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ABSTRACT: rice root microbiome

PROVIDER: PRJNA546074 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9192120_1.fastq.gz	Fastqsanger.gz
	SRR9192120_2.fastq.gz	Fastqsanger.gz
	SRR9192130_1.fastq.gz	Fastqsanger.gz
	SRR9192130_2.fastq.gz	Fastqsanger.gz
	SRR9192140_1.fastq.gz	Fastqsanger.gz

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Project description:Rice root microbiome

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Niche differentiation of arsenic-transforming microbial groups in rice rhizosphere compartments as impacted by water management and soil-As concentrations

Project description:Arsenic (As) bioavailability in the rice rhizosphere is influenced by many microbial interactions, particularly by metal-transforming functional groups at the root-soil interface. This study was conducted to examine As-transforming microbes and As-speciation in the rice rhizosphere compartments, in response to two different water management practices (continuous and intermittently flooded), established on fields with high to low soil-As concentration. Microbial functional gene composition in the rhizosphere and root-plaque compartments were characterized using the GeoChip 4.0 microarray. Arsenic speciation and concentrations were analyzed in the rhizosphere soil, root-plaque, porewater and grain samples. Results indicated that intermittent flooding significantly altered As-speciation in the rhizosphere, and reduced methyl-As and AsIII concentrations in the pore water, root-plaque and rice grain. Ordination and taxonomic analysis of detected gene-probes indicated that root-plaque and rhizosphere assembled significantly different metal-transforming functional groups. Taxonomic non-redundancy was evident, suggesting that As-reduction, -oxidation and -methylation processes were performed by different microbial groups. As-transformation was coupled to different biogeochemical cycling processes establishing functional non-redundancy of rice-rhizosphere microbiome in response to both rhizosphere compartmentalization and experimental treatments. This study confirmed diverse As-biotransformation at root-soil interface and provided novel insights on their responses to water management, which can be applied for mitigating As-bioavailability and accumulation in rice grains.

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MERISTEM ACTIVITYLESS1 (MAL1) is involved in crown root development through the maintenance of meristem size in rice

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