Abscisic Acid Is a General Negative Regulator of Arabidopsis Axillary Bud Growth

Yao, Cheng; Finlayson, Scott A.

doi:10.1104/pp.15.00682

Cited by 149 publications

(175 citation statements)

References 102 publications

(142 reference statements)

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“…For example, two of the genes with highest gene expression changes during GPA are the AtDRM1 and AtDRM2 genes, considered markers for dormant axillary buds (Tatematsu et al, 2005;Rae et al, 2014). Furthermore, genes responding to ABA, which have recently been proposed to regulate axillary bud growth (Yao and Finlayson, 2015), are strongly up-regulated during GPA. Thus, GPA might rely on the same signaling and execution mechanisms that regulate axillary bud growth inhibition.…”

Section: Discussionmentioning

confidence: 99%

“…Genes that respond to ABA were very strongly induced, e.g. the HISTONE H1.3 gene, known to be highly ABA responsive (Fujita et al, 2005;Yao and Finlayson, 2015), was among the top differentially expressed genes in both contrasts. Indeed, using confocal scanning laser microscopy, we observed strong fluorescence differences in growing and arrested shoot apices in a previously described H1.3-GFP expression marker line (Fig.…”

Section: Gpa Is Associated With Responses To Stress and To Growth-inhmentioning

confidence: 99%

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Seed Production Affects Maternal Growth and Senescence in Arabidopsis

Wuest

Philipp²,

Guthörl³

et al. 2016

Plant Physiol.

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Correlative control (influence of one organ over another organ) of seeds over maternal growth is one of the most obvious phenotypic expressions of the trade-off between growth and reproduction. However, the underlying molecular mechanisms are largely unknown. Here, we characterize the physiological and molecular effects of correlative inhibition by seeds on Arabidopsis (Arabidopsis thaliana) inflorescences, i.e. global proliferative arrest (GPA) during which all maternal growth ceases upon the production of a given number of seeds. We observed transcriptional responses to growth-and branching-inhibitory hormones, and low mitotic activity in meristems upon GPA, but found that meristems retain their identity and proliferative potential. In shoot tissues, we detected the induction of stress-and senescence-related gene expression upon fruit production and GPA, and a drop in chlorophyll levels, suggestive of altered source-sink relationships between vegetative shoot and reproductive tissues. Levels of shoot reactive oxygen species, however, strongly decreased upon GPA, a phenomenon that is associated with bud dormancy in some perennials. Indeed, gene expression changes in arrested apical inflorescences after fruit removal resembled changes observed in axillary buds following release from apical dominance. This suggests that GPA represents a form of bud dormancy, and that dominance is gradually transferred from growing inflorescences to maturing seeds, allowing offspring control over maternal resources, simultaneously restricting offspring number. This would provide a mechanistic explanation for the constraint between offspring quality and quantity.

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Section: Discussionmentioning

confidence: 99%

Section: Gpa Is Associated With Responses To Stress and To Growth-inhmentioning

confidence: 99%

Seed Production Affects Maternal Growth and Senescence in Arabidopsis

Wuest

Philipp²,

Guthörl³

et al. 2016

Plant Physiol.

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“…The same study revealed a strong induction of abscisic acid (ABA)-specific marker genes in response to BRC1 (3), indicating that BRC1 enhances or maintains ABA signaling in buds. Indeed, ABA accumulation is required for bud growth suppression in wild-type plants: plants bearing mutations in genes involved in ABA synthesis [9-CIS-EPOXYCAROTENOID DIOXYGENASE3 (NCED3) and ABA DEFICIENT2 (ABA2)] display enhanced bud outgrowth (4,6). Furthermore, a meta-analysis of three transcriptomic studies of active vs. dormant buds revealed that a GRN of ABA-related genes is induced in dormant buds regardless the stimuli involved (7).…”

mentioning

confidence: 99%

Abscisic acid signaling is controlled by a BRANCHED1/HD-ZIP I cascade in Arabidopsis axillary buds

González-Grandío

Pajoro

Franco-Zorrilla

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

241

239

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Shoot-branching patterns determine key aspects of plant life and are important targets for crop breeding. However, we are still largely ignorant of the genetic networks controlling locally the most important decision during branch development: whether the axillary bud, or branch primordium, grows out to give a lateral shoot or remains dormant. Here we show that, inside the buds, the TEOSINTE BRANCHED1, CYCLOIDEA, PCF (TCP) transcription factor BRANCHED1 (BRC1) binds to and positively regulates the transcription of three related Homeodomain leucine zipper protein (HD-ZIP)-encoding genes: HOMEOBOX PROTEIN 21 (HB21), HOMEOBOX PROTEIN 40 (HB40), and HOMEOBOX PROTEIN 53 (HB53). These three genes, together with BRC1, enhance 9-CIS-EPOXICAROTENOID DIOXIGENASE 3 (NCED3) expression, lead to abscisic acid accumulation, and trigger hormone response, thus causing suppression of bud development. This TCP/HD-ZIP genetic module seems to be conserved in dicot and monocotyledonous species to prevent branching under light-limiting conditions.

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“…Moreover, axillary bud outgrowth seems to be controlled by a complex cross-talk between hormones, nutritional state of the plant and environment (Rameau et al 2015). Among the hormones known to play a key role in controlling axillary bud outgrowth (branching), auxin, strigolactone, and abscisic acid act as inhibitors of this process, while cytokinin and gibberellin promote it (Chatfield et al 2000;Cline 1994;Ferguson and Beveridge 2009;Gomez-Roldan et al 2008;Napoli et al 1999;Rameau 2010;Rameau and Pillot 2010;Reddy et al 2013;Roumeliotis et al 2012;Shimizu-Sato and Mori 2001;Yao and Finlayson 2015). Changes in the sink to source dynamics in the plant also play an important role in the activation of axillary bud outgrowth.…”

Section: What Is Known About Axillary Meristem Formation and Outgrowtmentioning

confidence: 99%

“…Auxin seems to interact with the hormone strigolactone to inhibit bud growth (Bennett and Leyser 2006;Brewer et al 2009;Liang et al 2010), while cytokinins directly activate outgrowth (Dun et al 2012;Shimizu-Sato and Mori 2001). Additionally, two other classical and antagonistic acting hormones, gibberellin and abscisic acid, involved in seed dormancy release and dormancy induction maintenance respectively, also seem to play a role in the control of axillary bud development and branching (Elfving et al 2011;Jiang et al 2009;Reddy et al 2013;Yao and Finlayson 2015;González-Grandío et al 2017). …”

Section: Introductionmentioning

confidence: 99%

Mechanisms of vegetative propagation in bulbs : a molecular approach

Moreno-Pachon

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Abscisic Acid Is a General Negative Regulator of Arabidopsis Axillary Bud Growth

Cited by 149 publications

References 102 publications

Seed Production Affects Maternal Growth and Senescence in Arabidopsis

Seed Production Affects Maternal Growth and Senescence in Arabidopsis

Abscisic acid signaling is controlled by a BRANCHED1/HD-ZIP I cascade in Arabidopsis axillary buds

Mechanisms of vegetative propagation in bulbs : a molecular approach

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