New insights into gibberellin signaling in regulating flowering in <i>Arabidopsis</i>

Bao, Shengjie; Hua, Changmei; Shen, Lisha; Yu, Hao

doi:10.1111/jipb.12892

Cited by 246 publications

(176 citation statements)

References 136 publications

(186 reference statements)

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“…The floral transition is a critical developmental phase for reproductive success and is tightly controlled by a complex genetic network in response to various environmental and developmental signals (Andres and Coupland 2012;Song et al 2013;Bao et al 2020). The flowering signals from these multiple genetic pathways ultimately converge on the regulation of floral pathway integrators, FLOWERING LOCUS T (FT), SUP-PRESSOR OF OVEREXPRESSION OF CONSTANS1 (SOC1), and LEAFY (LFY; Kardailsky et al 1999;Blazquez and Weigel 2000), which in turn activate downstream floral meristem identity genes, including LFY and APETALA1 (AP1), to initiate the generation of floral meristems (Blazquez and Weigel 2000).…”

Section: Introductionmentioning

confidence: 99%

Florigen trafficking integrates photoperiod and temperature signals in Arabidopsis

Liu

2020

JIPB

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The transition to flowering is the most dramatic phase change in flowering plants and is crucial for reproductive success. A complex regulatory network in plants has evolved to perceive and integrate the endogenous and environmental signals. These signals perceived, including day length and temperature, converge to regulate FLOWERING LOCUS T (FT), which encodes a mobile stimulus required for floral induction in Arabidopsis. Despite the discovery of modulation of FT messenger RNA (mRNA) expression by ambient temperature, whether the trafficking of FT protein is controlled in response to changes in growth temperature is so far unknown. Here, we show that FT transport from companion cells to sieve elements is controlled in a temperature‐dependent manner. This process is mediated by multiple C2 domain and transmembrane region proteins (MCTPs) and a soluble N‐ethylmaleimide‐sensitive factor protein attachment protein receptor (SNARE). Our findings suggest that ambient temperatures regulate both FT mRNA expression and FT protein trafficking to prevent precocious flowering at low temperatures and ensure plant reproductive success under favorable environmental conditions.

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Section: Introductionmentioning

confidence: 99%

Florigen trafficking integrates photoperiod and temperature signals in Arabidopsis

Liu

2020

JIPB

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“…Gibberellin signalling in Arabidopsis is regulated via its ability to mediate the degradation of DELLA proteins, a family of growth inhibitors. The degradation of DELLAs de-represses the DELLA interacting proteins which in turn positively regulate growth (Bao et al 2020; Davière and Achard, 2016). Most of the available literature on DELLAs is based on work in the L er -background.…”

Section: Resultsmentioning

confidence: 99%

Arabidopsis O-fucosyltransferase SPINDLY regulates root hair patterning independently of gibberellin signalling

Mutanwad

Zangl

Lucyshyn

2020

Preprint

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11Root hairs are able to sense soil composition and play an important role for water and nutrient uptake. 12In Arabidopsis thaliana, root hairs are distributed in the epidermis in a specific pattern, regularly 13 alternating with non-root hair cells in continuous cell files. This patterning is regulated by internal 14 factors such as a number of hormones, as well as external factors like nutrient availability. Thus, root-15 hair patterning is an excellent model for studying the plasticity of cell fate determination in response 16 to environmental changes. Here, we report that loss-of-function mutants in the Protein O-17 Fucosyltransferase SPINDLY (SPY) form ectopic root hairs. Using a number of transcriptional reporters, 18we show that patterning in spy-22 is affected upstream of the central regulators GLABRA2 (GL2) and 19 WEREWOLF (WER). O-fucosylation of nuclear and cytosolic proteins is an important post-translational 20 modification that is still not very well understood. So far, SPY is best characterized for its role in 21 gibberellin signalling via fucosylation of the growth-repressing DELLA protein REPRESSOR OF GA 22 (RGA). Our data suggest that the formation of ectopic root hairs in spy-22 is independent of RGA and 23 gibberellin signalling. 24

