温度及赤霉素处理对兰香草种子萌发特性的影响  

Effects of Temperature and Gibberellin Treatment on Seed Germination Characteristics of Caryopteris incana(Thunb.) Miq.

作　　者：史小华 马广莹 金亮 邹清成 Shi Xiaohua;Ma Guangying;Jin Liang;Zou Qingcheng(Zhejiang Institute of Landscape Plants and Flowers,Hangzhou,311251)

机构地区：[1]浙江省园林植物与花卉研究所,杭州311251

出　　处：《分子植物育种》2021年第16期5522-5527,共6页Molecular Plant Breeding

基　　金：浙江省杭州市农业科研攻关专项(20150432B37);浙江省萧山区重大科技计划项目(2018228)共同资助。

摘　　要：兰香草(Caryopteris incana (Thunb.) Miq.)作为莸属的广布种,是优良的观赏、蜜源和药用植物。本研究在对兰香草种子的长、宽、千粒重及吸水性能测定的基础上,探索不同温度和不同浓度赤霉素处理对种子萌发的影响。结果表明:兰香草种子的平均长度、宽度分别为2.43 mm和1.94 mm,千粒重为0.57 g;兰香草种子在吸水4 h后达到饱和;兰香草种子在15℃~30℃均可萌发,在35℃以上基本不萌发,20℃~25℃最适宜种子萌发;赤霉素处理可显著提高兰香草的萌发率,尤其是在低温(15℃)和高温(35℃)的条件下,可用100~200 mg/L的赤霉素处理提高种子萌发率,缩短种子的萌发周期。本研究为兰香草的播种繁殖提供重要的理论支撑,也为以后兰香草推广种植和品种改良培育等方面提供理论基础。Caryopteris incana(Thunb.) Miq. is an excellent ornamental, nectariferous plant and medicinal plant as a widely distributed species of the Caryopteris. Based on the determination of the length, width, 1 000-grain weight and water absorption of vanilla seeds, the effects of gibberellin treatment on seed germination were explored. The results showed that the average length and width of the seeds were 2.43 mm and 1.94 mm. The 1 000-grain weight of the seeds was 0.57 g. The seed reached saturation after 4 hours of water absorption. Seeds can germinate at 15 ℃~30 ℃ and hardly germinated above 35 ℃. The optimal temperature for germination is 20 ℃~25 ℃. Gibberellin treatment can significantly improve the germination rate of Cyperus angustifolia, especially under the conditions of low temperature(15 ℃) and high temperature(35 ℃), 100~200 mg/L gibberellin treatment can improve the germination rate and shorten the germination period of the seeds. This study provides important theoretical support for the sowing and propagation of C. incana, and the theoretical basis for the planting and breed improvement of C. incana in the future.

关 键 词：兰香草 种子 温度 赤霉素 萌发 

分 类 号：S682.19[农业科学—观赏园艺]