文献类型：期刊文献

中文题名：云南红豆杉种子贮藏过程中胚的变化

英文题名：The Change of Embryo during the Seeds of Taxus yunnanensis Conserved in Sand

作者：王兵益[1] 苏建荣[1] 张志钧[1]

第一作者：王兵益

机构：[1]中国林业科学研究院资源昆虫研究所

年份：2009

卷号：22

期号：1

起止页码：26-28

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：中国科技部科研院所社会公益研究专项资助(2004DIB3J104);中国科技部十五科技支撑项目资助(2006BAD18B03);加拿大阿尔伯塔大学益客基金会资助;中国林业科学研究院资源昆虫研究所所长基金(riri200703Z;Riricaf200804M)资助

语种：中文

中文关键词：云南红豆杉;种子;胚;萌发率

外文关键词：Taxus yunnanensis ; seeds ; embryo ; germination rate

分类号：S722.17

摘要：采用显微测量、石蜡切片和离体培养法研究了云南红豆杉种子在贮藏过程中胚的长度、结构和萌发率的变化,结果显示:新鲜种子胚的长度差异明显,在种子贮藏过程中胚的长度变化不明显;多数情况下,成熟种子的胚分化完全,在种子贮藏过程中胚的结构没有发生明显变化;在离体培养中,新鲜种子胚在2周左右萌发,萌发率为70%,随着贮藏时间的延长,胚的萌发率会逐渐降低。因此推测种子休眠不是由胚的生物学特性引起的;胚在种子中能较长时间的保持活力,这是长期适应的结果,但却是以损失萌发率为代价的。
The length variation, structure and seeds that conserved in sand were studied by germination rate of embryo in Taxus yunnanensis Cheng et L. K. Fu paraffin section and being cultured in vitro. The results are as follows. Their length varied greatly, and did not change as seeds were conserved in sand. Most embryos developed completely in mature seeds, and the embryo structure did not change as seeds were stored in sands. In vitro, embryos from the fresh seeds germinated in 2 weeks, and the germination rate was 70%, but the germination rate declined as seeds were stored in sand. It can be concluded that biologic characters of embryos is not a reason for seed dormancy in Taxus yunnanensis. Its embryo can keep alive in seeds for long time, which may be resulted from adaptation, but its germination rate will decrease with the store time prolonged.