Filamentous actinobacteria of the saline soils of arid territories

Lubsanova, D. A.; Zenova, G. M.; Kozhevin, P. A.; Manucharova, N. A.; Shvarov, A. P.

doi:10.3103/s0147687414020057

Cited by 19 publications

(11 citation statements)

References 3 publications

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“…Members of Actinobacteria exist in a complete spectrum of extreme ecosystems. The existence of acidtolerant, alkaliphilic, psychrotolerant, thermotolerant, halotolerant, alkalitolerant, haloalkalitolerant, and xerophilous Actinobacteria has been reported ( Lubsanova et al, 2014 ). Acidobacteria was demonstrated to be a main component of the foxtail millet root microbiota by 16S rRNA gene amplicon sequencing ( Jin et al, 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Drought-Tolerant Plant Growth-Promoting Rhizobacteria Associated with Foxtail Millet in a Semi-arid Agroecosystem and Their Potential in Alleviating Drought Stress

et al. 2018

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The application of plant growth promoting rhizobacteria (PGPR) to agro-ecosystems is considered to have the potential for improving plant growth in extreme environments featured by water shortage. Herein, we isolated bacterial strains from foxtail millet (Setaria italica L.), a drought-tolerant crop cultivated in semiarid regions in the northeast of China. Four isolates were initially selected for their ability to produce ACC deaminase as well as drought tolerance. The isolates were identified as Pseudomonas fluorescens, Enterobacter hormaechei, and Pseudomonas migulae on the basis of 16S rRNA sequence analysis. All of these drought-tolerant isolates were able to produce EPS (exopolysaccharide). Inoculation with these strains stimulated seed germination and seedling growth under drought stress. Pseudomonas fluorescens DR7 showed the highest level of ACC deaminase and EPS-producing activity. DR7 could efficiently colonize the root adhering soil, increased soil moisture, and enhance the root adhering soil/root tissue ratio. These results suggest drought tolerant PGPR from foxtail millet could enhance plant growth under drought stress conditions and serve as effective bioinoculants to sustain agricultural production in arid regions.

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Section: Discussionmentioning

confidence: 99%

Drought-Tolerant Plant Growth-Promoting Rhizobacteria Associated with Foxtail Millet in a Semi-arid Agroecosystem and Their Potential in Alleviating Drought Stress

et al. 2018

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“…Mycetocola manganoxydans, a unique nonsporulating alkaliphilic actinobacterium isolated from the Taklamakan Desert can oxidize manganese ions (Luo et al ). In addition, several alkalihalophilic actinobacteria have been isolated from the Qinghai‐Tibet Plateau, including members of the genera Cellulomonas, Saccharothrix and Streptosporangium (Ding et al ) whereas Actinomadura and Nocardiopsis strains have been recovered from alkaline arid soils adjacent to salty lakes in Buryatiya (Lubsanova et al ). A novel alkaliphilic Streptomyces strain isolated from an alkaline soil in the arid area of Boho, Northern Ireland was found to grow under intense γ‐radiation (4 kGy) at pH 10·5, and shown to be a potential source of novel specialized metabolites that inhibit ESKAPE pathogens (Terra et al ).…”

Section: Desertsmentioning

confidence: 99%

Extreme environments: microbiology leading to specialized metabolites

et al. 2019

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Summary The prevalence of multidrug‐resistant microbial pathogens due to the continued misuse and overuse of antibiotics in agriculture and medicine is raising the prospect of a return to the preantibiotic days of medicine at the time of diminishing numbers of drug leads. The good news is that an increased understanding of the nature and extent of microbial diversity in natural habitats coupled with the application of new technologies in microbiology and chemistry is opening up new strategies in the search for new specialized products with therapeutic properties. This review explores the premise that harsh environmental conditions in extreme biomes, notably in deserts, permafrost soils and deep‐sea sediments select for micro‐organisms, especially actinobacteria, cyanobacteria and fungi, with the potential to synthesize new druggable molecules. There is evidence over the past decade that micro‐organisms adapted to life in extreme habitats are a rich source of new specialized metabolites. Extreme habitats by their very nature tend to be fragile hence there is a need to conserve those known to be hot‐spots of novel gifted micro‐organisms needed to drive drug discovery campaigns and innovative biotechnology. This review also provides an overview of microbial‐derived molecules and their biological activities focusing on the period from 2010 until 2018, over this time 186 novel structures were isolated from 129 representatives of microbial taxa recovered from extreme habitats.

