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Global analysis of non-coding small RNAs in Arabidopsis in response to jasmonate treatment by deep sequencing technology

ABSTRACT: In plants, non-coding small RNAs play a vital role for plant development and stress responses. To explore the possible role of non-coding small RNAs in the regulation of the jasmonate (JA) pathway, we compared the non-coding small RNAs between the JA-deficient aos mutant and the JA-treated wild type Arabidopsis via high-throughput sequencing. 30 new miRNAs and 27 new miRNA candidates were identified through a bioinformatics approach. 49 known miRNAs (belonging to 24 families), 15 new miRNAs and new miRNA candidates (belonging to 11 families) and 3 tasiRNA families were induced by JA, whereas 1 new miRNA, 1 tasiRNA family and 22 known miRNAs (belonging to 9 families) were repressed by JA.

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE34497 | GEO | 2014/12/16

SECONDARY ACCESSION(S): PRJNA151315

REPOSITORIES: GEO

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Global analysis of non-coding small RNAs in Arabidopsis in response to jasmonate treatment by deep sequencing technology

Project description:In plants, non-coding small RNAs play a vital role for plant development and stress responses. To explore the possible role of non-coding small RNAs in the regulation of the jasmonate (JA) pathway, we compared the non-coding small RNAs between the JA-deficient aos mutant and the JA-treated wild type Arabidopsis via high-throughput sequencing. 30 new miRNAs and 27 new miRNA candidates were identified through a bioinformatics approach. 49 known miRNAs (belonging to 24 families), 15 new miRNAs and new miRNA candidates (belonging to 11 families) and 3 tasiRNA families were induced by JA, whereas 1 new miRNA, 1 tasiRNA family and 22 known miRNAs (belonging to 9 families) were repressed by JA. 2 samples were examined: wild type treated with JA, and the JA-deficient aos mutant.

2014-12-16 | E-GEOD-34497 | biostudies-arrayexpress

miRNAs target conserved motifs of diverse genes encoding NB-LRRs to trigger trans-acting siRNAs in legumes.

Project description:Trans-acting siRNAs (tasiRNAs) negatively regulate target transcripts and are characterized by siRNAs spaced in 21-nucleotide 'phased' intervals. TasiRNAs have not been extensively described in many plant species. We identified dozens of new miRNAs in Medicago and soybean and confirmed 119 Medicago targets. A search for phased tasiRNA-like small RNAs ('phasiRNAs') found at least 114 Medicago loci, the majority of which were NB-LRR encoding genes. Notably, conserved domains in NB-LRR-encoding RNAs are targeted by several 22-nt miRNA families to trigger phasiRNA production. DCL2 and SGS3 transcripts were also cleaved by these 22-nt miRNAs, generating phased small RNAs, suggesting synchronization between silencing and pathogen defense pathways. A second example of 'two-hit' phasiRNA processing was identified, utilizing miR156-miR172 sites. Our data illustrate a complex tasiRNA-mediated regulatory circuit that potentially modulates plant-microbe interactions. A few miRNA triggers regulate an extremely large gene family by targeting highly conserved protein motif-encoding sequences, representing a new paradigm for miRNA function.

2011-10-24 | GSE31061 | GEO

miRNAs target conserved motifs of diverse genes encoding NB-LRRs to trigger trans-acting siRNAs in legumes.

2011-10-24 | E-GEOD-31061 | biostudies-arrayexpress

Low oxygen responsive small RNAs in Arabidopsis

Project description:Low-oxygen stress associated with natural phenomena such as waterlogging, results in widespread transcriptome changes and a metabolic switch from aerobic respiration to anaerobic fermentation. High-throughput sequencing of small RNA libraries obtained from low-oxygen stressed and control root tissue identified a total of 65 unique microRNA (miRNA) sequences from 46 families, and 14 trans-acting small interfering RNA (tasiRNA) from 3 families. Low-oxygen stress resulted in changes to the abundance of 46 miRNAs from 19 families, and all 3 tasiRNA families. Chemical inhibition of mitochondrial respiration caused similar changes in expression in a majority of the low-oxygen responsive small RNAs analysed. Our data indicate that miRNAs and tasiRNAs play a role in gene regulation and possibly developmental responses to low oxygen, and that a major signal for these responses is likely to be dependent on mitochondrial function. Keywords: Small RNA transcriptome analysis

