Scrambled and not-so-tiny genomes of fungal endosymbionts

Kuo, Chih-Horng

doi:10.1073/pnas.1508360112

Cited by 14 publications

(11 citation statements)

References 20 publications

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“…Another case of HGT has been reported to occur between oomycetes and fungi, which was related with genes of virulence and infection of host plants ( Soanes and Richards 2014 ). Many examples of HGT between endosymbiotic prokaryotes and their hosts have been reported, including Mollicutes-related endobacteria , the bacterium which forms endosymbiosis with Glomeromycota and Mucoromycotina ( Kuo 2015 ; Naito et al. 2015 ; Torres-Cortes et al.…”

Section: Discussionmentioning

confidence: 99%

“…However, the interaction of G. pyriforme and N. punctiforme is a clear evidence of proximity of AMF with cyanobacteria. The gene exchange with its symbiotic partner was reported multiple times in Glomeromycota ( Kuo 2015 ; Naito et al. 2015 ; Torres-Cortes et al.…”

Section: Discussionmentioning

confidence: 99%

“…2015 ). Many examples of HGT between endosymbiotic prokaryotes and their hosts have been reported, including Mollicutes-related endobacteria , the bacterium which forms endosymbiosis with Glomeromycota and Mucoromycotina ( Kuo 2015 ; Naito et al. 2015 ; Torres-Cortes et al.…”

Section: Introductionmentioning

confidence: 99%

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Conserved Proteins of the RNA Interference System in the Arbuscular Mycorrhizal Fungus Rhizoglomus irregulare Provide New Insight into the Evolutionary History of Glomeromycota

Lee

Kong

Harrison

et al. 2018

Genome Biology and Evolution

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Horizontal gene transfer (HGT) is an important mechanism in the evolution of many living organisms particularly in Prokaryotes where genes are frequently dispersed between taxa. Although, HGT has been reported in Eukaryotes, its accumulative effect and its frequency has been questioned. Arbuscular mycorrhizal fungi (AMF) are an early diverged fungal lineage belonging to phylum Glomeromycota, whose phylogenetic position is still under debate. The history of AMF and land plant symbiosis dates back to at least 460 Ma. However, Glomeromycota are estimated to have emerged much earlier than land plants. In this study, we surveyed genomic and transcriptomic data of the model arbuscular mycorrhizal fungus Rhizoglomus irregulare (synonym Rhizophagus irregularis) and its relatives to search for evidence of HGT that occurred during AMF evolution. Surprisingly, we found a signature of putative HGT of class I ribonuclease III protein-coding genes that occurred from autotrophic cyanobacteria genomes to R. irregulare. At least one of two HGTs was conserved among AMF species with high levels of sequence similarity. Previously, an example of intimate symbiosis between AM fungus and cyanobacteria was reported in the literature. Ribonuclease III family enzymes are important in small RNA regulation in Fungi together with two additional core proteins (Argonaute/piwi and RdRP). The eukaryotic RNA interference system found in AMF was conserved and showed homology with high sequence similarity in Mucoromycotina, a group of fungi closely related to Glomeromycota. Prior to this analysis, class I ribonuclease III has not been identified in any eukaryotes. Our results indicate that a unique acquisition of class I ribonuclease III in AMF is due to a HGT event that occurred from cyanobacteria to Glomeromycota, at the latest before the divergence of the two Glomeromycota orders Diversisporales and Glomerales.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Conserved Proteins of the RNA Interference System in the Arbuscular Mycorrhizal Fungus Rhizoglomus irregulare Provide New Insight into the Evolutionary History of Glomeromycota

Lee

Kong

Harrison

et al. 2018

Genome Biology and Evolution

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“…Although we provide evidence for which bacterial taxa are most affected by our experimental treatments, amplicon sequencing often does not allow distinguishing bacterial strains with identical 16S sequences (33,48,49). Thus, we cannot exclude the effect of gut bacteria on behaviour to be driven by the interaction of multiple bacterial strains with different metabolic potential, and further research should implement methods that allow considering this.…”

Section: Discussionmentioning

confidence: 95%

The scent of symbiosis: gut bacteria affect social interactions in leafcutting ants

Teseo

Zweden

Pontieri³

et al. 2018

Preprint

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Animal gut microbiota affect host physiology and behaviour. In eusocial Hymenoptera, where colony-level integrity is preserved via a nestmate discrimination system based on cuticular hydrocarbon mixtures, microorganismal effects may influence social dynamics. Although nestmate recognition has undergone a thorough exploration during the last four decades, few studies have investigated the putative role of gut microbes. Here we integrate metagenomic, chemical and behavioural approaches to test whether gut microbes affect nestmate recognition in Acromyrmex echinatior leaf-cutting ants. Treating workers with a sterile diet or with antibiotics resulted in a substantial alteration of their gut microbial communities. In pairwise social interactions, untreated vs. antibiotic-treated nestmates behaved more aggressively than other nestmate and non-nestmate pairs, suggesting that the suppression of microbes indirectly alters chemical social cues and triggers aggressive behaviour. Chemical analyses on treated individuals revealed a decrease in the abundance of two metapleural gland antifungal compounds, and we confirmed the correspondence between aggression levels and chemical profile differences. Feeding microbiota-remodelled ants with conspecific faecal droplets partially restored the original bacterial communities. Furthermore, non-nestmates fed with faecal droplets from different colonies were unusually aggressive compared to pairs fed with faecal droplets from the same colony. This suggests that chemicals derived from microbial strains may shape nestmate recognition, opening novel questions about the role of microorganisms in the evolution of social behaviour.

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“…El AMPc formado en el miocardio produce cambios en la función y el metabolismo debido, al menos en parte, a la acti^ vación de las proteínas quinasas AMPc-dependientes (43)(44)(45)(46)(47)(48). Los valores obtenidos para los parámetros bioquímicos se muestran en la figura.…”

Section: -Proteínas Quinasas Ampc-dependientesunclassified

Inhibidores de las fosfodiesterasas y función miocárdica

Argel¹

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El presente trabajo se realizó para aportar información sobre el comportamiento contráctil del miocardio frente a los agentes inhibidores de las fosfodiesterasas de nucleótidos - cíclicos y su relación con dichos nucleótidos. Se decidió investigar la interacción entre los niveles - intracelulares de AMPc y GMPc y la actividad de la proteína - quinasa AMPc-dependiente luego de la administración de los in hibidores de las fosfodiesterasas en corazón de rata aislado y perfundido,debido a los resultados contradictorios previamente descriptos para dichos inhibidores en diferentes especies (41,84-85,104-105,118,145-147). Como así también para - tratar de esclarecer el rol del GMPc en la mecánica cardíaca ya que se ha sugerido que dicho nucleótido modula el efecto - inotrópico positivo del AMPc (71,130-131,143,148-154).

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Scrambled and not-so-tiny genomes of fungal endosymbionts

Cited by 14 publications

References 20 publications

Conserved Proteins of the RNA Interference System in the Arbuscular Mycorrhizal Fungus Rhizoglomus irregulare Provide New Insight into the Evolutionary History of Glomeromycota

Conserved Proteins of the RNA Interference System in the Arbuscular Mycorrhizal Fungus Rhizoglomus irregulare Provide New Insight into the Evolutionary History of Glomeromycota

The scent of symbiosis: gut bacteria affect social interactions in leafcutting ants

Inhibidores de las fosfodiesterasas y función miocárdica

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