Conserved function of FLOWERING LOCUS T (FT) homologues as signals for storage organ differentiation

Navarro, Cristina; Cruz-Oró, Eduard; Prat, Salomé

doi:10.1016/j.pbi.2014.10.008

Cited by 78 publications

(60 citation statements)

References 63 publications

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“…GA suppresses the production of the DELLA protein (including GAI ; REPRESSOR OF GA1-3 , RGA1-3 ; RGA-LIKE1-3 , RGL1-3 ), which is antagonistic to GA signaling [16,17]. In addition, members of other transcription factor families, namely MYB, MADS, AP2/ERF, bHLH, WRKY and TCP, are also involved in floral induction and flowering [18,19,20,21,22]. For example, FLOWERING LOCUS C ( FLC ) transcription is regulated by the MADS box transcription factor SHORT VEGETATIVE PHASE ( SVP ), the product of which binds to the promoters of FT and SOC1 [3,23].…”

Section: Introductionmentioning

confidence: 99%

Gibberellic Acid Signaling Is Required to Induce Flowering of Chrysanthemums Grown under Both Short and Long Days

Dong

Deng

Wang

et al. 2017

IJMS

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Flower bud formation and flowering in chrysanthemums occur under short day conditions (SD), but the molecular basis for the switch to reproductive growth is less well understood than in model plants. Here, a spontaneous mutant able to flower under long days is described. In an attempt to reveal the pathway(s) involved in the formation of flower buds under contrasting daylengths, transcriptome sequencing was carried out in plants grown both under SD and long day conditions (LD). A number of differentially transcribed genes involved in the various known flowering pathways were identified. Both circadian clock genes and Chrysanthemum FLOWERING LOCUS T Like3 (CmFTL3) were up-regulated under SD, thereby inducing floral bud formation and flowering. The gibberellin (GA) signaling pathway-related genes Gibberellin 20-oxidase (GA20ox) and Gibberellin receptor (GID1) were up-regulated in the mutant under LD, while the catabolic genes Gibberellin 2-oxidase (GA2ox) and GA-INSENSITIVE (GAI) were down-regulated, thereby inducing the transcription of SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 (SOC1) and LEAFY (LFY). The GA content of the leaf was higher in the mutant than in the wild type (WT) under LD and SD, and the mutant has more branching than WT plants under LD or SD. When treated with GA, the mutant flowered earlier under both SD and LD relative to WT, but there was no detectable phenotype difference between the two lines. The indication was that the photoperiod pathway majorly regulates flower bud formation and flowering time in chrysanthemums under SD. The GA signaling pathway only plays a subsidiary role for flowering. However, the GA signaling pathway predominated for flowering under LD.

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Section: Introductionmentioning

confidence: 99%

Gibberellic Acid Signaling Is Required to Induce Flowering of Chrysanthemums Grown under Both Short and Long Days

Dong

Deng

Wang

et al. 2017

IJMS

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“…Interestingly, the dgt mutation delays the number of days to flowering in either SP or sp backgrounds (Balbi and Lomax, 2003), apparently by reducing the expression of SINGLE FLOWER TRUSS ( SFT ) gene, which encodes the florigen (Evans, 1971; Shalit et al, 2009). It does not, however, significantly affect the number of leaves produced before termination, which is a proven effect of SFT and its orthologs in tomato and other species (Kojima et al, 2002; Lifschitz and Eshed, 2006; Navarro et al, 2015). Hence, the loss-of-function sft mutant produced 130% more leaves on the primary shoot than the control MT (Vicente e al., 2015).…”

Section: Discussionmentioning

confidence: 94%

SELF-PRUNINGaffects auxin responses synergistically with the cyclophilin A DIAGEOTROPICA in tomato

