 1000-grain fresh weight increased and got at the highest value on the 26th day following blossom,and then rapidly de-creased to the level near its dry eight at 55d after flowering.The grain filling rate showed"fast-slow-fast"pattern,the water content reached the maximum at 9d after anthesis,the dehydration rate gradually accelerated with the process of filling,and reached a peak at 29d after anthesis,and then gradually decreased.Seeds did not germinate within 13 days after anthesis,and then germination rate and germination potential gradually increased until 48 days after anthesis.The germination rate and germina-tion potential were positively correlated with fresh and dry weight per thousand grains,and negatively correlated with water con-tent.Conclusion The best harvest time should be during 42～48d flowering blossom(late August and early September)during which the water content in the seeds should be about 11％.
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