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Attachment of Bacillus subtilis to the hyphae of Aspergillus niger results in altered metabolism and defense mechanisms in both partner

ABSTRACT: Transcriptome comparison of Bacillus subtilis NCIB3610 attached to the hyphae of Aspergillus niger CB 119.1 compared to Bacillus subtilis NCIB3610 cells in the supernatant of the same culture. Detailed description (other than provided below) of growth conditions, RNA preparation, cDNA synthesis and hybridization conditions can also be found in the submitted paper.

ORGANISM(S): Bacillus subtilis Bacillus subtilis subsp. subtilis str. 168 Aspergillus niger

PROVIDER: GSE46682 | GEO | 2014/09/09

SECONDARY ACCESSION(S): PRJNA201494

REPOSITORIES: GEO

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Attachment of Bacillus subtilis to the hyphae of Aspergillus niger results in altered metabolism and defense mechanisms in both partner

Project description:Transcriptome comparison of Bacillus subtilis NCIB3610 attached to the hyphae of Aspergillus niger CB 119.1 compared to Bacillus subtilis NCIB3610 cells in the supernatant of the same culture. Detailed description (other than provided below) of growth conditions, RNA preparation, cDNA synthesis and hybridization conditions can also be found in the submitted paper. B subtilis NCIB3610 cells were grown in the presence of Aspergillus niger CB 119.1 hyphae for 3 hours. The mycelium and the attached bacteria were separated from the non-attached B. subtilis cells via filtration through Miracloth. The mycelia and attached bacteria were briefly rinsed with TY medium, dried, and the sample was frozen in liquid nitrogen. Bacterial cells in the flow-through medium fraction were harvested by centrifugation at 10.397 g for 1 min. To extract RNA mainly from the bacterial cells, lysozyme solution and RiboLock (Thermo Scientific) was added followed by incubation at 37 C for 30 minutes. Further RNA extraction was performed with the Macaloid/Roche method as described before (van Hijum et al., 2005, KovÃ¡cs and Kuipers, 2011) but omitting the bead beater treatment and using RiboLock.

2014-09-09 | E-GEOD-46682 | biostudies-arrayexpress

Attachment of Bacillus subtilis to the hyphae of Aspergillus niger results in altered metabolism and defense mechanisms in both partner

Project description:Interaction of microbes affects the growth, metabolism and differentiation of members of the community. While direct and indirect competitions, like spite and nutrient consumption have negative effect on each other, microbes also evolved in nature not only to fight, but in some cases to adapt or support each other while increasing the fitness of the community. Presence of bacteria and fungi in the soil results in interactions and various examples were described, including mutualism. Bacilli attach to the plant root and form complex communities in the rhizosphere. Bacillus subtilis, when grown in the presence of Aspergillus niger interacts with the fungal partner, attaches and grows on the hyphae. Using dual transcriptome experiment, we show that both fungi and bacteria alter their metabolisms during the interaction. Interestingly, the transcription of genes related to the antifungal and antibacterial defense mechanism of B. subtilis and A. niger, respectively, are decreased upon attachment of bacteria to the mycelia. Our microarray experiments provide a novel insight into the mutual interaction of a bacterium and a fungus. Aspergillus niger were grown with and without Bacillus subtilis. Biological triplicates were made for both conditions, Affymetrix microarray experiments were performed on these samples.

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Attachment of Bacillus subtilis to the hyphae of Aspergillus niger results in altered metabolism and defense mechanisms in both partner

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