不同处理对桔梗种子萌发特性的影响  

Effects on Germination Characteristics with Different Treatments for Seed of Platycodon grandiflorum( Jacq. ) A. DC

作　　者：谭玲玲[1] 胡正海[2] 

机构地区：[1]青岛农业大学生命科学学院/山东省高校植物生物技术重点实验室,山东青岛266109 [2]西北大学生命科学学院,陕西西安710069

出　　处：《种子》2014年第7期15-18,23,共5页Seed

基　　金：山东省高等学校科技计划项目(编号:J11 LC06);山东省自然基金青年基金项目(编号:ZR2013 CQ027);青岛农业大学高层次人才启动基金(编号:630909)

摘　　要：通过研究桔梗种子形态(其长度、宽度、净度及千粒重)和不同处理(不同冰冻时间处理、不同温度的水浸泡、不同萌发介质、不同pH溶液浸泡)对桔梗种子萌发特性的影响,寻找提高其种子萌发率的适宜条件,从而为桔梗的人工栽培提供科学依据。结果表明,冰冻5 d的种子最终发芽率可以达到72.33%;40℃水浸种处理下种子发芽率最高为65%;双层纱布是桔梗种子发芽的最适发芽介质,以双层纱布的处理发芽率最高为70.33%;pH=7条件下浸泡种子可以使种子尽快萌发且发芽率较高为65.33%。To improve the germination rate and provide a scientific basis for artificial cultivation of Platycodon grandiflorum（Jacq. ）A. DC ,the physiological indexes of P. grandiflorum like the length and the width of the seeds, the seed purity and 1000-grain weight were measured. The germination rates were determined under the treatments of different frozen time, soaking in different temperatures water, different germination bed and soaking in different pH solutions. The seed germination rate could reach 72.33% under the treatment of frozen 5 d Different soaking temperature treatments had different influence on seed germination rate, it was the highest whea soaking in 40 ℃ water reached 65% ;The suitable germinating bed was beneficial to the seed germination, and the highest rate was 70. 33% on the double layer guaze; The highest germination fete reached 65.33% when the seeds were soaked in the solition（pH =7）.

关 键 词：桔梗 种子萌发 低温冷冻 浸种温度 发芽床 pH值 

分 类 号：R282.3[医药卫生—中药学] S567.239[医药卫生—中医学]