| 摘要: |
| 珍稀濒危植物丹霞梧桐（Firmiana danxiaensis）种子存在硬实休眠现象，自然条件下，发芽率极低。试验通过高温浸种（80 ℃）、变温浸种、机械损伤、酸蚀处理和激素处理等不同方法破除其休眠机制。结果表明，除激素处理对破除丹霞梧桐种子休眠无明显作用以外，其他处理均能显著提高其萌发率；其中，酸蚀 20 min 效果最好，丹霞梧桐种子萌发率为 82.29%，发芽势 78.13%，发芽指数 4.59；高温浸种次之，萌发率为 77.52%，发芽势为 68.99%，发芽指数为 3.71。研究表明酸蚀 20 min 和高温浸种能显著促进丹霞梧桐种子萌发。 |
| 关键词: 丹霞梧桐 种子 萌发特性 高温浸种 酸蚀 |
| DOI： |
| 投稿时间：2018-07-15修订日期：2018-09-06 |
| 基金项目:中央财政专项林业项目（珍稀濒危植物丹霞梧桐野外救护与繁育），广东省林业科技创新项目（2017KJCX018） |
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| Study on the Characteristics of Seed Germination of the Endangered Plant Firmiana danxiaensis |
| zhang wei,Huang Ya ting,Zhong Ping Sheng,He Xiang yang,Chen Hong-feng |
| (Zhongkai University of Agriculture and Engineering Guangzhou;. Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences Guangzhou;Forestry Bureau of Nanxiong, Nanxiong;Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650) |
| Abstract: |
| The seeds of the rare and endangered plant —Firmiana danxiaensis, what have hard seeds dormancy phenomenon. Under natural conditions, the germination rate of seed is extremely low. In this study, the dormancy mechanism was eliminated by different seeds treatments, such as immersion in high temperature water (80 ℃ ), immersion in alternating temperature, mechanical damage, acid etching, and hormone treatment. The results indicated significantly improved germination rates except for the treatment of hormones. The effect of acid etching for 20 min was the most efficient, with the germination rate of 82.29%, the germination potential of 78.13%, and the germination index as 4.59. The second-best treatment was immersion in hot water, with the germination rate of 77.52%, the germination potential of 68.99%, and the germination index as 3.71. The study indicated that immersion in high temperature water (80 ℃ )and acid etching could promote the seed germination of F. danxiaensis . |
| Key words: Firmiana danxiaensis seed germination characteristics immersion in high temperature water acid etching |
