| 摘要: |
| 为探讨中国无忧花 Saraca dives 种子的脱水敏感性和顽拗性, 以成熟种子为材料, 研究了脱水
处理对种子萌发的影响。 将中国无忧花种子进行风干脱水处理, 测定种子的千粒重、 含水量、 发芽率及丙
二醛 (MDA)、 可溶性糖含量、 过氧化氢酶 (CAT)、 超氧化物歧化酶 (SOD) 活性。 结果显示: 脱水程
度越高, 种子的发芽率逐渐降低; 丙二醛含量快速上升, 后来由于可溶性糖的渗透调节及激活 SOD、
CAT 等酶保护系统, 其含量逐渐下降但仍维持在较高水平。 脱水后期, 由于膜系统被破坏和酶保护系统
超过极限, 对种子造成了严重伤害。 中国无忧花主要分布在热带、 亚热带地区; 种子千粒重高; 含水量
高; 具有明显脱水敏感性。 这些特征表明: 中国无忧花种子为典型的顽拗性种子, 在种子储存和生产繁育
中应予以重视。 |
| 关键词: 中国无忧花 顽拗性 种子储存 |
| DOI： |
| 分类号: |
| 基金项目:深圳城管局科研项目（202204） |
|
| The Effect of Dehydration Treatment on the Germination of Saraca dives Seeds |
|
xuguihong, DU Jingjing
|
|
Shenzhen Fairy Lake Botanical Garden
|
| Abstract: |
| To investigate the dehydration sensitivity and recalcitrance of Saraca dives seeds, the effects of
dehydration treatment on seed germination were studied with mature seeds as materials. The seeds of S. dives
were air-dried and dehydrated, and the 1 000 grain weight, water content, germination rate, Malondialdehyde
(MDA), soluble sugar content, Catalase (CAT), Superoxide dismutase (SOD) activities of the seeds were
measured. The results showed that the higher the degree of dehydration, the lower the germination rate of the
seeds. The content of Malondialdehyde increased rapidly. Later, through the osmotic regulation of soluble sugar
and the activation of SOD, CAT and other enzyme protection systems, the content gradually decreased but remained at a high level. In the later stage of dehydration, the membrane system was damaged and the enzyme
protection system exceeded its limit, causing serious damage to the seeds. The S. dives were mainly distributed
in tropical and subtropical regions, with high thousand seed weight, high water content, and obvious dehydration sensitivity. These characteristics indicate that S. dives seeds were typically recalcitrant and should be taken
seriously in seed storage and production |
| Key words: Saraca dives recalcitrant seed seed storage |
