Study on seed filling and germination characteristics of Hypericum perforatum
Hypericum perforatum is the base plant of antidepressant traditional Chinese medicine,which is mainly sexually propagated and has small seeds.To reveal the development patterns and the optimum harvest time of the seeds,the 2-year-old H.perforatum cultivated in Li County of Gansu Province was used as the research materi-al,starting from the 5th day after flowering.The dynamic changes in seed weight were measured every 3 days,and the Logistic curve equation was fitted to predict the filling parameters.Finally,the seed germination indicators col-lected at each stage were measured.The results showed that the plant filling duration was 44 days,and the changes of seed dry mass followed the Logistic curve:the 5th to 11th day after flowering was a gradual increase period,the 11th to 32nd day was a rapid increase period,and after entering a stable increase period from 32nd to 44th day,it slightly decreased.During the filling process,the fresh mass of seeds showed a dynamic change,first increasing and then decreasing,reaching its maximum value of 0.2697 g on the 32nd day after flowering.The filling rate and dehydration rate showed a fluctuating trend.The dry mass of seeds showed a highly significant positive correlation with the average filling rate and filling duration,while a highly significant negative correlation with water content.The seed germination rate and germination index reached their maximum at 44 days and the germination potential reached its maximum at 41 days after flowering.The germination rate,germination potential,and germination index were highly significantly positively correlated with the filling duration,and highly significantly negatively correlated with water content.The above indicated that the optimum seed harvesting time was 44 days or so after flowering(a-round Aug.9th)in Li County,Gansu Province.Premature and delayed harvesting both affect seed germination quality.
Hypericum perforatumseed fillinggermination characteristicsharvest periodLogistic model
万方数据
维普
