Plant metagenome
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA552773 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR9645047_1.fastq.gz | Fastqsanger.gz | |||
| SRR9645047_2.fastq.gz | Fastqsanger.gz | |||
| SRR9645048_1.fastq.gz | Fastqsanger.gz | |||
| SRR9645048_2.fastq.gz | Fastqsanger.gz |
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Project description:Abscisic acid (ABA) regulates seed and bud dormancy. We show by forward and reverse genetic analysis that the tomato transcription factor SlZFP2 is required for release of bud and seed dormancy through negative regulation of ABA biosynthesis. We also demonstrated that ABA promotes growth and represses flowering in tomato both through transcriptional control on the florigen-encoding gene SINGLE FLOWER TRUSS (SFT) in tomato. To gain further insight on transcriptome changes by overexpresion of HA-SlZFP2, we sequenced two lines of p35S:HA-SlZFP2 in LA1589 background and their nontransgenic siblings on Illumina Hiseq2000 platform. Two homozygous transgenic lines 103 and 104 showing very similar phenotypes in flowering and branching were chosen for profiling gene expression via RNA sequencing. Their respective nontransgenic siblings were served as controls (103N and 104N).
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Project description:•Cutin and suberin are lipid polyesters deposited in specific apoplastic compartments. Their fundamental roles in plant biology include controlling the movement of gases, water and solutes, and conferring pathogen resistance. Both cutin and suberin have been shown to be present in the Arabidopsis seed coat where they regulate seed dormancy and longevity. •In this study, we use accelerated and natural aging seed assays, glutathione redox potential measures, optical and transmission electron microscopy and gas chromatography-mass spectrometry to demonstrate that increasing the accumulation of lipid polyesters in the seed coat is the mechanism by which the AtHB25 transcription factor regulates seed permeability and longevity. •Chromatin immunoprecipitation during seed maturation revealed that the lipid polyester biosynthetic gene LACS2 (long-chain acyl-CoA synthetase 2) is a direct AtHB25 binding target. Gene transfer of this transcription factor to wheat and tomato demonstrates the importance of apoplastic lipid polyesters for the maintenance of seed viability. •Our work establishes AtHB25 as a trans-species regulator of seed longevity and has identified the deposition of apoplastic lipid barriers as a key parameter to improve seed longevity in multiple plant species.
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