BRANCHED1: A Key Hub of Shoot Branching

Wang, Ming; Moigne, Marie-Anne Le; Bertheloot, Jessica; Crespel, Laurent; Perez-Garcia, Maria Dolores; Ogé, Laurent; Demotes-Mainard, Sabine; Hamama, Latifa; Davière, Jean-Michel; Sakr, Soulaïman

doi:10.3389/fpls.2019.00076

Cited by 113 publications

(107 citation statements)

References 193 publications

(248 reference statements)

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“…Regulation of BRC1 (Branched 1) is the central hub for many shoot branching-related mechanisms and the expression of BRC1 is directly or indirectly regulated by phyB ( Figure 3) [55,56]. A. thaliana comprises two BRANCHED genes, BRC1 and BRC2, which encode TCP transcription factors and are closely related to TB1 (teosinte branched 1) in maize and FC1 (fine culm 1) in rice [57]. TB1 in maize, OsTB1/FC1 in rice, and SbTB1 in sorghum are known to promote bud arrest locally [57,58].…”

Section: Shoot-root Development and Branchingmentioning

confidence: 99%

“…A. thaliana comprises two BRANCHED genes, BRC1 and BRC2, which encode TCP transcription factors and are closely related to TB1 (teosinte branched 1) in maize and FC1 (fine culm 1) in rice [57]. TB1 in maize, OsTB1/FC1 in rice, and SbTB1 in sorghum are known to promote bud arrest locally [57,58]. It has been reported that active phyB suppressed SbTB1 and AtBRC1 in sorghum and Arabidopsis, respectively, leading to high branching, whereas inactive phyB (under low R:FR) increased these gene expressions and repressed branching [55,56].…”

Section: Shoot-root Development and Branchingmentioning

confidence: 99%

“…Auxin inhibits bud outgrowth through the promotion of systemic and local strigolactone (SL) synthesis by upregulating SL biosynthesis genes, MAXs (more axillary growth) in Arabidopsis. Furthermore, SL upregulates BRC1 expression and inhibits branching [57]. In parallel, auxin negatively regulates systemic and local cytokinin (CK) levels in the stem and buds.…”

Section: Shoot-root Development and Branchingmentioning

confidence: 99%

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Regulation of Photomorphogenic Development by Plant Phytochromes

Tripathi

Hoang

Han

et al. 2019

IJMS

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Photomorphogenesis and skotomorphogenesis are two key events that control plant development, from seed germination to flowering and senescence. A group of wavelength-specific photoreceptors, E3 ubiquitin ligases, and various transcription factors work together to regulate these two critical processes. Phytochromes are the main photoreceptors in plants for perceiving red/far-red light and transducing the light signals to downstream factors that regulate the gene expression network for photomorphogenic development. In this review, we highlight key developmental stages in the life cycle of plants and how phytochromes and other components in the phytochrome signaling pathway play roles in plant growth and development.

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Section: Shoot-root Development and Branchingmentioning

confidence: 99%

Section: Shoot-root Development and Branchingmentioning

confidence: 99%

Section: Shoot-root Development and Branchingmentioning

confidence: 99%

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Regulation of Photomorphogenic Development by Plant Phytochromes

Tripathi

Hoang

Han

et al. 2019

IJMS

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“…Conversely, the expression of strigolactone biosynthesis-related genes is rapidly repressed by auxin depletion in the stem, a behaviour that is also prevented by exogenous auxin application (Foo et al, 2005;Zou et al, 2006;Hayward et al, 2009). Cytokinins and strigolactones are partly integrated within the bud by the transcription factor BRC1, involved in bud dormancy in several species (Aguilar-Martinez et al, 2007;Dun et al, 2012;Rameau et al, 2015;Wang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Sugar availability suppresses the auxin‐induced strigolactone pathway to promote bud outgrowth

et al. 2019

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Summary Apical dominance occurs when the growing shoot tip inhibits the outgrowth of axillary buds. Apically‐derived auxin in the nodal stem indirectly inhibits bud outgrowth via cytokinins and strigolactones. Recently, sugar deprivation was found to contribute to this phenomenon. Using rose and pea, we investigated whether sugar availability interacts with auxin in bud outgrowth control, and the role of cytokinins and strigolactones, in vitro and in planta. We show that sucrose antagonises auxin’s effect on bud outgrowth, in a dose‐dependent and coupled manner. Sucrose also suppresses strigolactone inhibition of outgrowth and the rms3 strigolactone‐perception mutant is less affected by reducing sucrose supply. However, sucrose does not interfere with the regulation of cytokinin levels by auxin and stimulates outgrowth even with optimal cytokinin supply. These observations were assembled into a computational model in which sucrose represses bud response to strigolactones, largely independently of cytokinin levels. It quantitatively captures our observed dose‐dependent sucrose‐hormones effects on bud outgrowth and allows us to express outgrowth response to various combinations of auxin and sucrose levels as a simple quantitative law. This study places sugars in the bud outgrowth regulatory network and paves the way for a better understanding of branching plasticity in response to environmental and genotypic factors.

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“…On the other hand, the expression of strigolactone biosynthesis-related genes is rapidly repressed by auxin depletion in the stem, a behavior that is also prevented by exogenous auxin application (Foo et al , 2005; Zou et al , 2006; Hayward et al , 2009). Cytokinins and strigolactones are partly integrated within the bud by the transcription factor BRC1, involved in bud dormancy in several species (Aguilar-Martinez et al , 2007; Dun et al , 2012; Rameau et al , 2015; Wang et al , 2019).…”

Section: Introductionmentioning

confidence: 99%

Sugar availability suppresses the auxin-induced strigolactone pathway to promote bud outgrowth

Bertheloot

Barbier

Boudon

et al. 2019

Preprint

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+33 (0)2 41 22 56 32 2 SUMMARY• Apical dominance occurs when the growing shoot tip inhibits the outgrowth of axillary buds. Apically-derived auxin in the nodal stem indirectly inhibits bud outgrowth via cytokinins and strigolactones. Recently, sugar deprivation was found to contribute to this phenomenon.• Using rose and pea, we investigated whether sugar availability interacts with auxin in bud outgrowth control, and the role of cytokinins and strigolactones, in vitro and in planta.• We show that sucrose antagonizes auxin's effect on bud outgrowth, in a dosedependent and coupled manner. Sucrose also suppresses strigolactone-inhibition of outgrowth, and rms3 strigolactone-perception mutant is less affected by reducing sucrose supply; however, sucrose does not interfere with the regulation of cytokinin levels by auxin, and stimulates outgrowth even with optimal cytokinin supply. These observations were assembled into a computational model where sucrose represses bud response to strigolactones, largely independently of cytokinin levels. It quantitatively captures our observed dose-dependent sucrose-hormones effects on bud outgrowth, and allows us to express outgrowth response to various combinations of auxin and sucrose levels as a simple quantitative law.• This study places sugars in the bud outgrowth regulatory network, and paves the way for better understanding of branching plasticity in response to environmental and genotypic factors.Versailles, France) for providing the seeds of Pisum sativum and GR24. We thank the Environment and Agronomy department of INRA for financial support.

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BRANCHED1: A Key Hub of Shoot Branching

Cited by 113 publications

References 193 publications

Regulation of Photomorphogenic Development by Plant Phytochromes

Regulation of Photomorphogenic Development by Plant Phytochromes

Sugar availability suppresses the auxin‐induced strigolactone pathway to promote bud outgrowth

Sugar availability suppresses the auxin-induced strigolactone pathway to promote bud outgrowth

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