Impact of Algicidal Bacillus mycoides on Diatom Ulnaria acus from Lake Baikal

Bedoshvili, Yekaterina; Bayramova, Elvira; Sudakov, Nikolay; Klimenkov, Igor; Kurilkina, Maria; Likhoshway, Yelena; Zakharova, Yulia

doi:10.3390/d13100469

Open AccessArticle

Impact of Algicidal Bacillus mycoides on Diatom Ulnaria acus from Lake Baikal

by

Yekaterina Bedoshvili

^†

,

Elvira Bayramova

^*,†,

Nikolay Sudakov

^†

,

Igor Klimenkov

^†,

Maria Kurilkina

^†,

Yelena Likhoshway

^†

and

Yulia Zakharova

^†

Department of Cell Ultrastructure, Limnological Institute, Siberian Branch of the Russian Academy of Sciences, 664033 Irkutsk, Russia

^*

Author to whom correspondence should be addressed.

^†

The authors have an equal contribution to the study.

Diversity 2021, 13(10), 469; https://doi.org/10.3390/d13100469

Submission received: 1 August 2021 / Revised: 21 September 2021 / Accepted: 24 September 2021 / Published: 27 September 2021

(This article belongs to the Special Issue Freshwater Siliceous Microeukaryotes)

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Abstract

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.

Keywords: diatoms; algicidal bacteria; Bacillus mycoides; TUNEL

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MDPI and ACS Style

Bedoshvili, Y.; Bayramova, E.; Sudakov, N.; Klimenkov, I.; Kurilkina, M.; Likhoshway, Y.; Zakharova, Y. Impact of Algicidal Bacillus mycoides on Diatom Ulnaria acus from Lake Baikal. Diversity 2021, 13, 469. https://doi.org/10.3390/d13100469

AMA Style

Bedoshvili Y, Bayramova E, Sudakov N, Klimenkov I, Kurilkina M, Likhoshway Y, Zakharova Y. Impact of Algicidal Bacillus mycoides on Diatom Ulnaria acus from Lake Baikal. Diversity. 2021; 13(10):469. https://doi.org/10.3390/d13100469

Chicago/Turabian Style

Bedoshvili, Yekaterina, Elvira Bayramova, Nikolay Sudakov, Igor Klimenkov, Maria Kurilkina, Yelena Likhoshway, and Yulia Zakharova. 2021. "Impact of Algicidal Bacillus mycoides on Diatom Ulnaria acus from Lake Baikal" Diversity 13, no. 10: 469. https://doi.org/10.3390/d13100469

APA Style

Bedoshvili, Y., Bayramova, E., Sudakov, N., Klimenkov, I., Kurilkina, M., Likhoshway, Y., & Zakharova, Y. (2021). Impact of Algicidal Bacillus mycoides on Diatom Ulnaria acus from Lake Baikal. Diversity, 13(10), 469. https://doi.org/10.3390/d13100469

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Impact of Algicidal Bacillus mycoides on Diatom Ulnaria acus from Lake Baikal

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