沙葱种皮特性、种胚及种子浸提液与种子休眠的关系

王晓娟, 张凤兰, 杨忠仁, 郝丽珍*
内蒙古农业大学农学院, 内蒙古自治区野生特有蔬菜种质资源与种质创新重点实验室, 呼和浩特010019

通信作者:郝丽珍;E-mail: haolizhen_1960@163.com;Tel: 0471-4318467

摘 要:

本文以沙葱休眠种子为试材, 检测其种皮透水性、透气性、超微结构、种胚休眠及种子浸提液。结果表明, 酸蚀种 子吸水12 h达饱和, 吸水率是完整种子的2倍; 其呼吸强度最大值是完整种子的1.36倍。酸蚀处理使种子表面结构破损, 角 质层脱落, 种孔露出。沙葱种子离体胚接种培养后2~3 d, 种胚开始萌发, 萌发率达85%。沙葱完整种子与粉碎种子的浸提 液对白菜种子发芽率、苗高、根长均有抑制作用, 且随着浓度的提高而增强。

关键词:沙葱; 种子; 种子浸提液; 休眠

收稿:2011-02-28   修定:2011-05-13

资助:国家自然科学基金(30660110)和教育部科学技术研究重点项目(206027)

Relationship between Characteristic of Allium mongolicum Seed Coat, Embryo, Seed Leach Liquor and Seed Dormancy

WANG Xiao-Juan, ZHANG Feng-Lan, YANG Zhong-Ren, HAO Li-Zhen*
College of Agronomy, Inner Mongolia Agriculture University, Inner Mongolia Key Laboratory of Germplasm and Germplasm Enhancement of Wild and Special Vegetable, Hohhot 010019, China

Corresponding author: HAO Li-Zhen; E-mail: haolizhen_1960@163.com; Tel: 0471-4318467

Abstract:

The water permeability, air permeability, seed coat ultrastructure, embryo dormancy and seed leach liquor of Allium mongolicum seed were determineed. The results showed that etched seed was saturated with water after 12 h, its water absorption rate was twice that of the whole seed, and its respiration intensity maximum was 1.36 times of the whole seed. Etching damaged the seed surface structure, made the cuticle shedding and micropyle exposed. The in vitro embryo of Allium mongolicum seed began to germinate after culture inoculation of 2-3 d, and germination rate reached 85%. The leach liquor of the whole and etched seed both had an inhibiting effect on the germination rate, seedling height and root length of Chinese cabbage. As the concentration increased, the inhibition enhanced.

Key words: Allium mongolicum; seed; seed leach liquor; dormancy

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