Diversity of culturable alginate lyase-excreting bacteria associated with <i>Sargassum</i>

Xiaomeng Sun; Zhao Xue; Cui Chen; Shoujin Fan; Huihui Fu; Peng Wang

doi:10.1007/s13131-022-2095-0

Volume 42 Issue 6

Jun. 2023

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Article Navigation > Acta Oceanologica Sinica > 2023 > 42(6): 70-77

Xiaomeng Sun, Zhao Xue, Cui Chen, Shoujin Fan, Huihui Fu, Peng Wang. Diversity of culturable alginate lyase-excreting bacteria associated with Sargassum[J]. Acta Oceanologica Sinica, 2023, 42(6): 70-77. doi: 10.1007/s13131-022-2095-0

Citation:

Xiaomeng Sun, Zhao Xue, Cui Chen, Shoujin Fan, Huihui Fu, Peng Wang. Diversity of culturable alginate lyase-excreting bacteria associated with Sargassum[J]. Acta Oceanologica Sinica, 2023, 42(6): 70-77. doi: 10.1007/s13131-022-2095-0

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Diversity of culturable alginate lyase-excreting bacteria associated with Sargassum

doi: 10.1007/s13131-022-2095-0

Xiaomeng Sun^{1, 2},
Zhao Xue¹,
Cui Chen¹,
Shoujin Fan^{1
,
,},
Huihui Fu^{2
,
,},
Peng Wang²

1.
Life Science College, Shandong Normal University, Jinan 250014, China
2.
College of Marine Life Sciences/Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266003, China

Funds: The National Natural Science Foundation of China under contract Nos 32170127 and 42176156; the Fundamental Research Funds for the Central Universities under contract No. 202141006.

More Information

Corresponding author: Email: fansj@sdnu.edu.cn; xuanmo200404@126.com
Received Date: 2022-04-21
Accepted Date: 2022-08-12

Available Online: 2023-06-21

Publish Date: 2023-06-25

Abstract

Abstract

Large numbers of bacteria live on the surface of various brown algae and can produce alginate lyases to consume alginate, an important component of the cell wall of brown algae. Sargassum is a genus of the largest canopy-forming brown algae of more than 150 species, which are widely distributed in tropical and subtropical environments. However, our knowledge about the epiphytic bacteria and the alginate lyase-excreting bacteria from Sargassum is still primitive. Here, we investigated the diversity of the culturable epiphytic bacteria and alginate-degrading bacteria from Sargassum samples collected from the coastal seawaters of Shandong Province, China. In total, 37 strains belonging to 21 genera in 3 phyla were isolated, including 15 previously unreported genera, of which Vibrio (6/37) and Pseudoalteromonas (5/37) are the dominant genera. Eight strains, mainly Vibrio and Pseudoalteromonas species, were further identified as alginate lyase-excreting strains that can utilize alginate for growth. The extracellular alginolytic activity of the 8 strains was determined, and strains Vibrio sp. C42 and Pseudoalteromonas sp. M9 showed the highest activity. These results provide a better understanding of brown algae epiphytes and alginate-degrading bacteria, and are fundamental for further studies on the interactions between brown algae and their epiphytes.
- Sargassum,
- epiphyte,
- alginate lyase-excreting bacteria,
- alginolytic activity

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References(38)

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