Arabidopsis thaliana
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA239569 | ENA |
REPOSITORIES: ENA
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Project description:To exlore more circRNAs involved in Arabidopsis thaliana, we deeply sequenced 14 samples including whole plants from four developmental stages (rosette leaves > 1 mm in length; rosette growth complete; 50% of flowers to be produced have opened; first silique shattered), aerial part of plants from four stress treatments (control, drought, salinity and heat), five organs (roots, stems, leaves, flowers and siliques) and a mixed sample from whole plants across the lifespan (cotyledons emergence, rosette leaves﹥1 mm, rosette growth complete, first flower open, flourishing florescence, first silique shattered, senescence). The total RNA was purified by rRNA-depletion and linear RNA removal with RNAseR, and paired-end (PE) sequenced by Illumina HiSeq 2500 (read length, PE125, the mixed sample) and Illumina Hiseq X Ten (read length, PE150, 13 independent samples) platforms. We obtained 181.97 Gb raw data (151.37 Gb from 13 samples and 30.6 Gb from a mixed sample) and identified 5861 circRNAs with expression quantity. We annotated the parent genes of these circRNAs and predicted their target sites of microRNAs.
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Project description:Plant drought stress response and resistance are complex biological processes that merit systems-level analyses to dissect drought stress encountered by crops in the field. We have used gene expression profiling of Arabidopsis plants subjected to a controlled, sublethal, moderate drought (mDr) treatment to characterize early and late response to drought. We have also compared these profiles to those from plants treated with soil water deficit (progressive) drought (pDr) to reveal acclimation responses in plants.
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Project description:With frequent fluctuations in global climate, plants often experience co-occurring dry-wet cycles and pathogen infection and this combination adversely affects plant survival. In the past, some studies indicated that morpho-physiological responses of plants to the combined stress are different from the individual stressed plants. However, interaction of drought stressed or drought recovered plants with pathogen has not been widely studied at molecular level. Such studies are important to understand the defense pathways that operate as part of combined stress tolerance mechanism. In this study, Arabidopsis plants were exposed to individual drought stress (soil drying at 40% FC, D), Pseudomonas syringae pv tomato DC3000 (PStDC3000), infection and their combination. Plants recovered from drought stress were also exposed to PStDC3000. Beside we have also infiltrated P. syringae pv tabaci (PSta, non-host pathogen) individually or in combination with drought stress. Using Affymetrix WT gene 1.0 ST array, global transcriptome profiling of plants leaves under individual drought stress and pathogen infection was compared with their combination. Results implicate that plants exposed to combined drought and pathogen stress experience a new state of stress where each combination of stressor and their timing defines the plant responses and thus should be studied explicitly. Global transcriptional analysis in Arabidopsis leaves exposed to individual and combined drought and pathogen stress.
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