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Growth inhibition of the eight species of microalgae by growth inhibitor from the culture of Isochrysis galbana and its isolation and identification

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Abstract

A type of growth inhibitor was successfully isolated and purified from cell-free filtrates of cultural medium at the death phase of Isochrysis galbana, and its chemical structure was confirmed by the methods of FABMS, UV, 1H-NMR, 13C-NMR and 2D NMR, which was 1-[hydroxyl-diethyl malonate]-isopropyl dodecenoic acid, C22H38O7. The results showed that the growth-inhibitor strongly inhibited the growth of Isochrysis galbana, and the growth of the eight species of microalgae (Dunaliella salina, Platymonas elliptica, Chlorella vugralis, Nitzschia closterium, Chaetoceros muelleri, Chaetoceros gracilis, Nitzschia closterium minutissima, Phaeodactylum tricornutum) also could be regulated by the growth-inhibitor in a concentration-dependent manner. The further investigation found that the synthesis process of chlorophyll and protein in the cells of all test microalgae could be inhibited by the growth inhibitor, and the content of chlorophyll and protein significantly decreased.

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Acknowledgment

This work was supported by the key project of the National 10th Five-Year Plan Program (2001BA707B03).

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Authors and Affiliations

  1. School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian, 116024, People’s Republic of China

    Sun Yingying & Wang Changhai

  2. School of Ocean, Yantai University, Yantai, 264005, People’s Republic of China

    Wang Changhai & Chen Jing

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  1. Sun Yingying
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  2. Wang Changhai
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  3. Chen Jing
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Correspondence to Wang Changhai.

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Yingying, S., Changhai, W. & Jing, C. Growth inhibition of the eight species of microalgae by growth inhibitor from the culture of Isochrysis galbana and its isolation and identification. J Appl Phycol 20, 315–321 (2008). https://doi.org/10.1007/s10811-007-9255-7

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  • DOI: https://doi.org/10.1007/s10811-007-9255-7

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