A bacterial pathogen infecting gametophytes of Saccharina japonica (Laminariales, Phaeophyceae) |
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Authors: | PENG Yanting LI Wei |
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Institution: | 1. College of Marine Life Science, Ocean University of China, Qingdao 266003, China 2. College of Marine Life Science, Ocean University of China, Qingdao 266003, China;Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071,China |
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Abstract: | A newly identified bacterial disease of kelp (Saccharina japonica) gametophytes was found in clone cultures. It is characterized by swollen gametophyte cells in the early period of infection followed by filamentous fading. An alginolytic marine bacterium referred to as A-1 was isolated from the diseased gametophytes. On the basis of 16S rDNA sequencing and morphological, physiological and biochemical characteristics, the bacterium was identified as a strain of the genus Alteromonas. By testing Koch’s postulates, Alteromonas sp. A-1 was further confirmed as the pathogen. The infection process was also investigated using both scanning electron and light microscopy. |
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Keywords: | Saccharina japonica gametophyte pathogen bacteria Alteromonas |
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