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Grazing-induced expression of seaweed genes

ABSTRACT: The aim of this study was to elucidate which changes in gene expression are related to the induced anti-herbivory response in the brown seaweed Fucus vesiculosus. Microarray hybridizations were used to identify genes differentially expressed in response to grazing by the isopod Idotea baltica. This study shows that modifications in gene expression occur simultaneously to a reduced palatability and that defence induction entails reallocation of resources from primary to secondary metabolism with down-regulation of photosynthesis and degradation of storage compounds.

ORGANISM(S): Fucus vesiculosus

PROVIDER: GSE47975 | GEO | 2013/06/19

SECONDARY ACCESSION(S): PRJNA208858

REPOSITORIES: GEO

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Grazing-induced expression of seaweed genes

Project description:The aim of this study was to elucidate which changes in gene expression are related to the induced anti-herbivory response in the brown seaweed Fucus vesiculosus. Microarray hybridizations were used to identify genes differentially expressed in response to grazing by the isopod Idotea baltica. This study shows that modifications in gene expression occur simultaneously to a reduced palatability and that defence induction entails reallocation of resources from primary to secondary metabolism with down-regulation of photosynthesis and degradation of storage compounds. Total RNA of Fucus vesiculosus pieces that were or were not previously grazed by Idotea baltica for 15 and 18 days (3 biological replicates each) was hybridized against pooled RNA from 4 F. vesiculosus pieces that were collected before onset of grazing (day 0).

2013-06-19 | E-GEOD-47975 | biostudies-arrayexpress

Expression of seaweed genes induced by perwinkle grazing

2013-12-13 | GSE53262 | GEO

Expression of seaweed genes induced by perwinkle grazing

Project description:The aim of this study was to elucidate changes in gene expression related to the induced anti-herbivory response in the brown seaweed Fucus vesiculosus. Microarray hybridizations were used to identify genes differentially expressed in response to grazing by the periwinkle Littorina obtusata. This study shows that modifications in gene expression occur simultaneously to a reduced palatability and that defence induction entails reallocation of resources from primary to secondary metabolism with down-regulation of photosynthesis. Total RNA of Fucus vesiculosus pieces that were or were not previously grazed by Littorina obtusata for 3, 12, 15, 21, and 24 days (5 biological replicates each) was hybridized against pooled RNA from 5 F. vesiculosus pieces that were collected before onset of grazing (day 0).

2013-12-13 | E-GEOD-53262 | biostudies-arrayexpress

Transcriptome of alfalfa plants under animal grazing

Project description:By comparing transcriptomes of tolerant and intolerant plants of sickle alfalfa subject to intensive animal grazing, we identified pathways involved in nutrient-responsive signaling, light and wound response, cell wall formation, and energy metabolism. In these pathways, grazing suppressed 39 genes, but less severe in the tolerant plant, and activated 5 genes all carrying polymorphisms in their homologous transcripts between the tolerant and intolerant plants. These genes and pathways - responsive to grazing and differentially expressed between the tolerant and intolerant plants – underline a defense mechanism in alfalfa against grazing stresses.

2016-08-24 | GSE50430 | GEO

Transcriptome of alfalfa plants under animal grazing

Project description:By comparing transcriptomes of tolerant and intolerant plants of sickle alfalfa subject to intensive animal grazing, we identified pathways involved in nutrient-responsive signaling, light and wound response, cell wall formation, and energy metabolism. In these pathways, grazing suppressed 39 genes, but less severe in the tolerant plant, and activated 5 genes all carrying polymorphisms in their homologous transcripts between the tolerant and intolerant plants. These genes and pathways - responsive to grazing and differentially expressed between the tolerant and intolerant plants â?? underline a defense mechanism in alfalfa against grazing stresses. We examined transcriptomes of 3 alfalfa plants: grazing tolerant and grazed, grazing tolerant and not grazed, grazing intolerant and grazed, all at single replicate each.

2016-08-24 | E-GEOD-50430 | biostudies-arrayexpress

Fermented seaweed

Project description:Fermented seaweed Raw sequence reads

| PRJNA716165 | ENA

Changes in exosomal circulating microRNAs in grazing cattle

2016-01-01 | GSE69717 | GEO

Changes in exosomal circulating microRNAs in grazing cattle

Project description:To investigate the potential effect of grazing movement on miRNA circulation in cattle, here we profiled miRNA expression in centrifugally prepared exosomes from the plasma of both grazing and housed Japanese Shorthorn cattle. Microarray analysis of the c-miRNAs resulted in detection of a total of 231 bovine exosomal miRNAs in the plasma, with a constant expression level of let-7g across the duration and cattle groups. Expression of muscle-specific miRNAs such as miR-1, miR-133a, miR-206, miR-208a/b, and miR-499 were undetectable, suggesting the mildness of grazing movement as exercise. Changes in miRNA expression in plasma exosome of cattle was measured at during 0, 1, 2 and 4 months of grazing or housing. Plasma exosome samples prepared from three cattle for each treatment were collected and mixed within the treatment at each time for microarray analysis .

2016-07-03 | E-GEOD-69717 | biostudies-arrayexpress

Transcriptome reponse of Phaeodactylum tricornutum to grazing effect

Project description:RNA-sequencing was used to evaluate the transcriptomic response to grazing stress for P. tricornutum strain CCAP 1055/1.

2017-01-10 | GSE93297 | GEO

RNA-seq of human gut bacterial isolates grown on seaweed polysaccharides

Project description:Purpose: Examining the transcriptome of human gut bacteria that grow on seaweed polysaccharides as a sole carbon source Methods: Strains were grown on 5 mg/ml seaweed polysaccharides (carrageenan, agarose and/or poprhyran respective to strain) or galactose as a sole carbon source in vitro. Fold change was calculated as seaweed polysaccharide over galactose with n=2 biological replicates. Once cells reached an optical density corresponding to mid-log phase growth, RNA was isolated and rRNA depleted. Samples were multiplexed for sequencing on the Illumina HiSeq platform at the University of Michigan Sequencing Core. Data was analyzed using Arraystar software (DNASTAR, Inc.) Genes with significant up- or down-regulation were determined by the following criteria: genes with an average fold-change >10-fold and with both biological replicates with a normalized expression level >1% of the overall average RPKM expression level. READS WERE ANALYZED .......GABRIEL FILL IN Results: We identified novel polysaccharide utiilization loci in 5 strains of human gut bacteria

2020-09-01 | GSE149357 | GEO

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