Unknown,Transcriptomics,Genomics,Proteomics

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ThERF1 regulates its target genes via binding a novel cis-acting element in response to salt stress

ABSTRACT: To reveal the regulatory network of ThERF1 in response to abiotic stress, we have employed an Agilent Arabidopsis gene expression microarray to study the expression profile changes between Wild-type and transgenic plants overexpressing ThERF1 under salt stress. A total of 154 and 307 differentially expressed genes with p-value < 0.05 and M-bM-^IM-% 2-fold change were significantly up- and down- regulated in ThERF1-transformed plants under salt stress treatment. Four-week-old seedlings of Wild-type and ThERF1-transformed Arabidopsis plants treated with 120 mM NaCl for 6 h were immediately harvested for RNA isolation. The Agilent Arabidopsis (V4) gene expression microarray (4M-CM-^W 44K, Design ID: 021169) was employed to compare the gene expression profiles of Wild-type and transgenic plants with three independent biological replicates.

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Liuqiang Wang

PROVIDER: E-GEOD-57847 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:We have implemented an integrated Systems Biology approach to analyze overall transcriptomic reprogramming and systems level defense responses in the model plant Arabidopsis thaliana during an insect (Brevicoryne brassicae) and a bacterial (Pseudomonas syringae pv. tomato strain DC3000) attack. The main aim of this study was to identify the attacker-specific and general defense response signatures in the model plant Arabidopsis thaliana while attacked by phloem feeding aphids or pathogenic bacteria. Defense responses and networks, unique and specific for aphid or Pseudomonas stresses were identified. Our analysis revealed a probable link between biotic stress and microRNAs in Arabidopsis and thus opened up a new direction to conduct large-scale targeted experiments to explore detailed regulatory links among them. The presented results provide a first comprehensive understanding of Arabidopsis - B. brassicae and Arabidopsis - P. syringae interactions at a systems biology level. Arabidopsis thaliana (ecotype Colombia-0) seeds were grown in 6-cm-diameter pots filled with a sterile soil mix (1.0 part soil and 0.5 part horticultural perlite), 3 plants per pot. Plants were kept in growth chambers VM-CM-6tsch VB 1514 (VM-CM-6tsch Industrietechnik GmbH, Germany) under the following conditions: a 8/16 h (light/dark) photoperiod at 22M-BM-0C/18M-BM-0C, 40%/70% relative humidity, and 70/0 M-NM-<mol m-2s-1 light intensity. After 32 days plants had 8 fully developed leaves. Each plant was infested with 32 wingless aphids [Brevicoryne Brassicae] (4 per leaf), which were transferred to leaves with a fine paintbrush. Infested plants and aphid-free controls were kept in plexiglass cylinders. Plants were harvested 72 h after infestation between the 6th and 8th hour of the light photoperiod. Four biological replicates were prepared from aphid infested and control plants, each sampled from 15 individual plants. Whole rosettes were cut at the hypocotyls and aphids were removed by washing with Milli-Q-filtered water. Differences in transcriptional responses were measured by comparing genes expression of aphid infested plants against non-infested control plants.

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ThERF1 regulates its target genes via binding a novel cis-acting element in response to salt stress

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