摘要
铁筷子是毛茛科铁筷子属的多年生草本植物,是我国特有种。其干燥根和根茎可做药用,同时也是优良的观赏植物。本研究利用植物解剖法研究铁筷子种胚在层积处理下的发育过程和大小。结果表明采收期成熟的铁筷子种胚处于心形胚阶段,胚率为8.13%。在层积条件下种胚经历心形胚阶段和鱼雷胚阶段,最终发育至成熟的子叶胚,胚率为41.11%。铁筷子种胚存在严重的形态后熟现象,种胚发育不成熟是导致铁筷子种子休眠和萌发困难的一个重要因素。
Helleborus thibetanus is a perennial herbaceous plant of Helleborus(Ranunculaceae),which is a special species of China.The dried root and rhizome of H.thibetanus is a commonly used as traditional Chinese medicine,it is also an excellent ornamental plant.In this research,seed embryo morphological development and length of H.thibetanus were studied under stratification treatment by anatomy method.The results showed that H.thibetanus seed embryo was at heart-shaped embryo stage in harvest period,and the embryo rate was 8.13%.Under stratified condition,seed embryos went through heart-shaped embryo stage and torpedo embryo stage,finally,it developed into cotyledon embryo with embryo rate of 41.11%.The results suggested that the seed of H.thibetanus has serious morphological post-ripening phenomenon,and immature seed embryo is an important factor which can result in seed dormancy and germination difficulty.
作者
赵雪艳
王莉
王方圆
周亚福
李艳
ZHAO Xueyan;WANG Li;WANG Fangyuan;ZHOU Yafu;LI Yan(Shaanxi Engineering Research Centre for Conservation and Utilization of Botanical Resources,Xi’an Botanical Garden of Shaanxi Province(Institute of Botany of Shaanxi Province),Xi’an,Shaanxi 710061,China)
出处
《陕西农业科学》
2021年第8期56-58,共3页
Shaanxi Journal of Agricultural Sciences
基金
陕西省科学院科技计划项目(2020K-28
2021K-)
陕西省重点研发计划项目(2019NY-049)
西安市科技局农业技术研发项目(20NYYF0060)。
关键词
铁筷子
种胚、形态后熟
Helleborus thibetanus
Seed embryo
Morphological post-ripening