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“…Members of Actinobacteria are recovered from a complete spectrum of extreme ecosystems. The existence of acidtolerant, alkaliphilic, psychrotolerant, thermotolerant, halotolerant, alkalitolerant, haloalkalitolerant, and xerophilous Actinobacteria has been reported (Lubsanova et al, 2014 ). Novel chemodiversity is more probable to be found in rare or recently cultivated strains.…”

Section: New Source For Extremophilic Actinobacteriamentioning

confidence: 99%

“…315 from Mongolian desert soil (Kurapova et al, 2012 ). In addition to Streptomyces , strains belonging to Micromonospora, Saccharothrix, Streptosporangium , and Cellulomonas were obtained from the Qinghai-Tibet Plateau (Ding et al, 2013a ), while Micromonospora, Actinomadura , and Nocardiopsis were reported from soda saline soils of the ephemeral salty lakes in Buryatiya (Lubsanova et al, 2014 ).…”

Section: Xerophilic Strains Isolated From Arid Areasmentioning

confidence: 99%

“…It was found that all the halotolerant strains (which were capable of growth at 5% NaCl), unlike unhalophilic strains, were able to grow on a medium that contained soda at pH 10, while non-halophilic strains do not possess such an ability. In this respect, a moderate thermophilic strain of Streptomyces fumigatiscleroticus 315 HE578745 that was isolated from the desert soil was experimentally shown to be xerotolerant (Lubsanova et al, 2014 ). The halotolerant alkaliphilic Streptomyces aburaviensis was isolated from the saline desert of Kutch in India that selectively inhibits the growth of Gram positive bacteria.…”

Section: Xerophilic Strains Isolated From Arid Areasmentioning

confidence: 99%

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Actinobacteria from Arid and Desert Habitats: Diversity and Biological Activity

2016

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The lack of new antibiotics in the pharmaceutical pipeline guides more and more researchers to leave the classical isolation procedures and to look in special niches and ecosystems. Bioprospecting of extremophilic Actinobacteria through mining untapped strains and avoiding resiolation of known biomolecules is among the most promising strategies for this purpose. With this approach, members of acidtolerant, alkalitolerant, psychrotolerant, thermotolerant, halotolerant and xerotolerant Actinobacteria have been obtained from respective habitats. Among these, little survey exists on the diversity of Actinobacteria in arid areas, which are often adapted to relatively high temperatures, salt concentrations, and radiation. Therefore, arid and desert habitats are special ecosystems which can be recruited for the isolation of uncommon Actinobacteria with new metabolic capability. At the time of this writing, members of Streptomyces, Micromonospora, Saccharothrix, Streptosporangium, Cellulomonas, Amycolatopsis, Geodermatophilus, Lechevalieria, Nocardia, and Actinomadura are reported from arid habitats. However, metagenomic data present dominant members of the communities in desiccating condition of areas with limited water availability that are not yet isolated. Furthermore, significant diverse types of polyketide synthase (PKS) and non-ribosomal peptide synthetase (NRPS) genes are detected in xerophilic and xerotolerant Actinobacteria and some bioactive compounds are reported from them. Rather than pharmaceutically active metabolites, molecules with protection activity against drying such as Ectoin and Hydroxyectoin with potential application in industry and agriculture have also been identified from xerophilic Actinobacteria. In addition, numerous biologically active small molecules are expected to be discovered from arid adapted Actinobacteria in the future. In the current survey, the diversity and biotechnological potential of Actinobacteria obtained from arid ecosystems, along with the recent work trend on Iranian arid soils, are reported.

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Filamentous actinobacteria of the saline soils of arid territories

Cited by 19 publications

References 3 publications

Drought-Tolerant Plant Growth-Promoting Rhizobacteria Associated with Foxtail Millet in a Semi-arid Agroecosystem and Their Potential in Alleviating Drought Stress

Drought-Tolerant Plant Growth-Promoting Rhizobacteria Associated with Foxtail Millet in a Semi-arid Agroecosystem and Their Potential in Alleviating Drought Stress

Extreme environments: microbiology leading to specialized metabolites

Actinobacteria from Arid and Desert Habitats: Diversity and Biological Activity

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