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- The hormonal regulation of axillary bud growth in Arabidopsis
We have developed a new assay to study this phenomenon using the model plant Arabidopsis The assay allows study of the effects of both apical and basal hormone applications on the growth of buds on excised nodal sections
- Abscisic acid signaling is controlled by a - PNAS
Here we provide evidence that Arabidopsis BRC1 directly triggers an HD-ZIP–mediated cascade that results in a local boost of NCED3 expression and ABA biosynthesis inside axillary buds in conditions of low R:FR or short photoperiods ABA, along with BRC1 and HD-ZIP activity, may promote the induction of a GRN required for bud dormancy
- Transcriptomic analysis implicates ABA signaling and carbon supply in . . .
From our RNA-seq data, we found that not only ABA biosynthesis genes but also the ABA response genes were significantly upregulated in bud 2 compared with buds 6 and 7, suggesting that ABA levels might be lower in apical axillary buds
- ABA and Bud Dormancy in Perennials: Current Knowledge and Future . . . - MDPI
In autumn, short-term cold exposure increases endogenous ABA content in perennial buds by CBF, which binds and activates DAM SVL transcription, thus increasing ABA levels and inducing bud endodormancy [50,51]
- ABA signaling branches out: emerging ABA-related signaling functions in . . .
It also provides conclusive evidence about the role of ABA in potato axillary bud dormancy and develops genetic tools that will be invaluable for studying the role of ABA in tuberization In a classical approach, the authors first searched for the potato gene most closely related to the well-characterized Arabidopsis PP2C HAB1 gene, called StHAB1
- Light Regulation of Axillary Bud Outgrowth Along Plant Axes: An . . .
The mechanisms leading to changes in the ABA level involve BRC1 BRC1 induces ABA biosynthesis in buds, is up-regulated by low R:FR or following phyB mutation, and is involved in low R:FR-dependent branch suppression (Gonzalez-Grandio et al , 2013; Yuan et al , 2018)
- Transcriptomic analysis implicates ABA signaling and carbon supply in . . .
Our data indicated that limited P supply increased the transcript abundance of ABA-associated genes in apical axillary buds, suggesting the branching suppression effect of low P might be mediated partially through ABA level in the buds
- Identification of gene functions associated to active and dormant buds . . .
In a recent study, 7 Reddy et al quantified ABA levels in axillary buds with different growth capabilities (due either to their node position or to exposure to different light conditions) and confirmed that ABA abundance directly correlated with the degree of bud dormancy also in Arabidopsis
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