Microprojectile bombardment of Laminaria japonica gametophytes and rapid propagation of transgenic lines within a bubble-column bioreactor |
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Authors: | Xiangyuan Deng Song Qin Qun Zhang Peng Jiang Yulin Cui Xiaokun Li |
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Affiliation: | (1) Institute of Oceanology, Chinese Academy of Sciences, 266071 Qingdao, People’s Republic of China;(2) Graduate University of Chinese Academy of Sciences, 100049 Beijing, People’s Republic of China;(3) Biopharmaceutical Research and Development Center, Jinan University, 510632 Guangzhou, People’s Republic of China |
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Abstract: | A human acidic fibroblast growth factor gene, hafgf, was successfully transferred into Laminaria japonica (kelp) gametophytes via microprojectile bombardment using the biolistic PDS-1000/He gene gun. Following phosphinothricin screening, PCR detection and Southern blot analysis, transgenic L. japonica gametophytes were cultivated in an illuminated bubble-column bioreactor to optimize growth conditions. A maximal final dry cell density of 1,695 mg l−1 was obtained in a batch culture having an initial dry cell density of 129.75 mg l−1. This was achieved using an aeration rate of 1.08 l air min−1 l−1 culture in a medium containing 1.5 mM inorganic nitrate and 0.15 mM phosphate. In addition, the relationship between different nitrogen sources and growth of transgenic gametophytes indicated that both urea and sodium nitrate were effective nitrogen sources for cell growth, while ammonium ions inhibited growth of these gametophytes. |
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Keywords: | Microprojectile bombardment Bubble-column bioreactor Laminaria japonica gametophytes Human acidic fibroblast growth factor |
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