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“…According to the above functional classi cations and WGCNA of these DEGs, and owering-related genes previously reported in model plants (such as A. thaliana) [5,7], a total of 146 unigenes were identi ed as homologous genes related to oral transition in L. gratissima, involving several owering pathways: sugar metabolism, hormone metabolism and signal transduction, photoperiod, ambient temperature, aging pathways, as well as oral integrator and oral meristem identity genes. Among these oral transition-related homologous genes, stage-speci c DEGs, and common DEGs in LD7-vs.-SD7, LD10-vs.-SD10, LD13-vs.-SD13, and LD19-vs.-SD19 are listed in Additional le 13: Table S7.…”

Section: Identi Cation Of Deg Expression Patterns Associated With Oramentioning

confidence: 99%

“…Many studies have demonstrated that various phytohormones participate in the regulation of oral transition [7,[14][15][16]. A total of 20 (13.70%) DEGs associated with phytohormone metabolism were identi ed, and these involved 16 phytohormone metabolism homologous genes and were related to nine phytohormone metabolism pathways.…”

Section: The Expression Patterns Of Phytohormone Metabolism and Signamentioning

confidence: 99%

“…There are signi cant differences in the molecular mechanisms of oral transition in perennial woody plants compared with those of A. thaliana. For example, gibberellin (GA) promotes the transition from vegetative to reproductive development in A. thaliana but has inhibitory effects in some perennial woody plants [7][8][9]. Therefore, it is particularly important to study the molecular mechanisms of oral transition in perennial woody plants.…”

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confidence: 99%

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Morphological, Physiological, and Molecular Responses of Sweetly Fragrant Luculia Gratissima During the Floral Transition Stage Induced by Short-day Photoperiod

Liu

Wan

et al. 2020

Preprint

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Background: Photoperiod-regulated floral transition is vital to the flowering plant. Luculia gratissima ‘Xiangfei’ is a flowering ornamental plant with high development potential and is a short-day woody perennial. However, the genetic regulation of short-day-induced floral transition in L. gratissima is unclear. To systematically research the responses of L. gratissima during this process, dynamic changes in morphology, physiology, and transcript levels were observed and identified in different developmental stages of long-day and short-day-treated shoot apexes. Results: The results showed that floral transition in L. gratissima occurred 10 d after short-day induction, but flower bud differentiation did not occur under long-day conditions. A total of 1,226 differentially expressed genes were identified, of which 146 genes were associated with flowering pathways of sugar, phytohormones, photoperiod, ambient temperature, and aging signals, as well as floral integrator and meristem identity genes. The trehalose-6-phosphate signal positively modulated floral transition by interacting with SPL4 in the aging pathway. Endogenous gibberellin, abscisic acid, cytokinin, and jasmonic acid promoted floral transition, whereas strigolactone inhibited it. In the photoperiod pathway, FD, COL12, and NF-Ys positively controlled floral transition, whereas PRR7, FKF1, and LUX negatively regulated it. SPL4 and pEARLI1 positively affected floral transition. SOC1 and AGL24 integrated multiple flowering signals to modulate the expression of FUL/AGL8, AP1, LFY, SEPs, SVP, and TFL1, thereby regulating floral transition. Finally, we propose a regulatory network model for short-day-induced floral transition in L. gratissima. Conclusions: Short-day photoperiod activated systemic responses of morphology, physiology, and transcript levels in L. gratissima and induced the generation of floral transition signals in the photoperiod pathway. Furthermore, multiple flowering signal pathways including phytohormone-, sugar-, temperature-, age-related genes synergistically control this process. This study improves our understanding of flowering time regulation in L. gratissima and provides knowledge for its production and commercialization.

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New insights into gibberellin signaling in regulating flowering in Arabidopsis

Cited by 246 publications

References 136 publications

Florigen trafficking integrates photoperiod and temperature signals in Arabidopsis

Florigen trafficking integrates photoperiod and temperature signals in Arabidopsis

Arabidopsis O-fucosyltransferase SPINDLY regulates root hair patterning independently of gibberellin signalling

Morphological, Physiological, and Molecular Responses of Sweetly Fragrant Luculia Gratissima During the Floral Transition Stage Induced by Short-day Photoperiod

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