Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1248820 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| Other | ||||
| SRR33064614_1.fastq.gz | Fastqsanger.gz | |||
| SRR33064614_2.fastq.gz | Fastqsanger.gz | |||
| SRR33064616_1.fastq.gz | Fastqsanger.gz | |||
| SRR33064616_2.fastq.gz | Fastqsanger.gz |
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Project description:Anthropogenic nitrogen (N) deposition may affect soil organic carbon (SOC) decomposition, thus affecting the global terrestrial carbon (C) cycle. However, it remains unclear how the level of N deposition affects SOC decomposition by regulating microbial community composition and function, especially C-cycling functional genes structure. We investigated the effects of short-term N addition on soil microbial C-cycling functional gene composition, SOC-degrading enzyme activities, and CO2 emission in a 5-year field experiment established in an artificial Pinus tabulaeformis forest on the Loess Plateau, China.
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Project description:We have examined and compared the transcriptome of T. reesei growing on wheat straw and lactose as carbon sources under otherwise similar conditions. Gene expression on wheat straw exceeded that on lactose, and 1619 genes were found to be only induced on wheat straw but not on lactose. They comprised 30 % of the CAZome, but were also enriched in genes associated with phospholipid metabolism, DNA synthesis and repair and iron homeostatis. Two thirds of the CAZome was expressed both on wheat straw as well as on lactose, but 60 % of it at least >2-fold higher on the former. Major wheat straw specific genes comprised xylanases, chitinases and ß-mannosidases. Interestingly, the latter two CAZyme families were significantly higher expressed in a strain in which xyr1 encoding the major regulator of cellulase and hemicellulase biosynthesis is non-functional, demonstrating that XYR1 is a repressor of these genes.
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Project description:Soil microorganisms carry out decomposition of complex organic carbon molecules, such as chitin. High diversity of the soil microbiome and complexity of the soil habitat has posed a challenge to elucidate specific interactions between soil microorganisms. Here, we overcame this challenge by studying a model soil consortium (MSC-2) that is composed of 8 species. The MSC-2 isolates were originally obtained from the same soil that was enriched with chitin as a substrate. Our aim was to elucidate specific roles of the 8 member species during chitin metabolism in soil. The 8 species were added to sterile soil with chitin and incubated for 3 months. Multi-omics was used to understand how the community composition, transcript and protein expression and chitin-related metabolites shifted during the incubation period. The data clearly and consistently revealed a temporal shift during chitin decomposition and defined contributions by individual species. A Streptomyces species was a key player in early steps of chitin decomposition, followed by other members of MSC-2. These results illustrate how multi-omics applied to a defined consortium untangles complex interactions between soil microorganisms.
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Project description:We have examined and compared the transcriptome of T. reesei growing on wheat straw and lactose as carbon sources under otherwise similar conditions. Gene expression on wheat straw exceeded that on lactose, and 1619 genes were found to be only induced on wheat straw but not on lactose. They comprised 30 % of the CAZome, but were also enriched in genes associated with phospholipid metabolism, DNA synthesis and repair and iron homeostatis. Two thirds of the CAZome was expressed both on wheat straw as well as on lactose, but 60 % of it at least >2-fold higher on the former. Major wheat straw specific genes comprised xylanases, chitinases and M-CM-^_-mannosidases. Interestingly, the latter two CAZyme families were significantly higher expressed in a strain in which xyr1 encoding the major regulator of cellulase and hemicellulase biosynthesis is non-functional, demonstrating that XYR1 is a repressor of these genes. We used two biological replicas of four T. reesei strains growing on glucose, lactose, and on wheat straw
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Project description:Phytophthora blight is a highly destructive soil borne disease caused by Phytophthora capsici Leonian, which seriously threatens global pepper production. Grafting is one of the important means to improve plant disease resistance and prevent soil borne diseases in vegetable production. However, the molecular mechanism by which grafting enhances the resistance of pepper to Phytophthora blight is still unclear. This study used Phytophthora capsici resistant strain ‘ZCM334’ and susceptible strain ‘Early Calwonder’ as rootstocks, and ‘Early Calwonder’ as scions for grafting. Phenotypic observation and cytological analysis showed that compared with the ‘Early Calwonder’ self rooted plants, the ‘ZCM334’ grafted plants had a later onset of disease, stronger resistance, and less damage to leaf cells, indicating that grafting can significantly improve the resistance of pepper to Phytophthora capsici. This study identified differentially expressed proteins (DEPs) in the leaves and roots of ‘ZCM334’ grafted plants and ‘Early Calwonder’ self rooted plants through proteomic analysis based on iTRAQ technology, and 478 and 349 DEPs were identified between their leaves and roots, respectively. These DEPs were mainly involved in metabolic process, cellular process, response to stimulus and catalytic activity processes. We identified and screened 12 DEPs with consistent expression trends in the leaves and roots of ‘ZCM334’ grafted plants and ‘Early Calwonder’ self rooted plants, including seven DEPs related to Phytophthora capsici resistance (CA01g31060, CA02g15780, CA02g30850, CA01g11410, CA05g12260, CA03g35150, and CA03g36980) and five proteins with unknown functions (CA01g26190, CA11g10620, CA12g02730, CA01g20890 and CA02g11340). Through qRT-PCR analysis, a significant correlation was observed between the protein and transcript levels of these 12 DEPs, and their expression characteristics were analyzed in the roots and leaves of ‘ZCM334’ grafted plants and ‘Early Calwonder’ self rooted plants at different stages (0h, 12h, 24h, and 36h) after inoculation with Phytophthora capsici. This study provides valuable information for exploring the molecular mechanisms by which grafting enhances the resistance of pepper to Phytophthora blight and the excavation of these key genes provides research ideas for studying the regulatory network of pepper resistance to Phytophthora capsici.
2024-05-24 | PXD045628 | Pride