Seedling temperature responses in Arabidopsis RRS-7
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ABSTRACT:
PROVIDER: PRJNA521727 | ENA |
REPOSITORIES: ENA
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Project description:Plants have the capacity to sense and respond to even small changes in ambient temperature. Numerous thermomorphogenic responses can be observed in Seedlings including elongation of the hypocotyl, petioles and the primary root while leaf blade areas are reduced. Main objective of the experiment was the assessment of tissue-specific transcriptome responses in Arabidopsis seedlings exposed to elevated ambient temperatures, 5 days old Arabidopsis seedlings grown at 20°C in LD were shifted for 3 or 24h to 28°C. Control plants were kept at 20°C. At time of harvest, cotyledons and roots were dissected and collected separately from the hypocotyl. To minimize circadian effects, plant material was grown in several successive batches and harvested only for a period of 30 min per timepoint on several consecutive days. Shifts and harvest was performed at midday to late afternoon (see ZT in overall design).
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Project description:The REIL proteins are required for late ribosomal biogenesis and accumulation of the 60S large ribosome subunit in mature leaves of Arabidopsis thaliana upon acclimation to low temperature. To validate these functions in roots, we conducted a multi-level system analysis targeted at understanding defects and compensations responses of reil mutants before acclimation to low temperature and following temperature shift. Hydroponic root tissue enabled analysis of eukaryotic ribosome complexes with negligible interference of organelle ribosomes. Hydroponic cultivation attenuated the growth defect of reil mutants at low temperature and provided new insights into the primary functions of Arabidopsis REIL proteins. Arabidopsis tightly controls the balance of non-translating 40S and 60S subunits. Reil mutants initially deplete both non-translating subunits upon shift to 10°C and subsequently replenish these pools slowly. Reil mutations compensate the 60S biosynthesis defect by increased baseline levels of non-translating 40S and 60S subunits and depletion of a likely non-translating, KCl-sensitive 80S sub-fraction in the cold. We infer that Arabidopsis buffers fluctuating translation demands following temperature cues by activating non-translating ribosome fractions before de novo synthesis meets temperature-induced demands. Reil1 reil2 double mutants accumulate 43S-preinitiation complexes and pre-60S-maturation complexes and affect the paralog composition of non-translating ribosome fractions. With few exceptions, e.g. RPL3B and RPL24C, these changes were not under transcriptional control. Our study suggests requirement of de novo synthesis of eukaryotic ribosomes for long-term cold acclimation. Double mutant analysis indicates feedback control of REIL-mediated 60S maturation on NUC2 and eIF3C2 transcription and implies functions of two so far non-described proteins in late plant ribosome biogenesis. We propose that Arabidopsis requires biosynthesis of specialized ribosomes for successful cold acclimation.
2021-02-03 | GSE144916 | GEO
Project description:The expression levels of Arabidopsis thaliana (Col-0) genes in several developmental stages during the seed-to-seedling transition were measured by using high-density Affymetrix® arrays (Aragene.st1.1). We used a time-series of microarrays to gain temporal resolution and identify relevant genes in the seed-to-seedling transition.
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Project description:We produced RNA-seq reads from messenger RNA isolated from aerial seedling tissue for Arabidopsis thaliana mutants in the HULK gene family. The read data were generated with biological replication (two replicates). The resulting RNA-seq data provide a resource to assess the function of HULK genes in the control of downstream gene expression in A. thaliana.
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Project description:Moderate increases in the ambient temperature promote hypocotyl growth in Arabidopsis, and this response is totally dependent on the proper activity of the auxin, gibberellin, and brassinosteroid pathways. We have analyzed global the changes in gene expression that occur in Arabidopsis seedlings after a moderate increase in the growth temperature (20ºC to 29ºC for 2 hours). In order to understand how the different hormone pathways affect this growth response, the same transcription profiling analysis was conducted in seedlings deficient in each hormone. Keywords: Growth condition
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Project description:14-day-old seedling of WT, val1, val2, and val1val2 were performed RNA-seq to analyzed their differential expression genes in Arabidopsis.
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Project description:In order to investigate possible roles of IDL and PIP/PIPL peptides, the transcriptomic response of Arabidopsis seedlings to treatment with PIPL3 peptide was analysed. PIPL3 (At4g37295) was chosen, as no functional data was available for this peptide; furthermore, PIPL3 was expressed in leaf tissue during seedling stages. Transcriptomic responses to 3 hours PIPL3 peptide treatment suggested a role in regulation of biotic stress responses and cell wall modification.
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Project description:We have sequenced messenger RNA isolated from seedling tissue for 19 accessions of Arabidopsis thaliana (with biological replication). The 19 accessions for which RNA-Seq reads were collected have served as the founders for the MAGIC lines, a high-resolution recombinant inbred line mapping resource. RNA sequencing data was used to examine differential gene expression among the accessions.
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