ArticleScientific reports2016
Re-induction of the cell cycle in the Arabidopsis post-embryonic root meristem is ABA-insensitive, GA-dependent and repressed by KRP6.
Article in Scientific reports, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 21 citations in OpenAlex.
- Integrating meristem initiation and floral fate control: towardFrontiers in plant science · 2026Review
- Comparative regulatory network of transcripts behind radicle emergence and seedling stage of maize (Heliyon · 2024Article
- RNA-seq profiling of primary calli induced by different media and photoperiods forMolecular breeding : new strategies in plant improvement · 2022Article
- Article
- Plant casein kinases phosphorylate and destabilize a cyclin-dependent kinase inhibitor to promote cell division.Plant physiology · 2021Article
- Germination and the Early Stages of Seedling Development in Brachypodium distachyon.International journal of molecular sciences · 2018Article
- Cell cycle arrest in plants: what distinguishes quiescence, dormancy and differentiated G1?Annals of botany · 2017Review
- Genome-wide association study discovered genetic variation and candidate genes of fibre quality traits in Gossypium hirsutum L.Plant biotechnology journal · 2017Article
- The Transcription Factor ATHB5 Affects GA-Mediated Plasticity in Hypocotyl Cell Growth during Seed Germination.Plant physiology · 2017Article
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Authors and funding
6 authors at 2 institutions in 1 country.
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Abstract
Seeding establishment following seed germination requires activation of the root meristem for primary root growth. We investigated the hormonal and genetic regulation of root meristem activation during Arabidopsis seed germination. In optimal conditions, radicle cell divisions occur only after the completion of germination and require de novo GA synthesis. When the completion of germination is blocked by ABA, radicle elongation and cell divisions occurred in these non-germinating seeds. Conversely under GA-limiting conditions, ABA-insensitive mutants complete germination in the absence of radicle meristem activation and growth. Radicle meristem activation and extension can therefore occur independently of completion of the developmental transition of germination. The cell cycle regulator KRP6 partially represses GA-dependent activation of the cell cycle. Germination of krp6 mutant seeds occurs more rapidly, is slightly insensitive to ABA in dose-response assays, but also hypersensitive to the GA synthesis inhibitor PAC. These conflicting phenotypes suggest the cell cycle uncouples GA and ABA responses in germinating Arabidopsis seeds, and that KRP6 acts downstream of GA to inhibit mitotic cell cycle activation during germination.
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