Publications by authors named "Ivan Petrushin"

Every land plant exists in a close relationship with microbial communities of several niches: rhizosphere, endosphere, phyllosphere, etc. The growth and yield of potato-a critical food crop worldwide-highly depend on the diversity and structure of the bacterial and fungal communities with which the potato plant coexists. The potato plant has a specific part, tubers, and the soil near the tubers as a sub-compartment is usually called the "geocaulosphere", which is associated with the storage process and tare soil microbiome.

View Article and Find Full Text PDF

Previously, the main studies were focused on viruses that cause disease in commercial and farmed shellfish and cause damage to food enterprises (for example, , and ). Advances in high-throughput sequencing technologies have extended the studies to natural populations of mollusks (and other invertebrates) as unexplored niches of viral diversity and possible sources of emerging diseases. These studies have revealed a huge diversity of mostly previously unknown viruses and filled gaps in the evolutionary history of viruses.

View Article and Find Full Text PDF

Water scarcity and global warming make drought-tolerant plant species more in-demand than ever. The most drastic damage exerted by drought occurs during the critical growth stages of seed development and reproduction. In the course of their evolution, plants form a variety of drought-tolerance mechanisms, including recruiting beneficial microorganisms.

View Article and Find Full Text PDF

Short interrupted repeat cassette (SIRC)-a novel DNA element found throughout the nuclear genome. SIRCs are represented by short direct repeats interrupted by diverse DNA sequences. The maxima of SIRC's distribution are located within pericentromeric regions.

View Article and Find Full Text PDF

Sponges (phylum Porifera) are ancient, marine and inland water, filter feeding metazoans. In recent years, diseased sponges have been increasingly occurring in marine and freshwater environments. Endemic freshwater sponges of the Lubomirskiidae family are widely distributed in the coastal zone of Lake Baikal.

View Article and Find Full Text PDF

Sponges (type Porifera) are multicellular organisms that give shelter to a variety of microorganisms: fungi, algae, archaea, bacteria, and viruses. The studies concerning the composition of viral communities in sponges have appeared rather recently, and the diversity and role of viruses in sponge holobionts remain largely undisclosed. In this study, we assessed the diversity of DNA viruses in the associated community of the Baikal endemic sponge, , using a metagenomic approach, and compared the virome data from samples of sponges and Baikal water (control sample).

View Article and Find Full Text PDF

Our study was devoted to investigating the mass disease and mortality of freshwater sponges (Lubomirskiidae) in Lake Baikal. The first sights of the disease were discovered in 2011 and were associated with a shift in sponge microbial diversity. To study the microbiome, we performed sequencing of the 16S rRNA amplicon DNA extracted from the freshwater sponges.

View Article and Find Full Text PDF
Article Synopsis
  • The strain sp. SLB01 was isolated from a diseased freshwater sponge and its genome was previously published; this study aims to identify pathogenicity factors related to Baikal sponges.
  • Genomic analysis revealed SLB01 has multiple virulence-related genes, including those for violacein, hemolysin, and antibiotic resistance, indicating potential pathogenic capabilities.
  • Significant differences were observed in gene spectra between SLB01 and other strains, suggesting that SLB01 may be a key pathogen affecting freshwater sponges.
View Article and Find Full Text PDF

Lake Baikal is a unique oligotrophic freshwater lake with unusually cold conditions and amazing biological diversity. Studies of the lake's viral communities have begun recently, and their full diversity is not elucidated yet. Here, we performed DNA viral metagenomic analysis on integral samples from four different deep-water and shallow stations of the southern and central basins of the lake.

View Article and Find Full Text PDF

Rhizosphere bacteria are considered to be promising destructors of oil and its components. Bacterial species of the genus can degrade a variety of hydrocarbons and are widely used for the bioremediation of polluted environments. Here, we report the complete genome sequence of strain VKM Ac-2784D.

View Article and Find Full Text PDF

In recent years, Lake Baikal has undergone significant changes in the composition of coastal communities associated with the increasing anthropogenic influence and global climate changes. In this context, we carried out metagenomic sequencing of the DNA viral community of an integral near-bottom water sample from the littoral zone of the lake.

View Article and Find Full Text PDF

Endemic freshwater sponges (demosponges, Lubomirskiidae) dominate in Lake Baikal, Central Siberia, Russia. These sponges are multicellular filter-feeding animals that represent a complex consortium of many species of eukaryotes and prokaryotes. In recent years, mass disease and death of has been a significant problem in Lake Baikal.

View Article and Find Full Text PDF
Article Synopsis
  • Green algae from the phylum are the most common autotrophic picoplankton in Lake Baikal, Russia.
  • In order to enhance understanding of these microalgae at the molecular level, researchers present the draft genome sequence of a specific strain.
  • This work aims to facilitate future comparisons with an endosymbiotic strain.
View Article and Find Full Text PDF

There are significant changes in the consortium of microorganisms of freshwater Baikal sponges during their mass death, which began in 2011. The alleged cause of disease is a significant increase in the number of opportunistic microorganisms. Here, we report the draft genome sequence of sp.

View Article and Find Full Text PDF
Article Synopsis
  • - The genome sequence of a bacteria strain known as SLB01, which produces violacein and can survive in cold conditions, was successfully drafted.
  • - This strain was isolated from a diseased sponge, highlighting its unique environment and characteristics.
  • - Researchers found five specific genes (VioA, VioB, VioC, VioD, and VioE) in SLB01 that are involved in the production of violacein, similar to genes found in other studied strains (MTR and RIT308).
View Article and Find Full Text PDF