期刊
MICROBIOLOGYOPEN
卷 5, 期 6, 页码 1038-1049出版社
WILEY
DOI: 10.1002/mbo3.387
关键词
alginate oligosaccharide; Bacillus litoralis; biofertilizer; fermentation; Sargassum horneri
类别
资金
- Science and Technology Development Project of Weihai [2010-3-96]
- National Key Technology R&D Program of China [2013BAB01B0]
- Science and Technology Service Network Initiative of Chinese Academy of Sciences [KFJ-EW-STS-060]
- Young Scientists Fund of National Natural Science Foundation of China [41401285]
- Open Foundation of State Key Laboratory of Estuarine and Coastal Research [SKLEC-KF201412]
- Public Science and Technology Research Funds Projects of Ocean [201505022]
- Chinese Academy of Sciences Strategic Pilot Project [XDA1102040300]
Algae have long been used to augment plant productivity through their beneficial effects. Alginate oligosaccharide is believed to be one of the important components to enhance growth and crop yield. In this study, we isolated and characterized a Bacillus litoralis strain, named Bacillus M3, from decayed kelps. We further demonstrated that the M3 strain could secrete alginate lyase to degrade alginate. The crude enzyme exhibited the highest activity (33.74 U/mg) at pH 7.0 and 50 degrees C. The M3 strain was also able to ferment the brown alga Sargassum horneri. Fermentation results revealed that a fermentation period of 8-12hr was the best harvest time with the highest level of alginate oligosaccharides. Plant growth assay showed that the seaweed fermentation extract had an obvious promotion effect on root and seedling growth of Lycopersicon eseulentum L. Our results suggest that fermentation extract of Sargassum horneri by the novel strain of Bacillus litoralis M3 has significant development potential for biofertilizer production and agriculture application.
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