Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Expression data from WT, MPK6 Overexpression, and mpk6 T-DNA knockout Arabidopsis root and shoot under hypoxic and mock conditions

ABSTRACT: MPK6 shows transient increase in activity under hypoxia with maximal activity at 2 hrs. To study the role of MPK6 in hypoxia in Arabidopsis, 10 do seedlings of WT, mpk6 and MPK6 plants were exposed to 2 hrs hypoxia and 2hr air (mock). Because there are no major phenotypic differences between the genotypes, microarray was used to determine if there were transcript level differences between the genotypes. Wild type Col-0, MPK6 overexpression and mpk6 knockout mutants were exposed to 2 hr hypoxia and air and separated into root and shoot in order to determine the role of MPK6 in hypoxia in both root and shoot.

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Charles Jang

PROVIDER: E-GEOD-31158 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Transient MPK6 activation in response to oxygen deprivation and reoxygenation is mediated by mitochondria and aids seedling survival in Arabidopsis.

Chang Ruth R Jang Charles J H CJ Branco-Price Cristina C Nghiem Peter P Bailey-Serres Julia J

Plant molecular biology 20111116 1-2

Mitogen-activated protein kinases (MPKs) are regulated by diverse stresses with a reactive oxygen species (ROS) component. Here, we report the rapid and transient activation of MPK3, MPK4 and MPK6 upon oxygen deprivation as well as reoxygenation in seedlings of Arabidopsis thaliana. MPK activation peaked within 2 h of oxygen deprivation and again at a higher magnitude within 5 min of reoxygenation. MPK6 was the predominant kinase regulated by oxygen availability in both aerial and root tissue, e ...[more]

PMID: 22086331

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Project description:Plant organs are comprised of distinct cell types with unique assemblages of mRNAs. This is a collection of CEL files of mRNA profiles of the total steady-state mRNAs and polysomal mRNAs of distinct cell types of the whole root and shoot of 7-d-old Arabidopsis thaliana seedlings. The cell type specific mRNA populations are those present in ribosome-mRNA complexes. This sub-population of mRNAs was obtained by first establishing a collection of Arabidopsis lines that express a FLAG-epitope tagged ribosomal protein L18 (RPL18) directed by promoters expressed in specific cell types and regions. Thirteen different promoter:FLAG-RPL18 lines were used. The targeted cell types and promoters included root atrichoblast (non-hair) epidermal cells (pGL2), root endodermis (pSCR), root stelar xylem and pericycle (pWOL, pSHR), root phloem companion cells (phloem CC) (pSUC2, pSultr2;2), root proliferating cells (pRPL11C), root cortex meristematic cells (pCO2), root cortex elongation/maturation cells (pPEP), shoot mesophyll (pRBCS), shoot epidermis (pCER5), shoot guard cells (pKAT1), shoot bundle sheath (pSultr2;2), shoot phloem CC (pSUC2) and shoot trichomes (pGL2). A CaMV 35S promoter:FLAG-RPL18 line was used to obtain the polysomal mRNA of multiple cell types. The immunopurification of ribosome-mRNA complexes of specific cell types/regions was accomplished by the method described in Zanetti et al. (Plant Physiology, 138, 624-635; 2005). Hybridization of the immunopurified mRNAs to the Affymetrix ATH1 DNA microarray platform and subsequent data analysis permitted the identification of transcripts that are enriched or depleted in specific cell types/regions of roots and shoots. The dataset includes samples from cell types/regions from seedlings grown under control conditions and cell types/regions of seedlings exposed to low oxygen stress (hypoxia) for 2 h. Experiment Overall Design: 79 samples, 2 conditions (2 h hypoxia stress, 2 h non-stress), 2 RNA pools (Total mRNA and polysomal mRNA), 2 organs, 13 promoter lines, 2-4 replicates

Dataset Information

Expression data from WT, MPK6 Overexpression, and mpk6 T-DNA knockout Arabidopsis root and shoot under hypoxic and mock conditions

Publications

Transient MPK6 activation in response to oxygen deprivation and reoxygenation is mediated by mitochondria and aids seedling survival in Arabidopsis.

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