| 黄山花楸种子休眠影响因素 |
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| 引用本文： | 陈昕,曹珊珊,张红星.黄山花楸种子休眠影响因素[J].东北林业大学学报,2010,38(7). |
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| 作者姓名： | 陈昕 曹珊珊 张红星 |
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| 作者单位： | 南京林业大学,南京,210037;南京林业大学,南京,210037;南京林业大学,南京,210037 |
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| 摘 要： | 对黄山花楸(Sorbus amabilis)种子休眠的解剖结构基础与影响条件进行了试验研究。结果表明:黄山花楸种子由种皮和胚2部分组成。胚形态发育完全,种皮表面覆一层角质层,胚根端和子叶端的种皮细胞排列明显比中间部位密集;种子透水性障碍不明显而透气性障碍显著;未处理的完整种子萌发率为0,种胚、种胚去除不同量子叶处理萌发率为86.67%～96.67%;种子去除不同部位种皮的萌发率在90%以上。表明黄山花楸种胚无休眠,种皮透性、特别是透气性对休眠有一定影响,种子休眠主要是种皮的机械障碍引起的物理休眠。
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| 关 键 词： | 黄山花楸 种子休眠 离体胚萌发 种皮 机械障碍 |
Influencing Factors on Seed Dormancy of Sorbus amabilis |
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| Chen Xin,Cao Shanshan,Zhang Hongxing.Influencing Factors on Seed Dormancy of Sorbus amabilis[J].Journal of Northeast Forestry University,2010,38(7). |
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| Authors: | Chen Xin Cao Shanshan Zhang Hongxing |
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| Institution: | Chen Xin,Cao Shanshan,Zhang Hongxing(School of Forest Resources , Environment,Nanjing Forestry University,Nanjing 210037,P. R. China) |
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| Abstract: | Dissection structure and factors influencing seed germination of Sorbus amabilis were studied. Results show that the seed of S. amabilis is composed of seed coat and well-developed embryo,and the embryo appears to be morphologically complete. The surface of seed coat is covered by a layer of keratinized cells,and cuticle cells in radicle and cotyledons tips are markedly denser than those in the middle parts. An unobvious water-permeable barrier and an obvious gas impermeable barrier were observed in seed co... |
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| Keywords: | Sorbus amabilis Seed dormancy Isolated embryo germination Seed coat Mechanical obstruction |
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