Rhizosphere metagenome
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ABSTRACT:
PROVIDER: PRJNA309754 | ENA |
REPOSITORIES: ENA
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Project description:Background: The soil environment is responsible for sustaining most terrestrial plant life on earth, yet we know surprisingly little about the important functions carried out by diverse microbial communities in soil. Soil microbes that inhabit the channels of decaying root systems, the detritusphere, are likely to be essential for plant growth and health, as these channels are the preferred locations of new root growth. Understanding the microbial metagenome of the detritusphere and how it responds to agricultural management such as crop rotations and soil tillage will be vital for improving global food production. Methods: The rhizosphere soils of wheat and chickpea growing under + and - decaying root were collected for metagenomics sequencing. A gene catalogue was established by de novo assembling metagenomic sequencing. Genes abundance was compared between bulk soil and rhizosphere soils under different treatments. Conclusions: The study describes the diversity and functional capacity of a high-quality soil microbial metagenome. The results demonstrate the contribution of the microbiome from decaying root in determining the metagenome of developing root systems, which is fundamental to plant growth, since roots preferentially inhabit previous root channels. Modifications in root microbial function through soil management, can ultimately govern plant health, productivity and food security.
2020-03-06 | GSE146427 | GEO
Project description:The rhizosphere microbiome plays an essential role in enhancing the growth of plants, raising the need for comprehension of their metabolic abilities. Here, we investigated rhizospheric and bulk soils of maize plants in Mafikeng, South Africa. Metagenome-assembled genomes containing plant growth-promoting genes were reconstructed.
| S-EPMC7909085 | biostudies-literature
Project description:Wheat is the major crop in India and like other crops also subjected to influence by microbial communities of the rhizospheric region which are extremely diverse and undoubtedly play a central role in the nutrient cycle, plant productivity and growth promotion. In order to know how changes in the rhizospheric microbial community can make an impact on overall crop function, wheat rhizospheric soil samples from Ghazipur (25.913824 N 83.529715 E) regions of Eastern Uttar Pradesh (Eastern Indogangatic Plain), were collected and analyzed. Full length 16S rRNA gene amplification sequencing was performed to reveal the bacterial community in wheat rhizosphere. A total of 51,909 read were analyzed, out of that only 44,125 reads were classified and 7784 were unclassified using oxford nanopore sequencing and EPI2ME data analysis platform. MinION oxford nanopore sequencing uncovered that dominant phyla were Proteobacteria (68%), followed by firmicutes (13%), bacteroidetes (3%), actinobacteria (3%) and acidobacteria (3%). The data is available at the NCBI - Sequence Read Archive (SRA) with accession number: SRX5275271.
| S-EPMC6956763 | biostudies-literature
Project description:Mineral phosphate solubilization (MPS) microorganisms are important for their provision of orthophosphate anions for plant growth promotion activity in soil. In this study, we applied a functional metagenomic approach to identify this trait directly from the microbiome in barley rhizosphere soil that had not received P fertilizer over a 15-year period. A fosmid system was used to clone the metagenome of which 18,000 clones (~666 Mb of DNA) was screened for MPS. Functional assays and High Performance Liquid Chromatography analysis recognized gluconic acid production and MPS activity in the range 24.8-77.1 mmol/L and 27.6-38.16 μg/mL, respectively, when screened in an Escherichia coli host (at frequency of one MPS-positive clone hit per 114 Mb DNA tested). The MPS clones (with average insert size of ~37 kb) were analysed by 454 Roche sequencing and annotated. A number of genes/operons with homology to Phosphorous (P) uptake, regulatory and solubilization mechanisms were identified, linking the MPS function to the uncultivated microbiome present in barley rhizosphere soil.
| S-EPMC3831634 | biostudies-literature
Project description:Metal resistance determinants have traditionally been found in cultivated bacteria. To search for genes involved in nickel resistance, we analyzed the bacterial community of the rhizosphere of Erica andevalensis, an endemic heather which grows at the banks of the Tinto River, a naturally metal-enriched and extremely acidic environment in southwestern Spain. 16S rRNA gene sequence analysis of rhizosphere DNA revealed the presence of members of five phylogenetic groups of Bacteria and the two main groups of Archaea mostly associated with sites impacted by acid mine drainage (AMD). The diversity observed and the presence of heavy metals in the rhizosphere led us to construct and screen five different metagenomic libraries hosted in Escherichia coli for searching novel nickel resistance determinants. A total of 13 positive clones were detected and analyzed. Insights about their possible mechanisms of resistance were obtained from cellular nickel content and sequence similarities. Two clones encoded putative ABC transporter components, and a novel mechanism of metal efflux is suggested. In addition, a nickel hyperaccumulation mechanism is proposed for a clone encoding a serine O-acetyltransferase. Five clones encoded proteins similar to well-characterized proteins but not previously reported to be related to nickel resistance, and the remaining six clones encoded hypothetical or conserved hypothetical proteins of uncertain functions. This is the first report documenting nickel resistance genes recovered from the metagenome of an AMD environment.
| S-EPMC2075024 | biostudies-literature