The m6A writer complex function in main stem apex development by promoting mRNA stability of GIF3, HDA6, and KNAT2/6 in Gossypium hirsutum
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View abstract on PubMed
Summary
This summary is machine-generated.N6-methyladenosine (m<sup>6</sup>A) writers in cotton regulate shoot apical meristem development. Silencing these writers reduces m<sup>6</sup>A levels, causing abnormal growth and dwarfism in plants.
Area Of Science
- Molecular Biology
- Plant Science
- Epigenetics
Background
- N6-methyladenosine (m<sup>6</sup>A) is a crucial RNA modification impacting mRNA metabolism.
- Understanding m<sup>6</sup>A regulation in cotton, particularly in the main stem apex (MSA), is limited.
- Key m<sup>6</sup>A 'writer' proteins catalyze this modification.
Purpose Of The Study
- Identify and characterize cotton m<sup>6</sup>A writer proteins.
- Investigate the role of m<sup>6</sup>A writers in cotton MSA development.
- Elucidate the molecular mechanisms underlying m<sup>6</sup>A-mediated regulation in cotton.
Main Methods
- Identification of cotton m<sup>6</sup>A writer genes (GhMTA, GhMTB, GhFIP37).
- Virus-induced gene silencing (VIGS) to knockdown writer gene expression.
- MeRIP-seq and RNA-seq to analyze m<sup>6</sup>A modification and transcriptomes.
- Analysis of plant phenotype, specifically MSA morphology and growth.
Main Results
- Cotton m<sup>6</sup>A writers (GhMTA-A/D, GhMTB-A/D, GhFIP37-A/D) were identified and localized to the nucleus.
- Knockdown of these writers decreased m<sup>6</sup>A levels in the MSA, leading to thicker shoot apical meristems, abnormal MSA, and dwarfism.
- m<sup>6</sup>A writers recognize GGACH/GAAGM motifs to modify specific mRNA transcripts (GhGIF3, GhHDA6, GhKNAT2/6).
- Modification of these transcripts affects their stability and regulates MSA development.
Conclusions
- Cotton m<sup>6</sup>A writers are essential for normal MSA development.
- A novel mechanism of m<sup>6</sup>A posttranscriptional regulation in cotton MSA is elucidated.
- These findings provide critical insights into m<sup>6</sup>A's role in plant growth and development.
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