| 孟玲玲， 张鸽香.美国流苏种子休眠原因探析[J].广东农业科学,2015,42(6):30-34 |
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美国流苏种子休眠原因探析 |
| Causes of dormancy of Chionanthus virginica seed |
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| DOI： |
| 中文关键词: 美国流苏 种子 休眠 |
| 英文关键词: Chionanthus virginica seed dormancy |
| 基金项目: |
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| 摘要点击次数: 1584 |
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| 中文摘要: |
| 美国流苏种子具有休眠特性， 在自然状态下需要 18 个月才能萌发成苗。 为了解美国流苏
（Chionanthus virginica）种子休眠的原因，对美国流苏种子进行形态观察、种胚生活力测定、种子透水性测定以
及种子各部分抑制物的生物学测定等研究。 结果表明，美国流苏种子生活力较高，且各部分提取液随着浓度的
增加对白菜籽的抑制作用也增加，胚乳部分的抑制作用最为显著。 由上述结果推测，美国流苏种子萌发潜力较
高，休眠的主要原因是胚乳中存在抑制物质；其次是种胚自身具有一定的休眠特性；另外，种壳具有一定的通
透性，对种子对外界环境条件中氧气、水分等的吸收影响不大，且种壳提取液对白菜种子的抑制作用不显著，
所以种壳不是种子休眠的主要原因。 |
| 英文摘要: |
| Chionanthus virginica seed has the characteristic of dormancy and usually takes 18 months to
germinate in nature. In order to understand the causes of seed dormancy, this paper carried out the observation of
shape，determination of embryo viability and water permeability and seed parts inhibitor bioassay test. The results
showed that，the viability of seed was high，and the inhibitory effect of each part of extracts on cabbage increased
with concentration increasing, and the inhibition effect of endosperm was most obvious. Launched by the above
results，C. virginica seed germination potential was high，and the main causes of seed dormancy may be that there
were inhibitory substances in endosperm and embryo had dormancy. The lignified seed shell had a little effect on the
absorption of oxygen and water the inhibitory substances in shell had no significant effect on the seed dormancy, so it
was not the main reason for seed dormancy. |
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