Project description:The objective of the study was to understand the mechanism of the interaction between Arabidopsis thaliana and SA190 under drought stress.
Project description:au13-08_atpplaii-alpha - transcriptional profilling of arabidopsis plants. Understanding the physiological role of pPLAIIα; under control and drought stress conditions. Study on empty vector, overexpressor and antisense A. thaliana lines.
Project description:Transcriptional profiling of Arabidopsis thaliana cotyledons comparing ecotype Col-0 (Control) with lea13 T-DNA line to elucidate the response mechanism to drought stress conditions that rely on LEA protein function.
Project description:• Among many mRNA modifications, adenine methylation at the N6 position (N6-methyladenosine, m6A) is known to affect mRNA biology extensively. The influence of m6A has yet to be assessed under drought, one of the most impactful abiotic stresses. • We show that Arabidopsis thaliana (L.) Heynh. (Arabidopsis) plants lacking mRNA ADENOSINE METHYLASE (MTA) are drought sensitive. Subsequently, we comprehensively assess the impacts of MTA-dependent m6A changes during drought on mRNA abundance, stability, and translation in Arabidopsis. • During drought, there is a global trend towards hyper-methylation of many protein-coding transcripts that does not occur in mta. We also observe complex regulation of m6A at a transcript-specific level, possibly reflecting compensation by other m6A components. Importantly, a subset of transcripts that are hyper-methylated in an MTA-dependent manner exhibited reduced turnover and translation in mta, compared to wild-type plants, during drought. Additionally, MTA impacts transcript stability and translation independently of m6A. We also correlate drought-associated deposition of m6A with increased translation of modulators of drought response, such as RD29A, COR47, COR413, ALDH2B, ERD7, and ABF4 in WT, which is impaired in mta. • m6A is dynamic during drought and, alongside MTA, promotes tolerance by regulating drought-responsive changes in transcript turnover and translation.
Project description:Transcriptome analysis on young developing leaves of 6 Arabidopsis thaliana accessions (An1, Blh1, Col0, Cvi0, Oy0, Sha) subjected to control and mild drought conditions.
Project description:The leaf transcriptome of the Arabidopsis thaliana aquaporin gene PIP1;2 T-DNA insertion line was compared to that of control plants. In total 730 genes were found to be differentially regulated. This regulation pattern was compared to mild drought stress and low CO2 Affymetrix data to elucidate whether loss of the aquaporin resembles transcriptomic changes of drought stress or lack of CO2 supply. Mild drought stress data were obtained from Harb A, Krishnan A, Ambavaram MMR, Pereira A (2010) Molecular and Physiological Analysis of Drought Stress in Arabidopsis Reveals Early Responses Leading to Acclimation in Plant Growth. Plant Physiology 154: 1254-1271 (GSE24177). Low CO2 data were obtained from Oliver E. Bläsing, Yves Gibon, Manuela Günther, Melanie Höhne, Rosa Morcuende, Daniel Osuna, Oliver Thimm, Björn Usadel, Wolf-Rüdiger Scheible, and Mark Stitt (2005) Sugars and Circadian Regulation Make Major Contributions to the Global Regulation of Diurnal Gene Expression in Arabidopsis. The Plant Cell, Vol. 17, 3257-3281 (GSE3423).
Project description:RNA-seq data of Arabidopsis thaliana accessions exposed to mild drought or control treatments. The sampled tissue is the third leaf at the last day of proliferation (cell division phase).
Project description:N-terminal protein acetylation is one of the most common protein modifications in eucaryotes and is catalyzed co-translationally by N-terminal aceytltransferases (Nats). Regarding the number of predictaed substrates, NatA is the main Nat complex in human and yeast and is composed of the catalytic subunit NAA10 and the auxilliary subunit NAA15. The down-regulation of NAA10 and NAA15 results in Arabidopsis in drought resistant plants. This study focus on the identification of altered gene expression leading to the drought resistant phenotype. Microarray analysis was used to identify misregulated genes in the NatA depleted mutants responsible for the drought resistant phenotype Arabidopsis thaliana plants were grown on soil for 6 weeks under short-day conditions (8h light / 16h dark cycles) with normal watering and subsequently challenged with drought for 10 days. After 10 days of drought Arabidopsis leaf material was harvested and used for RNA extraction and hybridization on Affymetrix microarrays. Four biological replicates from each genotype and condition were analyzed.
Project description:High-throughput sequencing of Arabidopsis thaliana endogenous small RNAs by 454 pyrosequencing. Keywords: high-throughput sequencing
