温度对千里光种子萌发特性的影响  

Primary Study on Characteristics of Seed Germination in Senecio scandens Buch-Ham

作　　者：钱刚[1] 彭家琼[2] 平军娇[1] 汤贤春[1] 

机构地区：[1]遵义医学院细胞生物学与遗传学教研室,贵州遵义563003 [2]遵义医学院解剖学教研室,贵州遵义563003

出　　处：《辽宁中医杂志》2010年第7期1342-1343,共2页Liaoning Journal of Traditional Chinese Medicine

基　　金：遵义医学院博士启动基金项目;贵州省科学技术基金项目(黔科合J字[2007]2050号);贵州省优秀科技教育人才省长基金项目(黔省专合字2008-61号)

摘　　要：目的：了解温度条件对千里光种子发芽率的影响,为千里光的遗传资源改良和规范化栽培奠定技术基础。方法：千里光种子分别置于25、20、15℃恒温光照培养箱以及4-20℃的室外变温培养,检测种子的发芽势、发芽率和发芽指数。结果：在25℃恒温光照培养条件下,千里光种子不萌芽;随着温度降低,发芽率由20℃时的4%升高到15℃时的13%;而室外变温条件下的发芽率高达76%。结论：千里光种子无休眠期,变化低温有助于提高千里光种子的发芽率。Objective：Parameters of germination were analyzed in the present study so that the criterions and methods would be applied to improve genetic breed and standardization in Senecio scandens Buch-Ham.Methods：Three separate groups of Senecio scandens Buch-Ham were placed in stable temperature（25,20 and 15℃）,in addition to the forth group at unstable temperature（4~20℃）.Three parameters involved in germination rate,germination potential and germination index were detected in four groups,as described above.Results：Seed germination rat ascended from 0% to 13%,temperature descending from 25 to 15.Notably,76% germination rat was observed on the condition of unstable temperature in Senecio scandens Buch-Ham.Conclusion：Seed dormancy did not appear in Senecio scandens Buch-Ham,and unstable temperature would contribute to increase its germination rate.

关 键 词：千里光 种子 发芽 

分 类 号：R28[医药卫生—中药学]