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Arabidopsis thaliana

ABSTRACT: The PIF4 controlled auxin pathway contributes to hybrid vigor in Arabidopsis thaliana

PROVIDER: PRJNA371457 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5230990_1.fastq.gz	Fastqsanger.gz
	SRR5230990_2.fastq.gz	Fastqsanger.gz
	SRR5231000_1.fastq.gz	Fastqsanger.gz
	SRR5231000_2.fastq.gz	Fastqsanger.gz
	SRR5231010_1.fastq.gz	Fastqsanger.gz

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The PIF4 controlled auxin pathway contributes to hybrid vigor in Arabidopsis thaliana

Project description:F1 hybrids in Arabidopsis and crops species are uniform and high yielding. The F2 generation loses much of the yield advantage and the plants have heterogeneous phenotypes. We generated pure breeding Hybrid Mimic lines by recurrent selection and also selected a pure breeding Small phenotype line. The Hybrid Mimics are almost completely homozygous with chromosome segments from each parent. Four particular chromosomal segments from C24 and eight from Ler were present in all of the Hybrid Mimic lines whereas in the F6 Small phenotype line the 12 segments were each derived from the alternative parent. Loci critical for promoting hybrid vigor may be contained in each of these 12 conserved segments. We have identified genes with similar altered expression in Hybrid Mimics and F1 plants but not in the Small phenotype line. These genes may be critical for the generation of hybrid vigour. Analysis of transcriptomes indicated that increased expression of the transcription factor PHYTOCHROME-INTERACTING FACTOR (PIF4) may contribute to hybrid vigor by targeting the auxin biosynthesis gene YUCCA8 and the auxin signalling gene IAA29. A number of auxin responsive genes promoting leaf growth were upregulated in the F1 hybrids and Hybrid Mimics suggesting increased auxin biosynthesis and signaling contribute to the hybrid phenotype. The Hybrid Mimic seeds had earlier germination as did the seeds of the F1 hybrids indicating co-segregation of the genes for rosette size and the germination trait. Early germination may be an indicator of vigorous hybrids.

2017-04-05 | GSE94547 | GEO

Arabidopsis thaliana

Project description:Hybrid Mimics and Hybrid Vigor in Arabidopsis (F6 data)

| PRJNA275436 | ENA

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Project description:Hybrid Mimics and Hybrid Vigor in Arabidopsis (F4 data)

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2012-05-10 | GSE37899 | GEO

The novel chemical growth regulator ‘Heatin’ stimulates thermomorphogenesis by inhibiting the Arabidopsis thaliana NIT1-subfamily of nitrilases

Project description:Temperature passively affects many biological processes. It is therefore challenging to study dedicated temperature signalling pathways orchestrating plant thermomorphogenesis, a suite of elongation growth-based adaptations that enhance leaf cooling capacity. We screened a chemical library for compounds that restored abolished hypocotyl elongation in the pif4-2 deficient mutant background in the model plant Arabidopsis thaliana to identify novel regulators of thermomorphogenesis. The small aromatic compound ‘Heatin’, with 1-aminomethyl-2-naphthol as minimal active moiety, was isolated as potent enhancer of elongation growth. Following a chemical proteomics approach, the NITRILASE1-subfamily auxin biosynthesis enzymes were identified as molecular targets of Heatin. We show that Heatin inhibits NIT1-subfamily enzymatic activity and that accumulation of its substrate indole-3-acetonitrile (IAN) is sufficient for elongation growth in a NIT1-subfamily-dependent manner. Our work assigns a role for NITRILASE1-subfamily in mediating elongation growth. Moreover, Heatin and its functional analogues present novel chemical entities for understanding auxin biology.

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Arabidopsis thaliana: auxin-treated seedlings versus control seedlings

Project description:Transcriptional profiling of Arabidopsis thaliana seedlings treated with auxin (indole-3-acetic acid), highlighting to the physiological function of auxin by observing early response of gene expressions in Arabidopsis seedlings. Two-condition experiment, auxin-treated seedlings vs. control seedlings. Biological replicates:2 control replicates, 2 auxin-treated.

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Project description:a2e_heterosis - cgh_colvscvi_wg - Arabidopsis thaliana accessions (Col-0, C24 and Cvi) and their hybrid were used to investigate the dynamics of the epigenome after intraspecific hybridization between - Comparative genome hybridization between Arabidopsis thaliana accessions Col-0 and CVi.

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cgh_colvsc24_wg-Analysis of epigenomic changes in hybrids Arabidopsis thaliana Col-0, C24 and Cvi accessions

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2011-05-17 | GSE24831 | GEO

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Project description:This study evaluates the effects of exogenous auxin on the Arabidopsis thaliana root proteome at 8, 12, and 24 hours post-treatment.

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