Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

The rcf1-1 mutation affects global gene expression in Arabidopsis thaliana with or without cold stress.

ABSTRACT: Cold stress is one of the most severe environmental conditions which cause huge losses in crop production worldwide. We identified an essential regulator of cold-responsive genes and used the Affymetrix whole-genome arrays to define downstream targets of this important protein. We used the microarrays to reveal the effect of rcf1-1 mutation on global gene expression with or without cold stress at 4M-BM-0C. A set of genes differentially expressed in rcf1-1 with or without cold stress are identified. Fourteen-day-old seedlings of Arabidopsis thaliana wild type (Columbia gl1 expressing CBF2::LUC transgene) and rcf1-1 mutant seedlings subjected to cold stress at 4M-BM-0C for 0, 12, and 24 h were used for total RNA extraction and hybridizations with Affymetrix ATH1 GeneChips. There are two biological replicate per genotype.

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Jianhua Zhu

PROVIDER: E-GEOD-39090 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

A DEAD box RNA helicase is critical for pre-mRNA splicing, cold-responsive gene regulation, and cold tolerance in Arabidopsis.

Guan Qingmei Q Guan Qingmei Q Wu Jianmin J Zhang Yanyan Y Jiang Changhua C Liu Renyi R Chai Chenglin C Zhu Jianhua J

The Plant cell 20130131 1

Cold stress resulting from chilling and freezing temperatures substantially reduces crop production worldwide. To identify genes critical for cold tolerance in plants, we screened Arabidopsis thaliana mutants for deregulated expression of a firefly luciferase reporter gene under the control of the C-REPEAT BINDING FACTOR2 (CBF2) promoter (CBF2:LUC). A regulator of CBF gene expression1 (rcf1-1) mutant that is hypersensitive to cold stress was chosen for in-depth characterization. RCF1 encodes a c ...[more]

PMID: 23371945

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Project description:Stress acclimation is an effective mechanism that plants acquired for adaption to dynamic environmental conditions. After undergoing cold acclimation, plants become more tolerant to cold stress. In order to understand the mechanism of cold acclimation, we performed a systematic, comprehensive study of cold response and acclimation in Cassava (Manihot esculenta), a staple crop and major food source in the tropical regions of the world. We profiled mRNA genes and small-RNA species, using next generation sequencing, and performed an integrative analysis of the transcriptome and microRNAome of Cassava across the normal condition, a moderate cold stress at 14M-BM-0C, a harsh stress at 4M-BM-0C after cold acclimation at 14M-BM-0C, and a cold shock from 24M-BM-0C to 4M-BM-0C. Two results from the analysis were striking. First, the moderate stress and cold shock, despite a difference of 10M-BM-0C between the two, triggered comparable degrees of perturbation to the transcriptome; in contrary, further harsh stress after cold acclimation resulted in a much smaller degree of transcriptome variation. Second and more importantly, about two thirds of the up- or down-regulated genes after moderate stress reversed their expression to down- or up-regulation, respectively, under harsh stress after cold acclimation, resulting in a genome-wide rewiring of regulatory networks. MicroRNAs, which are key post-transcriptional gene regulators, were major players in this massive rewiring of genetic circuitry. Further, a function enrichment analysis of the perturbed genes revealed that cold acclimation helped the plant to develop immunity to further harsh stress by exclusively inducing genes with functions of nutrient reservoir; in contrast, many genes with functions of viral reproduction were induced by cold shock. Our study revealed, for the first time, the molecular basis of stress acclimation in plants, and shed lights on the role of microRNA gene regulation in cold response and acclimation in Euphorbia. Three organs/tissues (folded leaf, fully expanded leaf and roots) of Cassava cultivar SC124 harvested at 6h, 24h and 5d for three cold treatments of CA, CCA and CS, for gene expression profiling at the stages of initial response, secondary response, and functional adaption to cold stresses. Total RNA of each sample was isolated individually, and then pooled with an equal amount from each sample into one for profiling. As a result, four mRNA libraries and four small-RNA libraries, corresponding to the conditions of CA, CCA, CS and NC, were constructed.

Dataset Information

The rcf1-1 mutation affects global gene expression in Arabidopsis thaliana with or without cold stress.

Publications

A DEAD box RNA helicase is critical for pre-mRNA splicing, cold-responsive gene regulation, and cold tolerance in Arabidopsis.

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