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A plant-specific ISWI subunit is involved in fertility by inhibiting the pistil overgrowth

ABSTRACT: A plant-specific ISWI subunit is involved in fertility by inhibiting the pistil overgrowth

PROVIDER: PRJNA607459 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11110274.fastq.gz	Fastqsanger.gz
	SRR11110275.fastq.gz	Fastqsanger.gz
	SRR11110276.fastq.gz	Fastqsanger.gz
	SRR11110277.fastq.gz	Fastqsanger.gz
	SRR11110278.fastq.gz	Fastqsanger.gz

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A plant-specific ISWI subunit is involved in fertility by inhibiting the pistil overgrowth

Project description:we identified the forkhead-associated domain 2 (FHA2) as a plant-specific subunit of an ISWI chromatin-remodeling complex in Arabidopsis. By in vivo and in vitro analyses, we demonstrated that FHA2 directly binds to RLT1 and RLT2, two redundant subunits of the ISWI complex in Arabidopsis. A reduced-fertility phenotype was observed in both the fha2 and rlt1/2 mutant plants and the phenotype was ascribed to overgrowth of the pistil during the floral development. However, the early-flowering phenotype of the rlt1/2 mutant was not shared by the fha2 mutant. Consistently, our RNA-seq analysis indicated that the fha2 mutant affects a subset of rlt1/2-regulated genes but not genes involved in the regulation of flowering time. This study demonstrates that FHA2 functions as a previously uncharacterized subunit of the Arabidopsis ISWI complex to exclusively regulate the pistil growth during the floral development.

2020-05-19 | GSE145514 | GEO

Arabidopsis unfertilized pistil development and senescence

Project description:Transcription profiling of post-anthesis unfertilized pistil development and senescence in Arabidopsis, in a serie including samples from seven different stages according to pistil age in days post-anthesis (dpa). The time course started at anthesis and ended at 12-14 dpa, several days later of the loss of fruit set capacity. Keywords: Developmental time course

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Rice Pistil LC-MSMS - Analysis of Phosphoproteome in Rice Pistil

Project description:Here we report a phosphoproteomic study on mature pistil of rice

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Transcriptomic analysis reveals genes releated to pistil abortion in Prunus sibirica

Project description:Pistil development is an important developmental process that directly affects the yield of Prunus sibirica. Through transcriptome sequencing analysis of clones with abortive pistil (No. 595) and normal pistil (No. 28) of Prunus sibirica, a total of 1950 significantly differentially expressed genes were obtained, among which 1000 genes were up-regulated and 950 genes were down-regulated. The results provide a theoretical basis for further investigation of the formation mechanism of pistil abortion.

2022-07-06 | GSE192952 | GEO

Comprehensive transcriptome analysis provides novel insight into pistil abortion mechanism in Japanese apricot

Project description:Flower development is a key stage in the life cycle of fruit trees and its proper development is considered its reproductive success. Pistil abortion is a widely distributed phenomenon in fruit plants and its mechanism in Japanese apricot is quite unclear. The present study was carried out to get a deep insight about the regulatory mechanism of pistil abortion in Japanese apricot using transcriptomic approach. A large number of DEGs (24,683) were identified in normal (N) and abortive pistil stages i.e. style browning (STYB), stigma browning (STIB) and ovary browning (OVB). Pair-wise comparison analysis was performed as N vs STYB, N vs STIB, N vs OVB and STIB vs OVB, and produced 9592, 8691, 8660 and 8103 transcripts, respectively. The Gene Ontology (GO) showed that different metabolic processes, plant hormones, flower development and photosystem related genes were involved in pistil abortion. The pathway analysis revealed that plant hormones signal transduction and circadian rhythm pathways were found significantly enriched. Furthermore, transcription factors such as MYB, MADS-box and NAC family remained highly expressed. Maximum number of the genes were grouped to cluster 11, and were highly expressed at OVB stage, suggesting that this stage might be critical for pistil abortion. This study provides an alternatives to be consider for further studies and understanding of pistil abortion processes in Japanese apricot, and provide a reference related to this issue for other deciduous fruit crops.

2021-06-28 | GSE141096 | GEO

Affinity Purification of ISWI chromatin remodeler in Trypanosoma cruzi

Project description:Chromatin remodeling is a general mechanism involved in DNA-dependent processes, including gene expression regulation. ISWI ATPase is the catalytic subunit in diverse chromatin remodeling complexes that changing histone–DNA interactions and therefore play a pivotal role in different nuclear processes. Here, the ISWI remodeler was fused to GFP (NH and CO fusions) and its partners were determined by affinity purification-mass spectrometry (MS) assay. This approach identified known ISWI partners (NLP, RCCP and FYRP), previously characterized in T. brucei, and new components of TcISWI complex (DRBD2, DHH1 and proteins containing SMC domains).

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CDK4/6 inhibitor-mediated cell overgrowth triggers an osmotic stress response

Project description:Cell size and the cell cycle are intrinsically coupled and abnormal increases in cell size are associated with senescence and permanent cell cycle arrest. The mechanism by which overgrowth primes cells to withdraw from the cell cycle remains unknown. We investigate this here using CDK4/6 inhibitors that arrest cell cycle progression during G0/G1 and are used in the clinic to treat ER+/HER2- metastatic breast cancer. We demonstrate that CDK4/6 inhibition promotes cellular overgrowth during G0/G1, causing p38MAPK-p53-p21-dependent cell cycle withdrawal. We find that cell cycle withdrawal is triggered by two waves of p21 induction. First, overgrowth during a long-term G0/G1 arrest induces an osmotic stress response. This stress response produces the first wave of p21 induction. Second, when CDK4/6 inhibitors are removed, a fraction of cells escape long term G0/G1 arrest and enter S-phase where overgrowth-driven replication stress results in a second wave of p21 induction that causes cell cycle withdrawal from G2, or the subsequent G1. We propose a model whereby both waves of p21 induction contribute to promote permanent cell cycle arrest. This model could explain why cellular hypertrophy is associated with senescence and why CDK4/6 inhibitors have long-lasting effects in patients.

2023-11-27 | PXD036519 | Pride

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