Impact of Algicidal Bacillus mycoides on Diatom Ulnaria acus from Lake Baikal
| Autor: | Yekaterina D. Bedoshvili, Yulia R. Zakharova, Nikolay P. Sudakov, Elvira Bayramova, Yelena V. Likhoshway, I. V. Klimenkov, Maria I. Kurilkina |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Ecology
biology Strain (chemistry) QH301-705.5 Chemistry Ecological Modeling Aquatic ecosystem algicidal bacteria Bacillus mycoides biology.organism_classification 16S ribosomal RNA Agricultural and Biological Sciences (miscellaneous) diatoms Diatom Botany Ultrastructure DNA fragmentation Biology (General) Bacteria TUNEL Nature and Landscape Conservation |
| Zdroj: | Diversity Volume 13 Issue 10 Diversity, Vol 13, Iss 469, p 469 (2021) |
| ISSN: | 1424-2818 |
| DOI: | 10.3390/d13100469 |
| Popis: | Algae–bacteria interactions play an important role in water ecosystems. In this work, the BS2-15 algicidal strain was isolated from the bottom sediments of Lake Baikal and identified as Bacillus mycoides on the basis of 16S rDNA sequencing, its described ultrastructure, and biochemical properties. B. mycoides BS2-15 was demonstrated to have a strong algicidal effect against a freshwater diatom culture of Ulnaria acus, inhibiting its growth and increasing frustules fragility. By analyzing the impact of bacterial filtrate onto the cells of U. acus, we demonstrated that perhaps an algicidal compound is produced by bacteria independently in the presence of diatoms in a medium. Using methods of TUNEL and confocal microscopy, we revealed that the bacterial algicidal effect on the diatom cells results in DNA fragmentation, nucleus destruction, and neutral lipid accumulation. This phenomenon highlights the complexity of algae–bacteria interactions and their potential role in regulating water ecosystem microbial populations. |
| Databáze: | OpenAIRE |
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