关键词: 金莲花, 种子, 赤霉素, 发芽率, 生长性状

Abstract: 【Objective】To investigate the optimal concentration of gibberellin(GA₃)for seed germination and observe the subsequent growth of wild Trollius chinensis Bunge.【Methods】Four treatments of GA₃ with concentrations of 400,500 and 600 mg/L were conducted to treat the seeds of wild Trollius chinensis Bunge,distilled water was used as control(CK). After germination,the germination rate,phenological period and growth characteristics of the plants were investigated.【Results】The germination rate of Trollius chinensis Bunge under the treatment of distilled water(CK)was extremely low,at 1%;the germination rate of Trollius chinensis Bunge seeds under the treatment of 600 mg/L gibberellin was the highest,at 55%. When the seeds were soaked in distilled water for 12 h,the water absorption rate of Trollius chinensis Bunge seeds reached 80.6%,reaching the plateau. In the first year of introduced,the characters including plant height,crown width,main stem number,side branches number,flower diameter and perianth number of Trollius chinensis Bunge showed a big variation.【Conclusion】The germination rate of the seeds soaked in distilled water was very low,and the wild Trollius chinensis Bunge seeds needed to be treated with gibberellin,then could reach a certain germination rate. In the four treatments of this experiment,the treatment of the highest gibberellin concentration had the highest germination rate,but its influence on the subsequent growth of the plant was not positively correlated;the factor affecting the germination of Trollius chinensis Bunge seeds was not its water permeability. The population of introduced Trollius chinensis Bunge had higher variability,recommended to cultivate for a long time to improve its stability,so as to make it a variety,then could be planted.

Key words: Trollius chinensis Bunge, Seed, Gibberellin, Germination rate, Growth trait