Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcriptional profiling by array of Arabidopsis thaliana closed floral buds from young primary inflorescences of wild type (Ws-3) and DRINK ME (AT2G21230) overexpression line.

ABSTRACT: The Arabidopsis thaliana DRINK ME gene (bZIP30; AT2G21230) is a member of the bZIP transcription factor family. Overexpression of DKM leads to a dwarf plant phenotype and defects in meristematic and reproductive tissues. This experiment aims at identifying the differentially experessed genes between wild type (Ws-3) and 35S::DKM inflorescences (with closed buds).

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Stefan de Folter

PROVIDER: E-MTAB-4037 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Altered expression of the bZIP transcription factor DRINK ME affects growth and reproductive development in Arabidopsis thaliana.

Lozano-Sotomayor Paulina P Chávez Montes Ricardo A RA Silvestre-Vañó Marina M Herrera-Ubaldo Humberto H Greco Raffaella R Pablo-Villa Jeanneth J Galliani Bianca M BM Diaz-Ramirez David D Weemen Mieke M Boutilier Kim K Pereira Andy A Colombo Lucia L Madueño Francisco F Marsch-Martínez Nayelli N de Folter Stefan S

The Plant journal : for cell and molecular biology 20160927 3

Here we describe an uncharacterized gene that negatively influences Arabidopsis growth and reproductive development. DRINK ME (DKM; bZIP30) is a member of the bZIP transcription factor family, and is expressed in meristematic tissues such as the inflorescence meristem (IM), floral meristem (FM), and carpel margin meristem (CMM). Altered DKM expression affects meristematic tissues and reproductive organ development, including the gynoecium, which is the female reproductive structure and is determ ...[more]

PMID: 27402171

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Project description:Senescence is genetically-controlled and activated in mature tissues during ageing. However, immature plant tissues also display senescence-like symptoms when continuously exposed to adverse energy-depleting conditions. We used detached dark-held immature inflorescences of Arabidopsis thaliana to understand the metabolic reprogramming occurring in immature tissues transitioning from rapid growth to precocious senescence. Macroscopic growth of the detached inflorescences rapidly ceased upon placement in water in the dark at 21M-BM-0C. Inflorescences were completely de-greened by 120 h of dark incubation and by 24 h had already lost 24% of their chlorophyll and 34% of their protein content. Comparative transcriptome profiling at 24 h revealed that inflorescences response at 24 h had a large carbon-deprivation component. Genes that positively regulate developmental senescence (ANAC092) and shade avoidance syndrome (PIF4 and PIF5) were up-regulated within 24 h. Mutations in these genes delayed de-greening of the inflorescences. Their up-regulation was suppressed in dark-held inflorescences by glucose treatment, which promoted macroscopic growth and development and inhibited de-greening of the inflorescences. Detached inflorescences held in the dark for 4 days were still able to re-initiat development to produce siliques upon being brought out to light indicating the transcriptional reprogramming at 24 h was adaptive and reversible. Our results suggest that the response of detached immature tissues to dark storage involves interactions between carbohydrate status sensing and light deprivation signaling and that the dark adaptive response of the tissues appears to utilize some of the same key regulators as developmental senescence. Detached arabidopsis inflorescences were harvested and either immediately snap-frozen in liquid nitrogen and stored at -80M-BM-0C, or placed at 21M-BM-0C on blotting paper moistened with water inside a 2-L black plastic container for RNA extraction and hybridization on Affymetrix microarrays. Ten inflorescences from 10 independent plants were pooled for each time point (0 h or 24 h).

Project description:Our main objectives wereto investigate the molecular mechanisms involved in metal toxicity and detoxification in the field using juvenile yellow perch subjected to differents levels of this metal exposure. Recent local adaptation to pollution has been evidenced in several organisms inhabiting environments heavily contaminated by metals. Nevertheless, the molecular mechanisms underlying adaptation to high metal concentrations are poorly understood, especially in fishes. Yellow perch (Perca flavescens) populations from lakes in the mining area of Rouyn-Noranda (QC, Canada) have been faced with metal contamination for about 90 years. Here, we examine gene transcription patterns of fish reciprocally transplanted between a reference and a metal-contaminated lake and also fish caged in their native lake. After four weeks, 111 genes were differentially transcribed in metal-naÃ¯ve fish transferred to the metal-contaminated lake, revealing a plastic response to metal exposure. Genes involved in the citric cycle and beta-oxidation pathways were under-transcribed, suggesting a potential strategy to mitigate the effects of metal stress by reducing energy turnover. However, metal-contaminated fish transplanted to the reference lake did not show any transcriptomic response, indicating a reduced plastic response capability to sudden reduction in metal concentrations. Moreover, the transcription of other genes, especially ones involved in energy metabolism, was affected by caging. Overall, our results highlight environmental stress response mechanisms in yellow perch at the transcriptomic level and support a rapid adaptive response to metal exposure through genetic assimilation. Comparison between fish Op and OpâOp using a pairwise design corresponding to the cage experiment in the reference lake Opasatica (Op), comparison between fish Du and DuâDu using a pairwise design corresponding to the cage experiment in the metal contaminated lake Dufault (Du), comparison between fish from reference lake transplanted to the metal contaminated lake (OpâDu) and fish from reference lake caged in their own lake (OpâOp) using pairwise design corresponding to the experiment of metal contamination, comparison between fish from metal contaminated lake transplanted to the reference lake (DuâOp) and fish from the metal contaminated lake caged in their own lake (DuâDu) using pairwise design corresponding to the depuration experiment.

Dataset Information

Transcriptional profiling by array of Arabidopsis thaliana closed floral buds from young primary inflorescences of wild type (Ws-3) and DRINK ME (AT2G21230) overexpression line.

Publications

Altered expression of the bZIP transcription factor DRINK ME affects growth and reproductive development in Arabidopsis thaliana.

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