Hymenobacter kanuolensis sp. nov., a novel radiation-resistant bacterium

Su, Shiyou; Chen, Ming; Chen, Teng; Jiang, Shijie; Zhang, Chen; Lin, Min; Zhang, Wei

doi:10.1099/ijs.0.051680-0

Cited by 28 publications

(12 citation statements)

References 24 publications

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“…; Su et al . ), although red pigmentation is more generally considered as protection against UV radiation, including in M. lychnidis‐dioicae (Will & Reppe ; Will et al . ).…”

Section: Discussionmentioning

confidence: 99%

“…However, red pigments have been described in M. lychnidis-dioicae (which was named Ustilago violacea at that time; . Some other red-pigmented organisms are radio resistant (Asker et al 2007;Yuan et al 2009;Copeland et al 2012;Su et al 2014), although red pigmentation is more generally considered as protection against UV radiation, including in M. lychnidis-dioicae . Possibly, red pigmentation that had been selected to confer UV resistance also implies radio resistance, a hypothesis that should be explored in future studies.…”

Section: Discussionmentioning

confidence: 99%

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Lower prevalence but similar fitness in a parasitic fungus at higher radiation levels near Chernobyl

et al. 2016

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Nuclear disasters at Chernobyl and Fukushima provide examples of effects of acute ionizing radiation on mutations that can affect the fitness and distribution of species. Here, we investigated the prevalence of Microbotryum lychnidis-dioicae, a pollinatortransmitted fungal pathogen of plants causing anther-smut disease in Chernobyl, its viability, fertility and karyotype variation, and the accumulation of nonsynonymous mutations in its genome. We collected diseased flowers of Silene latifolia from locations ranging by more than two orders of magnitude in background radiation, from 0.05 to 21.03 lGy/h. Disease prevalence decreased significantly with increasing radiation level, possibly due to lower pollinator abundance and altered pollinator behaviour. Viability and fertility, measured as the budding rate of haploid sporidia following meiosis from the diploid teliospores, did not vary with increasing radiation levels and neither did karyotype overall structure and level of chromosomal size heterozygosity. We sequenced the genomes of twelve samples from Chernobyl and of four samples collected from uncontaminated areas and analysed alignments of 6068 predicted genes, corresponding to 1.04 3 10 7 base pairs. We found no dose-dependent differences in substitution rates (neither dN, dS, nor dN/dS). Thus, we found no significant evidence of increased deleterious mutation rates at higher levels of background radiation in this plant pathogen. We even found lower levels of nonsynonymous substitution rates in contaminated areas compared to control regions, suggesting that purifying selection was stronger in contaminated than uncontaminated areas. We briefly discuss the possibilities for a mechanistic basis of radio resistance in this nonmelanized fungus.

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“…; Su et al . ), although red pigmentation is more generally considered as protection against UV radiation, including in M. lychnidis‐dioicae (Will & Reppe ; Will et al . ).…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Lower prevalence but similar fitness in a parasitic fungus at higher radiation levels near Chernobyl

et al. 2016

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“…The genus Hymenobacter was identified as significantly more abundant in July phyllospheric communities, with average relative abundances of 11.1% and 4.3% in park and road samples, respectively. Some members of this genus have been described as radiation tolerant (Kim et al, 2016;Lee et al, 2014;Su et al, 2014) and psychrophilic or psychrotolerant (Klassen and Foght, 2011;Mi et al, 2014). Due to these features, it can be hypothesized that these bacteria may undergo a selection process, throughout the growing season, by the harsh conditions of the phyllospheric environment.…”

Section: Phylogenetic Diversitymentioning

confidence: 99%

Diversity and hydrocarbon-degrading potential of epiphytic microbial communities on Platanus x acerifolia leaves in an urban area

Gandolfi

Canedoli

Imperato

et al. 2017

Environmental Pollution

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Plants and their associated bacteria have been suggested to play a role in air pollution mitigation, especially in urban areas. Particularly, epiphytic bacteria might be able to degrade atmospheric hydrocarbons. However, phyllospheric bacterial communities are highly variable depending on several factors, e.g. tree species, leaf age and physiology, environmental conditions. In this work, bacterial communities hosted by urban Platanus x acerifolia leaves were taxonomically characterized using high throughput sequencing of 16S rRNA gene, and their temporal and spatial variability was assessed by comparing samples collected from different locations in the city of Milan (Italy) and in different months. The diversity of alkane hydroxylase (alkB) phylotypes harboured by phyllospheric bacteria associated to urban Platanus trees was also evaluated. Results revealed that temporal changes, which are related to seasonality, acted as a stronger driver both on Platanus phyllospheric community structure and on alkB phylotype diversity than sampling location. Biodiversity of bacterial communities decreased along the growing season, leading to a strong dominance by the genus Stenotrophomonas. On the contrary, diversity of hydrocarbon-degrading populations increased over the months, although it resulted lower than that reported for other habitats. It was therefore hypothesized that atmospheric hydrocarbons might play a key role in the selection of phyllospheric populations in urban areas.

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“…The genus is well-known for its high DNA G+C contents (54–72 mol%) compared with other members of the family Cytophagaceae . Members of the genus Hymenobacter have been isolated from various environments, including deserts (Zhang et al , 2007, 2009), vegetated soils (Hoang et al , 2013; Jin et al , 2014; Kim et al , 2008; Su et al , 2014; Zhang et al , 2011), sandstones (Han et al , 2014; Hirsch et al , 1998) and wetland (Baik et al , 2006). At the time of writing, the genus comprised 37 species (http://www.bacterio.net/hymenobacter.html; Parte, 2014), including the recently described species ‘ Hymenobacter swuensis ’ (Lee et al , 2014), ‘ Hymenobacter humi ’ (Srinivasan et al , 2015), Hymenobacter latericoloratus and Hymenobacter luteus (Liu et al , 2015).…”

mentioning

confidence: 99%