Improvement of the zygote utilization and reduction of the seedling loss in the early stage of seedling production of <Emphasis Type="Italic">Sargassum thunbergii</Emphasis> (Fucales,Phaeophyta) |
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| Authors: | Wei Liu Haiyi Wu Mengxia Liu Delin Duan |
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| Institution: | 1.Institute of Oceanology,Chinese Academy of Sciences,Qingdao,China;2.University of Chinese Academy of Sciences,Beijing,China;3.Marine Biology Institute of Shandong Province,Qingdao,China |
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| Abstract: | Artificial seedling production of Sargassum thunbergii is an effective way to relieve pressure on natural resources. In order to improve the utilization of zygotes and reduce the loss of seedlings, studies on the characteristic of the zygotes release, the development of rhizoids, the attachment of germlings, and the influence of jet washing were conducted. Results show that the percent of zygotes released was increased with time in the first 60 h. The capacity of germlings attached to the substratum was significantly increased, especially coincident with the time of the new rhizoids emerged and elongated. The detachment rate of germlings significantly decreased with the delay of starting time of jet washing or the reduction of jet washing velocity. However, the jet washing at any level applied in the experiment could cause considerable loss of germlings within the 20 days after the attachment. Our study provided some parameters to optimize the operation in the early stage of seedling production. |
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