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Arabidopsis thaliana

ABSTRACT: Differential expression of miRNAs and their target genes in senescing leaves and siliques: insights from massive sequencing of small RNAs and cleaved target RNAs

PROVIDER: PRJNA238653 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR1171800.fastq.gz	Fastqsanger.gz
	SRR1171801.fastq.gz	Fastqsanger.gz
	SRR1171802.fastq.gz	Fastqsanger.gz
	SRR1171803.fastq.gz	Fastqsanger.gz
	SRR1171794.fastq.gz	Fastqsanger.gz

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Arabidopsis thaliana

Project description:Differential expression of miRNAs and their target genes in senescing leaves and siliques: insights from massive sequencing of small RNAs and cleaved target RNAs

| PRJNA238653 | ENA

Understanding the structure/sequence preference of plant miRNA biogenesis machinery

Project description:MicroRNAs (miRNAs) are ~21nt long endogenous non-coding RNAs that are involved in post-transcriptional silencing of target mRNAs. miRNAs are processed from precursors having a stem-loop structure that are recognized and cleaved by Dicer-like 1 (DCL1) with the help of dsRNA binding protein Hyponastic leaves 1 (HYL1) and a zinc finger protein named Serrate (SE). Plant miRNA stem-loops are very diverse in length and structure than animal miRNAs. Hence, mechanism of miRNA biogenesis from their precursors is poorly understood. Our bioinformatic analysis predicted that plant miRNAs have unique sequence signature. An artificial precursor with different predicted sequence signatures was constructed. This construct was expressed transiently in tobacco leaves and small RNAs were sequenced. Our analysis revealed that indeed the predicted sequence signature is prefered by plant miRNA biogenesis machinery.

2017-07-15 | GSE99094 | GEO

Oryza sativa

Project description:Massive analysis of rice small RNAs: Mechanistic implications of regulated miRNAs and variants for differential target RNA cleavage

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Identification of chilling stress-responsive tomato microRNAs and their target genes by high-throughput sequencing and degradome analysis

Project description:To identify tomato miRNAs involved in chilling response, two small RNA libraries and two degradome libraries from chilling-treated(4°C/4°C for 1h，4h, 8h, 12h, 24h and 48h) and non-chilling-treated (25°C/20°C for 1h，4h, 8h, 12h, 24h and 48h)leaves of LA1777’ (S. habrochaites) seedlings were constructed. A total of 4342604 and 7231609 clean reads were obtained by high-throughput sequencing of the two libraries, respectively. 161 conserved miRNAs and 236 novel miRNAs were identified in the two librayies. Of these miRNAs, 192 were upregulated, whereas 205 were downregulated in response to chilling stress. Among these, 23 miRNAs and 26 miRNAs were significantly upregulated and downregulated in response to chilling stress, respectively.Through degradome sequencing,62 target genes were cleaved by 42 conserved miRNAs, while nine target genes were cleaved by nine novel miRNAs. Target gene functional analysis revealed that most target genes played positive role in the chilling response, primarily by regulating the expression of anti-stress proteins, antioxidant enzymes and genes involved in cell wall formation.

2015-03-03 | GSE57335 | GEO

Identification of chilling stress-responsive tomato microRNAs and their target genes by high-throughput sequencing and degradome analysis

Project description:To identify tomato miRNAs involved in chilling response, two small RNA libraries and two degradome libraries from chilling-treated(4M-BM-0C/4M-BM-0C for 1hM-oM-<M-^L4h, 8h, 12h, 24h and 48h) and non-chilling-treated (25M-BM-0C/20M-BM-0C for 1hM-oM-<M-^L4h, 8h, 12h, 24h and 48h)leaves of LA1777M-bM-^@M-^Y (S. habrochaites) seedlings were constructed. A total of 4342604 and 7231609 clean reads were obtained by high-throughput sequencing of the two libraries, respectively. 161 conserved miRNAs and 236 novel miRNAs were identified in the two librayies. Of these miRNAs, 192 were upregulated, whereas 205 were downregulated in response to chilling stress. Among these, 23 miRNAs and 26 miRNAs were significantly upregulated and downregulated in response to chilling stress, respectively.Through degradome sequencing,62 target genes were cleaved by 42 conserved miRNAs, while nine target genes were cleaved by nine novel miRNAs. Target gene functional analysis revealed that most target genes played positive role in the chilling response, primarily by regulating the expression of anti-stress proteins, antioxidant enzymes and genes involved in cell wall formation. tomato miRNA-seq and Degradome-seq after chilling

2015-03-03 | E-GEOD-57335 | biostudies-arrayexpress

Identification and characterization of miRNAs during flag leaf senescence in rice by high-throughput sequencing.

