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Nostoc punctiforme NIES-2108 isolate:NIES-2108

ABSTRACT: Nostoc punctiforme NIES-2108 from xenic culture. Genome and Assembly

PROVIDER: PRJNA319602 | ENA |

REPOSITORIES: ENA

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Comparative transcriptomics of wild-type (Nostoc punctiforme ATCC 29133) and hmpD-deletion strains (UCD 543) of Nostoc punctiforme ATCC 29133

Project description:Change in gene expression for a wild-type (Nostoc punctiforme ATCC 29133) and hmpD-deletion strain (UCD 543) of Nostoc punctiforme ATCC 29133 over the time course of hormogonium development This study is further descirbed in Risser, D.D. and Meeks, J.C. 2013. Comparative transcriptomics with a motility deficient mutant leads to identification of a novel polysaccharide secretion system in Nostoc punctiforme. Molecular Microbiology

2013-01-01 | GSE42859 | GEO

Comparative transcriptomics of wild-type (Nostoc punctiforme ATCC 29133) and hmpD-deletion strains (UCD 543) of Nostoc punctiforme ATCC 29133

2013-01-01 | E-GEOD-42859 | biostudies-arrayexpress

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Project description:Change in gene expression for wild-type Nostoc punctiforme ATCC 29133 over the time course of hormogonium development

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Early events of the symbiotic interaction between Oryza sativa and Nostoc punctiforme revealed by a quantitative proteomic approach.

Project description:Plant-cyanobacteria symbiosis is considered one of the pivotal events in the history of life. In this symbiosis, the cyanobacterium provides to the plant fixed nitrogen compounds and plant hormones and, in return, the plant provides to the cyanobacterium fixed carbon. Despite the large knowledge in the physiology and ecology of plant-cyanobacteria symbioses, little is known about the molecular mechanisms involved in the crosstalk between partners. It has been shown recently that Nostoc punctiforme is able to stablish an endophytic symbiosis with Oryza sativa. This finding opens a door to explore this symbiotic interaction as a sustainable alternative to nitrogen fertilization of paddy fields. However, molecular mechanisms behind Oryza-Nostoc endosymbiosis are still not clarified. To gain further insights, an LC-MS/MS based label-free quantitative technique was used to evaluate the differential proteomics under N. punctiforme treatment vs. control plants at 1 day and 7 days. Differential expression profiling reveals a significant number of proteins to be down-regulated or missing in both partners, while others were more abundant or only expressed when both partners were in contact. In N. punctiforme, the differential protein expression was primarily connected to primary metabolism, signal transduction and perception, transport of substances and photosynthesis. In O. sativa, the differential protein expression was connected to a wide range of biological functions regulating carbon and nitrogen metabolism and response to biotic and abiotic stresses.

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The cyanobacterium, Nostoc punctiforme can protect against programmed cell death and induce defence genes in Arabidopsis thaliana.

Project description:Many cyanobacteria can form nitrogen-fixing symbioses with a broad range of plant species. Unlike other plant-bacteria symbioses, little is understood about the immunological responses induced by plant cyanobionts (symbiotic cyanobacteria). Here, we used Arabidopsis thaliana suspension cell cultures as a model system to demonstrate that the model plant-symbiotic cyanobacteria, Nostoc punctiforme is capable of protecting against plant programmed cell death (PCD). We also profiled the early transcriptomic changes that were induced in response to conditioned medium (CM) from N. punctiforme cell cultures. Interestingly, the PCD reduction was preceded by the induction of genes associated with defence and immunity, the most striking of which were a number of WRKY-family transcription factors. Down-regulated included genes involved in the regulation of cell growth and differentiation. This work is the first to show that a cyanobacteria can regulate plant PCD and provides a useful transcriptome resource for studying early plant cell responses to symbiotic cyanobacteria.

2020-12-10 | GSE155980 | GEO

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