2009-10-01 | GSE16971 | GEO

Low oxygen responsive small RNAs in Arabidopsis

2009-09-30 | E-GEOD-16971 | biostudies-arrayexpress

Differential expression of miRNAs in response to topping in tobacco roots

Project description:Topping is an important cultivating measure for flue-cured tobacco, and many genes had been found to be differentially expressed in response to topping. But it is still unclear how these genes are regulated. MiRNAs play a critical role in post-transcriptional gene regulation, so we sequenced two sRNA libraries from tobacco roots before and after topping, with a view to exploring transcriptional differences in miRNAs.Two sRNA libraries were generated from tobacco roots before and after topping. Solexa high-throughput sequencing of tobacco small RNAs revealed a total of 12,104,207 and 11,292,018 reads representing 3,633,398 and 3,084,102 distinct sequences before and after topping. The expressions of 136 conserved miRNAs (belonging to 32 families) and 126 new miRNAs (belonging to 77 families) were determined. There were three major conserved miRNAs families (nta-miR156, nta-miR172 and nta-miR171) and two major new miRNAs families (nta-miRn2 and nta-miRn26). All of these identified miRNAs can be folded into characteristic miRNA stem-loop secondary hairpin structures, and qRT-PCR was adopted to validate and measure the expression of miRNAs. Putative targets were identified for 133 out of 136 conserved miRNAs and 126 new miRNAs. Of these miRNAs whose targets had been identified, the miRNAs which change markedly (>2 folds) belong to 53 families and their targets have different biological functions including development, response to stress, response to hormone, N metabolism, C metabolism, signal transduction, nucleic acid metabolism and other metabolism. Some interesting targets for miRNAs had been determined. 2 samples examined:roots before and after topping

2014-11-01 | E-GEOD-33370 | biostudies-arrayexpress

Differential expression of miRNAs in response to topping in tobacco roots

2014-11-01 | GSE33370 | GEO

Microarray identification of conserved microRNAs in Pinellia pedatisecta

Project description:An in situ synthesized custom miRNA microarray was employed to detect miRNAs from P. pedatisecta, A total of 99 miRNAs belonging to 22 miRNA families were identified.

2014-01-01 | GSE33915 | GEO

Identification of miRNAs and its targets using high-throughput sequencing and degradome analysis in male and female Asparagus officinalis.

Project description:Two independent small RNA (sRNA) libraries from male and female asparagus plants were sequenced, generating 4.13 and 5.88 million final cleaned reads, respectively. A total of 154 conserved miRNA belonging to 26 families, and 40 novel miRNA candidates that seemed to be specific to asparagus were identified, among them, 63 miRNAs exhibited significant differential expression between male and female plants, and 36 target mRNAs representing 44 conserved and fournovel miRNA in asparagus by high-throughput degradome sequencing analysis.

2015-09-02 | GSE72594 | GEO

Genome-wide profiling of miRNAs and other small non-coding RNAs in the Verticillium dahliae inoculated cotton roots

Project description:MicroRNAs (miRNAs) and small interfering RNAs (siRNAs) are short (19â25 nucleotides) non-coding RNA molecules that have large-scale regulatory effects on development and on stress responses in plants.The objective of this study is to investigate the transcriptional profile of miRNAs and other small non-coding RNAs in Verticilliumâinoculated cotton roots. Four small RNA libraries were constructed from mocked and infected roots of two cotton cultured species which are with different Verticillium tolerance (âHai-7124â, Gossypium barbadense L., a Verticillium-tolerant cultivar, and âYi-11â, Gossypium hirsutum L. a Verticillium-sensitive cultivar). The length distribution of obtained small RNA pools was significantly different among libraries. A total of 215 conserved miRNA families were identified in the two cotton species, of them 14 are novel. There were >65 families with different expression between two libraries. We also identified two ta-siRNAs and thousands of endogenous siRNA candidates, and hundred of them exhibited altered expression after inoculation of Verticillium. The profiling of these miRNAs and other small non-coding RNAs lay the foundation for further understanding of small RNAs function in the regulation of Verticillium defence responses in cotton roots. Examination of 2 different traetments in 2 cotton types.

2011-04-29 | E-GEOD-28236 | biostudies-arrayexpress

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