黄花风铃木种子活力快速丧失及多胚苗现象  

The rapid loss of Tabebuia chrysantha seed vigor and occurrence of polyembryonic seedlings

作　　者：黄雪梅[1] 杨彩群[1] 陈之红[1] 陈妙贤[2] 黄启聪[1] 陈科文[1] 

机构地区：[1]华南农业大学园艺学院,广东广州510642 [2]广州市园林科学研究所,广东广州510405

出　　处：《广东农业科学》2012年第12期50-52,共3页Guangdong Agricultural Sciences

摘　　要：首次研究了黄花风铃木〔Tabebuia chrysantha(Jacq.)Nichols〕种子的贮藏特性及多胚苗发生规律。结果表明,黄花风铃木种子种皮轻薄具薄翅,千粒重12.1 g,含水量7.8%,发芽率87%,在常温25℃下保存45 d即完全失去活力。15℃以下低温适宜种子的活力保持,贮藏180 d后发芽率高达87%～100%,苗重和简化活力指数有所提高。新鲜种子多胚苗发生率高达67.5%,15℃贮藏180 d后多胚苗率仍保持56.7%;多胚种子产生2～6株多胚苗,其中以2～3胚苗居多。This article primarily studied the storage properties of Tabebuia chrysantha seeds and the characteristics of polyembryonic seedlings. The results indicated that Tabebuia chrysantha seeds were light with thin seed coads, and the thousand-grain weight was 12.1 g. The water content was 7.8% and the seed germination percentage was 87%. The seeds lost vigor totally stored at room temperature 25℃ for 45 days. The optimum temperature for high seed vigor maintenance was below 15qC, the germination percentage were as high as 87%- 100%, the seedling weight and the vigor index increased after 180 days storage. The occurrence rate of polyembryonic seedlings of fresh seeds was as high as 67.5%, maintaining 56.7% after 180 days storage at 15℃. The polyembryonic seeds produced 2 to 6 seedlings, mostly 2 to 3.

关 键 词：黄花风铃木种子 活力丧失 贮藏温度 多胚苗 

分 类 号：S685.99[农业科学—观赏园艺]