| PANG Shaojun,SHAN Tifeng. 2008. Zoospores of Undaria pinnatifida: their efficiency to attach under different water velocities and conjugation behavior during attachment. Acta Oceanologica Sinica, (6):94－101 |
| Zoospores of Undaria pinnatifida: their efficiency to attach under different water velocities and conjugation behavior during attachment |
| Zoospores of Undaria pinnatifida: their efficiency to attach under different water velocities and conjugation behavior during attachment |
| Received:August 23, 2007 Revised:March 21, 2008 |
| DOI： |
| Key words:Undaria pinnatifida zoospore attachment water velocity fertilization |
| 中文关键词: Undaria pinnatifida zoospore attachment water velocity fertilization |
| 基金项目:The "863" Hi-Tech Research and Development Program of China under contract No. 2006AA10A412 and a project from the Chinese Academy of Sciences under contract No. KSCX2-YW-N-47-07. |
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| Abstract: |
| In the invading course of Undaria pinnatifida, zoospore attachment in a dynamically changed subtidal water environment is crucial for the establishment of a potential population in alien waters. Among many abiotic factors that may interfere with the attachment process, water velocity is the most important one. In this investigation, the effect of water velocity on zoospore attachment of U. pinnatifida was investigated in an artificially designed system. It was found that freshly released zoospores that were transported by water flowing at 0~16 cm/s showed no difficulty in attaching the smooth surface. Zoospore attachment decreased at elevated water flowing rates. At 70 cm/s no spore attachment occurred. Spores that have settled on glass slide for up to 1 h could not be stripped away by flowing water at a rate of 129 cm/s, the same was true of the 20 d old filamentous gametophytes. It was found that more than 70% of free-swimming zoospores tended to settle down adjacent to the settled spores and formed conjugated clusters from two up to a few hundred cells in still culture. |
| 中文摘要: |
| In the invading course of Undaria pinnatifida, zoospore attachment in a dynamically changed subtidal water environment is crucial for the establishment of a potential population in alien waters. Among many abiotic factors that may interfere with the attachment process, water velocity is the most important one. In this investigation, the effect of water velocity on zoospore attachment of U. pinnatifida was investigated in an artificially designed system. It was found that freshly released zoospores that were transported by water flowing at 0~16 cm/s showed no difficulty in attaching the smooth surface. Zoospore attachment decreased at elevated water flowing rates. At 70 cm/s no spore attachment occurred. Spores that have settled on glass slide for up to 1 h could not be stripped away by flowing water at a rate of 129 cm/s, the same was true of the 20 d old filamentous gametophytes. It was found that more than 70% of free-swimming zoospores tended to settle down adjacent to the settled spores and formed conjugated clusters from two up to a few hundred cells in still culture. |
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