| 摘要: |
| 为了探索红树林胎生红树植物繁殖体特征与繁殖扩散的关系，分析对比我国3种最常见胎生红树植物（白骨壤Avicennia marina、桐花树Aegiceras corniculatum和木榄 Bruguiera gymnorhiza）的繁殖体质量、长度、体积和密度，并利用室内漂浮和繁殖体萌发实验探究其在不同盐度下的漂浮性和萌发状态。结果研究发现，3种红树植物的繁殖体密度均略小于1 g/cm3；在不同盐度下，白骨壤繁殖体的漂浮性存在显著差异，萌发率高且萌发时间远早于木榄；而桐花树繁殖体具有下沉性且漂浮性差，部分桐花树繁殖体仅在实验结束后才长出根系；木榄繁殖体则表现出极好的漂浮性（均>85 %），低盐条件下萌发率高。结果表明以上说明，白骨壤繁殖体具有极强的适应性，木榄繁殖体的强漂浮性为其作为广布种提供了基础支撑 。总体而言，胎生红树植物的繁殖体自身形态、漂浮性、萌发状态等特征 ，对红树林的繁殖定植产生有很大影响。本实验结果有助于解释红树植物的繁殖扩散，对于红树林的保护和恢复有较重要的意义。 |
| 关键词: 红树林、红树植物、胎生、漂浮率、繁殖定植 |
| DOI： |
| 投稿时间：2024-06-05修订日期：2024-10-23 |
| 基金项目:广西红树林研究中心基本科研业务费项目（2023GMRC-02、2023GMRC-03） |
|
| The relationship between the characteristics of viviparous mangrove propagules and their reproductive and dispersal mechanisms |
|
PAN Liang-hao1, MO Zuying2, SHI Xiao-fang1
|
| (1.Guangxi Key Lab of Mangrove Conservation and Utilization, Guangxi Mangrove Research Center, Guangxi Academy of Marine Sciences;2.Beihai Experimental School,Beihai,China) |
| Abstract: |
| To explore the relationship between the characteristics of propagules of viviparous mangrove plants and their reproductive dispersal, this study analyzed and compared the propagule mass, length, volume, and density of three common viviparous mangrove species in China: To explore the characteristics of propagules of viviparous mangrove plants (shape, size, density, etc.), the relationship between their salt tolerance and germination, and their reproductive and dispersal mechanisms, we measured and compared the characteristics of propagules (mass, length, volume, and density) of the three most common viviparous mangrove plants in China (Avicennia marina, Aegiceras corniculatum, and Bruguiera gymnorhiza). Indoor floating and germination experiments were conducted to investigate their floating ability and germination status under different salinities. The results showed that the density of propagules from all three mangrove species was slightly less than 1 g/cm3. Under different salinities, the floating ability of Avicennia marina propagules varied significantly, with a high germination rate and much earlier germination time compared to Bruguiera gymnorhiza. In contrast, Aegiceras corniculatum propagules were prone to sinking and had poor floating ability, with some propagules only developing roots after the experiment ended. Bruguiera gymnorhiza propagules, on the other hand, exhibited excellent floating ability (all >85 %) and had a higher germination rate under low salinity conditions. The results indicate that Avicennia marina propagules have strong adaptability, and the strong floating ability of Bruguiera gymnorhiza propagules provides a foundational support for its widespread distribution. Overall, the morphology, floating ability, and germination status of propagules from viviparous mangrove plants have a significant impact on the reproduction and establishment of mangrove forests. The results of this experiment help to explain the reproductive dispersal of mangrove plants and are of considerable significance for the conservation and restoration of mangrove forests. |
| Key words: Mangrove Forest, Mangrove Plant, Viviparous, Floating rateBuoyancy Rate, Reproduction and Establishment |
