AI Networking Cookbook: Practical recipes for AI-assisted network automation and development
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Light is shed on the potential role of horizontal genetransfer in the evolution of symbiosis and the importance of obtaining genomes to resolve coral-associated lineages and their metabolic capabilities is highlighted.
The genusSynechococcuscomprises photosynthetic picocyanobacteria that, as autotrophic microorganisms, make a significant contribution to the production of organic matter and oxygen in marine and freshwater ecosystems. The wide distribution of representatives of the genusSynechococcusis due to their genetic diversity and ecological plasticity. Of particular interest is the study of these microorganisms in unique natural ecosystems, such as Lake Baikal – a freshwater oligotrophic deep-water lake with a high percentage of endemism among its inhabiting species. This work presents an analysis of two genomes ofSynechococcusrepresentatives recovered from metagenomic data of microbial communities from the water of Lake Baikal (MAGs):Synechococcussp. bin7 andSynechococcussp. bin8. A structural and functional characterization of the genomes is provided, and genes for antibiotic resistance and secondary metabolite synthesis are identified. Phylogenetic analysis, including 90 closely related freshwater and marine representatives of the genusSynechococcusalongside the studied MAGs, showed that the genomes belong to different, rather distant, phylogenetic clades.
This study provides genome- and spatially resolved views of dominant SCB in holothurians and offers evolutionary insights into host-interface diversification in the deep-sea holothurian body wall.
This study presents the first reported high-quality genomes of marine Ca.
Six Gloeotrichia echinulata genomes derived from planktonic harmful algal blooms (HABs) with similar colonial morphology have been sequenced from lakes in the west and northeast regions of USA, four of them to completion. The c. 7 Mbp genomes exhibit a high level of conservation, with 98-99% pairwise genome-wide average nucleotide identity and high levels of synteny, representing a single species cluster. We observed strong conservation of gene clusters responsible for the synthesis of the secondary metabolites and bioactive peptides that are characteristic of HAB-forming cyanobacteria. All six G. echinulata genomes lack genes for the synthesis of classic cyanotoxins, including microcystin, but possess genes responsible for the synthesis of the taste and odor compound geosmin. Interestingly, the geoA geosmin synthase gene in three genomes is homologous to other cyanobacterial geoA genes, while the other three geoA genes are related to actinomyces geoA. Phylogenomic analysis places the G. echinulata genomes within a clade of benthic Nostocales, reflecting an ecological niche featuring extensive growth on the sediment surface before colonies disperse into the epilimnion for planktonic growth. We identify genes conserved in all six genomes that could represent physiological adaptations supporting active growth on sediments and pelagic recruitment independent of wind-driven mixing: phycoerythrin light harvesting complexes for optimal photosynthesis at depth; gliding motility to access patchy nutrient distributions; and gas vesicles with relatively small GvpC proteins that predict resistance to higher hydrostatic pressure. The strong genomic similarity across geographically distant populations suggests that G. echinulata in the United States is a tightly related non-toxigenic species group with predictable properties relevant to public health and drinking water management.
An integrated omics study provides foundational insights into the endophytic potential and genomic distinctiveness of AwOcstreb1, isolated from halophytic rice, and opens new avenues for exploring A. welwitschiae for sustainable agriculture and fungal biology.
A novel heterocytous Cyanobacterium, Ariadnema polymorpha gen. et sp. nov., was observed in the northern Brazilian Atlantic Forest (BAF), a globally significant biodiversity hotspot that has microbiome diversity yet to be explored. Isolated from ancient sugarcane mill ruins within the BAF, the new genus (strain CCAPE130) exhibits a unique morphology, including inverted Y true branching, coupled with scytonematoid and tolypothricoid false branching within the same trichome, an unusual morphology among heterocytous cyanobacteria. A polyphasic taxonomic approach, integrating detailed morphological characterization, transmission electron microscopy (TEM) ultrastructure analysis, 16S rRNA gene sequencing, and 16S-23S ITS rRNA region sequencing, was employed. Phylogenetic analysis using maximum likelihood and Bayesian inference placed CCAPE130 as a sister clade to the Symphyonema and Mastigocladopsis genera, which were previously associated with Symphyonemataceae, a family originally diagnosed by true Y-branching but now merged into the false-branched family Scytonemataceae. Structural comparisons of the 16S-23S ITS rRNA region D1-D1' showed variations, and the Box B region exhibited structural similarities with related lineages despite nucleotide differences. This research represents a phylogenetic analysis of Scytonemataceae specimens with true and false branching from the Americas, validating A. polymorpha as a new genus and species. Our results significantly enhance our understanding of Scytonemataceae phylogeny and underscore the rich, often overlooked, cyanobacterial diversity present in tropical forest regions, such as the Brazilian Atlantic Forest.
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