Taxonomic Diversity of Actinomycetes Isolated from Swine Manure Compost

Hayakawa, Masayuki; Yamamura, Hideki; Nakagawa, Youji; Kawa, Yoshika; Hayashi, Yukikazu; Misonou, Taku; Kaneko, Hidehiro; Kikushima, Noriko; Takahashi, Takehiro; Yamasaki, Shuhei; Uegaki, Yoshinobu; Terasawa, Akihiro; Takao, Kiyotoshi; Mori, Tomokazu; Ago, Ken-ichi; Saito, Nobuhiro; Hasegawa, Tatsuya

doi:10.3209/saj.saj240202

Cited by 9 publications

(5 citation statements)

References 17 publications

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“…However, the 80°C heat impact on these two phyla appears not to be compensated for by growth. This is in agreement with the low growth rates observed for species from these two phyla (Hayakawa et al 2010;George et al 2011).…”

Section: Bacterial Families Responding To Heat Disturbancesupporting

confidence: 91%

“…This is in agreement with the low growth rates observed for species from these two phyla (Hayakawa et al . ; George et al . ).…”

Section: Discussionmentioning

confidence: 99%

“…3c). Actinobacteria and Acidobacteria phyla are known to withstand heat, as heat treatments are used for their selective isolation (Hayakawa et al 2010;Guo & Zhang 2014). However, the 80°C heat impact on these two phyla appears not to be compensated for by growth.…”

Section: Bacterial Families Responding To Heat Disturbancementioning

confidence: 99%

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Impact of soil heat on reassembly of bacterial communities in the rhizosphere microbiome and plant disease suppression

et al. 2016

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The rhizosphere microbiome offers a range of ecosystem services to the plant, including nutrient acquisition and tolerance to (a)biotic stress. Here, analysing the data by Mendes et al. (2011), we show that short heat disturbances (50 or 80 °C, 1 h) of a soil suppressive to the root pathogenic fungus Rhizoctonia solani caused significant increase in alpha diversity of the rhizobacterial community and led to partial or complete loss of disease protection. A reassembly model is proposed where bacterial families that are heat tolerant and have high growth rates significantly increase in relative abundance after heat disturbance, while temperature-sensitive and slow-growing bacteria have a disadvantage. The results also pointed to a potential role of slow-growing, heat-tolerant bacterial families from Actinobacteria and Acidobacteria phyla in plant disease protection. In conclusion, short heat disturbance of soil results in rearrangement of rhizobacterial communities and this is correlated with changes in the ecosystem service disease suppression.

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Section: Bacterial Families Responding To Heat Disturbancesupporting

confidence: 91%

“…This is in agreement with the low growth rates observed for species from these two phyla (Hayakawa et al . ; George et al . ).…”

Section: Discussionmentioning

confidence: 99%

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Impact of soil heat on reassembly of bacterial communities in the rhizosphere microbiome and plant disease suppression

et al. 2016

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“…Thermoactinomyces sp. which is a common compost actinomycete was not observed in our sample and a similar situation was also reported by Hayakawa et al (2010). Furthermore, both studies were consistent in reporting the presence of Glycomyces sp.…”

Section: Resultssupporting

confidence: 92%

Taxonomic Diversity and Antimicrobial Activities of Actinomycetes from Manure Composts

Low

Mohamad

Abdullah

2015

Research J. of Microbiology

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Manure compost is a unique microenvironment which harbours potential new microorganisms that is able to produce a variety of anti-infective agents. However, the exploration of this ecosystem for actinomycetes and its bioactive secondary metabolites remained understudied. Therefore, this study aims to study the diversity of manure compost actinomycetes and to investigate their antimicrobial potential using conventional disc diffusion method and a modified resazurin microtiter based approach. A collection of 191 actinomycete isolates were recovered from 5 types of manure composts collected around Selangor, Malaysia. Utilizing a combination of micromorphological characteristics and 16S rRNA sequence analysis, the isolated actinomycetes were grouped into 12 genera within 9 families. Streptomyces spp. dominated the culture collection (79.1%) while the rest belonged to the non-Streptomyces group (20.9%), including an unusual isolate from the genus Verrucosispora. The evaluation of antimicrobial activities demonstrated that 21.5% of the isolates exhibited antagonistic effect against at least one of the test microorganisms with strong inhibition observed against fungal strains compared to pathogenic bacteria. A modified resazurin microtiter based assay was also developed and displayed higher sensitivity (40.0%) compared to the disc diffusion assay (26.0%). All ten actinomycete isolates which displayed narrow and broad spectrum effects also produce pigmented extracts. The results demonstrated that manure compost actinomycetes could be a promising source of novel bioactive agents and that the resazurin microtiter based assay is a more sensitive approach in screening antimicrobial properties of large numbers of microbial extracts.

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“…Furthermore, S. griseus and Thermomonospora viridis (Saccharomonospora viridis) decrease odorous gas emission from swine manure [109].…”

Section: Other Activitiesmentioning

confidence: 99%

Biologically active secondary metabolites from Actinomycetes

Solecka¹,

Zajko²,

Postek³

et al. 2012

Open Life Sciences

110

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AbstractSecondary metabolites obtained from Actinomycetales provide a potential source of many novel compounds with antibacterial, antitumour, antifungal, antiviral, antiparasitic and other properties. The majority of these compounds are widely used as medicines for combating multidrug-resistant Gram-positive and Gram-negative bacterial strains. Members of the genus Streptomyces are profile producers of previously-known secondary metabolites. Actinomycetes have been isolated from terrestrial soils, from the rhizospheres of plant roots, and recently from marine sediments. This review demonstrates the diversity of secondary metabolites produced by actinomycete strains with respect to their chemical structure, biological activity and origin. On the basis of this diversity, this review concludes that the discovery of new bioactive compounds will continue to pose a great challenge for scientists.

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Taxonomic Diversity of Actinomycetes Isolated from Swine Manure Compost

Cited by 9 publications

References 17 publications

Impact of soil heat on reassembly of bacterial communities in the rhizosphere microbiome and plant disease suppression

Impact of soil heat on reassembly of bacterial communities in the rhizosphere microbiome and plant disease suppression

Taxonomic Diversity and Antimicrobial Activities of Actinomycetes from Manure Composts

Biologically active secondary metabolites from Actinomycetes

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