Silva

Vicente

Moncaleano

et al. 2018

Preprint

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SummaryThe antiflorigenic signal SELF-PRUNING, which controls growth habit, exerts its effects through auxin transport, signaling and metabolism in tomato.AbstractThe SELF PRUNING (SP) gene is a key regulator of growth habit in tomato (Solanum lycopersicum). It is an ortholog of TERMINAL FLOWER 1, a phosphatidyl-ethanolamine binding protein with anti-florigenic activity in Arabidopsis thaliana. A spontaneous loss-of-function sp mutation has been bred into a large number of industrial tomato cultivars, as it produces a suite of pleiotropic effects that are favorable for mechanical harvesting, including determinate growth habit, short plant stature and simultaneous fruit ripening. However, the physiological basis for these phenotypic differences has not been thoroughly explained. Here, we show that the sp mutation alters polar auxin transport as well as auxin responses such gravitropic curvature and elongation of excised hypocotyl segments. We further demonstrate that free auxin levels and auxin-regulated gene expression patterns are altered in sp, with epistatic effects of diageotropica, a mutation in a cyclophilin A protein-encoding gene. Our results indicate that SP impacts growth habit in tomato, at least in part, via changes in auxin transport and responsiveness. These findings hint at novel targets that could be manipulated in the control of growth habit and productivity.

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“…Photoperiodic control on potato tuberization based on a coincidence model of light and StCOL1 expression (adapted from Navarro et al ). In long days, circadian clock proteins interact with a repressor of StCOL1 expression called StCDF1, which leads to its degradation.…”

Section: Introductionmentioning

confidence: 99%

“…A simplified model explaining the molecular control behind potato tuberization and the proposed coincidence model is described in Fig. 1 Navarro et al 2015). In long days, circadian clock proteins interact with a repressor of StCOL1 expression called StCDF1, which leads to its degradation.…”

Section: Introductionmentioning

confidence: 99%

Coincidence of potato CONSTANS (StCOL1) expression and light cannot explain night‐break repression of tuberization

Plantenga

Heuvelink

Rienstra

et al. 2018

Physiologia Plantarum

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In the obligate short‐day potato Solanum tuberosum group Andigena (Solanum andigena), short days, or actually long nights, induce tuberization. Applying a night break in the middle of this long night represses tuberization. However, it is not yet understood how this repression takes place. We suggest a coincidence model, similar to the model explaining photoperiodic flowering in Arabidopsis. We hypothesize that potato CONSTANS (StCOL1), expressed in the night of a short day, is stabilized by the light of the night break. This allows for StCOL1 to repress tuberization through induction of StSP5G, which represses the tuberization signal StSP6A. We grew S. andigena plants in short days, with night breaks applied at different time points during the dark period, either coinciding with StCOL1 expression or not. StCOL1 protein presence, StCOL1 expression and expression of downstream targets StSP5G and StSP6A were measured during a 24‐h time course. Our results show that a night break applied during peak StCOL1 expression is unable to delay tuberization, while coincidence with low or no StCOL1 expression leads to severely repressed tuberization. These results imply that coincidence between StCOL1 expression and light does not explain why a night break represses tuberization in short days. Furthermore, stable StCOL1 did not always induce StSP5G, and upregulated StSP5G did not always lead to fully repressed StSP6A. Our findings suggest there is a yet unknown level of control between StCOL1, StSP5G and StSP6A expression, which determines whether a plant tuberizes.

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Conserved function of FLOWERING LOCUS T (FT) homologues as signals for storage organ differentiation

Cited by 78 publications

References 63 publications

Gibberellic Acid Signaling Is Required to Induce Flowering of Chrysanthemums Grown under Both Short and Long Days

Gibberellic Acid Signaling Is Required to Induce Flowering of Chrysanthemums Grown under Both Short and Long Days

SELF-PRUNINGaffects auxin responses synergistically with the cyclophilin A DIAGEOTROPICA in tomato

Coincidence of potato CONSTANS (StCOL1) expression and light cannot explain night‐break repression of tuberization

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