Project description:Senescence is the ultimate stage of plant development. Among the different levels of senescence processes, flag leaf senescence plays a crucial role in determining grain quality in rice. In the present study, efforts are made to identify the possible involvement of miRNAs in flag leaf senescence. Four small RNA libraries were generated from different stages of flag leaf senescence and sequenced by Illumina deep sequencing. A total of 29 known miRNA families and 494 novel miRNAs were identified in the senescing flag leaves. 21 known and 116 novel miRNAs exhibited differential expression pattern. Computational prediction and analysis of putative targets of detected miRNAs revealed that miRNAs regulate the flag leaf senescence mainly by regulating transcription factors and hormone metabolism genes. The present study gives a clue about the senescence-associated miRNAs which can be used as a tool for manipulating flag leaf senescence in rice and other crops.

2021-11-30 | GSE123171 | GEO

Differential expression of miRNAs and their target genes in senescing leaves and siliques: insights from massive sequencing of small RNAs and cleaved target RNAs

Project description:To identify senescence-regulation of miRNAs in Arabidopsis thaliana, eight small RNA libraries were constructed and sequenced at four different stages of development and senescence from both leaves and siliques. Parallel Analysis of RNA Ends (PARE) libraries were also constructed and sequenced to enable the large-scale examination of miRNA-guided cleavage products.

2014-09-08 | GSE55151 | GEO

Transcriptome analysis of annotated coding genes and sORF in 16 organs and 17 environmental conditions at A. thaliana

Project description:There are 16 organ samples (dry seeds, 24H imbibed seeds, 48H imbibed seeds, juvenile rosette, adult rosette, senescence leaves, cauline leaves, stems, young buds, mature flower buds, flowers, young siliques, mature siliques and old siliques) with triplicates. There are 17 samples of different environmental samples (0 h white, 1 h white, 6 h white, 24 h white, dark, blue, far-red and red lights, control, cold 2h, cold 6h, hot 2h, hot 6h, NaCl 2h, NaCl 6h, dry 2h and dry 6h) with triplicates.

2012-09-30 | GSE34188 | GEO

Project description:MicroRNAs (miRNAs) are a class of non-coding small RNAs (sRNAs) that play crucial regulatory roles in various developmental processes. Silique length indirectly influences seed yield in rapeseed (Brassica napus); however, the molecular roles of miRNAs in silique length are largely unknown. Here, backcross progenies of rapeseed with long siliques (LS) and short siliques (SS) were used to elucidate this role. Four small RNA libraries from early developing siliques were sequenced, and a total of 814 non-redundant miRNA precursors were identified, representing 65 known miRNAs, and 394 novel miRNAs. Expression analyses revealed 12 known miRNAs and 5 novel miRNAs that were differentially expressed in LS and SS lines. Furthermore, though two degradome sequencing, we annotated 522 cleavage events. An analysis of correlated expression between differentially expressed miRNAs and their targets demonstrated that some transcription factors might repress cell proliferation or auxin signal transduction to control silique length, and that a Pi/Cu deficiency might also restrict silique development. More significantly, the overexpression of miR160 in rapeseed may repress auxin response factors and result in increased silique length, illustrating that silique length could be regulated via an auxin-response pathway. These results will serve as a foundation for future research in B. napus.

2019-08-01 | GSE107056 | GEO

Identification and Temporal Expression Analysis of Conserved and Novel MicroRNAs in the Leaves of Winter Wheat Grown in the Field

Project description:MicroRNAs (miRNAs) are small non-coding RNAs that regulate target mRNAs by inducing degradation or preventing translation of their target mRNAs. Winter wheat, Triticum aestivum., is an important crop plant, yet there are only a few studies on the association of miRNAs and growth and development of winter wheat grown in the field. Here we carried out experimental analysis of miRNAs in wheat leaves by analyzing small RNA profiles at different growth stages.

2019-10-01 | GSE125391 | GEO

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