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Transcriptome analyses of Arabidopsis natural accessions Col-0 and IP-Svi-0 at different tempearatures

ABSTRACT: Plants are sessile organisms; thus they developed sophisticated endogenous mechanisms to detect and respond to various environmental cues . Our planet has diverse light and temperature conditions, to adopt in such a wide range of climatic conditions plants must have phenotypic plasticity. In addition to phenotypic plasticity plants also have variations in ontogenetic trajectory that results from genetic and epigenetic modifications leading to differential growth response to varying environment. To ensure successful adaptation and survivability in diverse climatic conditions a number of genetic polymorphisms are accumulated in various natural accessions of Arabidopsis. In this study, we investigated the reasons of photoperiod and temperature insensitive early flowering phenotype of San Vicente (IP-Svi-0) which was collected from San Vicente, Spain (Latitude: 43.39; Longitude: -7.39). Our RNA seq analysis showed decreased expression of MAF1-3 and 5

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE304564 | GEO | 2026/04/09

REPOSITORIES: GEO

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Project description:The Western Antarctic Peninsula (WAP) is among the areas of the planet showing some of the most significant increases in air and water temperature. It is projected that increasing temperature will modulate communities of coastal ecosystems at species ecological performance and molecular composition. The main way that the organisms can cope with large thermal variation is by having a reversible phenotypic plasticity, which provides the organisms with a compensatory physiological response when facing challenging conditions. However, since Antarctic organisms have evolved in a very cold and stable environment. The giant Antarctic isopod Glyptonotus antarcticus is one of the most abundant in Antarctic waters. This species has a larval development inside of maternal marsupium, where juveniles have a short period to acclimate to environmental conditions after birth. In this sense, we hypothesize that juveniles exposed to unusual temperature increases even for short periods, would not respond adequately showing a narrow phenotypic plasticity. We assessed if early juveniles of G. antarcticus have the molecular plasticity when exposed to increased temperature at 5¡C during 1, 6, 12, and 24 hours in comparison to control 0¡C. Sequenced HIseq2000 libraries were compared between control and each treatment to detect differentially expressed transcripts. The main molecular pathways affected by thermal stress were antioxidants, proteases, endopeptidases, and ubiquitination transcripts which were up-regulated, and mitochondrial respiratory chain, cuticle, cytoskeleton, and a molt transcript which were down-regulated. Considering HSP transcript, only 3 were up-regulated at least in two points of the stress kinetic, without classical HSP70 and HSP90 transcripts. This study shows that juveniles of G. antarcticus do not show molecular phenotypic plasticity to cope with acute short-term heat stress, even for one or few hours of exposure without an eco-physiological capacity to respond. This may have consequences at the ecological population level, showing a reduced individual ability to survive decreasing population recruitment.

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Transcriptome analyses of Arabidopsis natural accessions Col-0 and IP-Svi-0 at different tempearatures

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