PIF transcription factors link a neighbor threat cue to accelerated reproduction in Arabidopsis

Galvão, Vinícius Costa; Fiorucci, Anne-Sophie; Trevisan, Martine; Franco-Zorilla, José Manuel; Goyal, Anupama; Schmid‐Siegert, Emanuel; Solano, Roberto; Fankhauser, Christian

doi:10.1038/s41467-019-11882-7

Cited by 73 publications

(55 citation statements)

References 80 publications

(133 reference statements)

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“…Moreover, PIFs are under strong transcriptional control 72 . This allows PIF accumulation during the day, even when phytochromes are active 18,73 (Fig. 4c, right panel).…”

Section: Phytochrome Signaling Elicited Through Light-activated Intermentioning

confidence: 99%

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Molecular mechanisms underlying phytochrome-controlled morphogenesis in plants

2019

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Phytochromes are bilin-binding photosensory receptors which control development over a broad range of environmental conditions and throughout the whole plant life cycle. Light-induced conformational changes enable phytochromes to interact with signaling partners, in particular transcription factors or proteins that regulate them, resulting in large-scale transcriptional reprograming. Phytochromes also regulate promoter usage, mRNA splicing and translation through less defined routes. In this review we summarize our current understanding of plant phytochrome signaling, emphasizing recent work performed in Arabidopsis. We compare and contrast phytochrome responses and signaling mechanisms among land plants and highlight open questions in phytochrome research.

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“…Moreover, PIFs are under strong transcriptional control 72 . This allows PIF accumulation during the day, even when phytochromes are active 18,73 (Fig. 4c, right panel).…”

Section: Phytochrome Signaling Elicited Through Light-activated Intermentioning

confidence: 99%

“…The phytochrome-PIF regulon is an initial step underlying photoreceptor’s control of a wide array of physiological and developmental responses 18,19,41,58,65 (Figs. 3 and 4).…”

Section: Phytochrome Signaling Elicited Through Light-activated Intermentioning

confidence: 99%

Molecular mechanisms underlying phytochrome-controlled morphogenesis in plants

2019

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“…[ 84 ] Furthermore, a subset of PIF transcription factors, including PIF4, PIF5, and PIF7, act genetically downstream of PHYB and play a prominent role in low‐red‐/far‐red‐induced flowering through regulating FT and TSF expression. [ 86 ]…”

Section: Molecular Mechanisms Underlying the Regulation Of Ft And Tfl1mentioning

confidence: 99%

Regulation by FLOWERING LOCUS T and TERMINAL FLOWER 1 in Flowering Time and Plant Architecture

Xuan

Jiang

et al. 2021

Small Structures

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The conversion from vegetative to inflorescence shoot apical meristem is one of the key developmental switches in flowering plants. This transition is modulated by various environmental and endogenous stimuli and controlled by sophisticated regulatory networks. Regulation of flowering time and inflorescence architecture has a great impact on plant reproductive success and significantly influences plant biomass and fitness. FLOWERING LOCUS T (FT), a mobile protein identified as a major component of florigen, promotes the transition to flowering, whereas its homologous protein TERMINAL FLOWER 1 (TFL1) functions oppositely. Studies in various species reveal that FT and TFL1 play universal and multifaceted roles in a wide range of developmental processes in plants. Hence, modulations of FT/TFL1 and their regulatory pathways have a considerable impact on plant development and crop domestication. Herein, an overview of the molecular basis underlying the regulation of FT/TFL1 expression and modulation of their protein trafficking and the relevant mechanisms in flowering time control and meristem development is provided. Whenever applicable, their functional conservation and divergence in various plant species are also discussed.

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“…We also detected a significant PIF7-HA enrichment on the SMT3 but not the SMT2 promoter (Fig. S4B) in PIF7p::PIF7-HA (pif7-2) seedlings (Galvao et al, 2019). PIF7-HA binding to SMT3 and HFR1, the latter being used as a positive control, was also much lower than PIF4-HA binding (Fig.…”

Section: In Lrfr Pifs Induce Smt2 Expression In the Hypocotyl To Promote Growthmentioning

confidence: 80%

Reduced light access promotes hypocotyl growth via autophagy-mediated recycling

Ince

Fiorucci

Trevisan

et al. 2021

Preprint

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Plant growth ultimately depends on fixed carbon, thus the available light for photosynthesis. Due to canopy light absorption properties, vegetative shade combines reduced light and a low red to far-red ratio (LRFR). In shade-avoiding plants, these two conditions independently promote growth adaptations to enhance light access. However, how these conditions, differing in photosynthetically-available light, similarly promote growth remains unknown. Here, we show that Arabidopsis seedlings adjust metabolism according to light conditions to supply resources for hypocotyl growth enhancement. Transcriptome analyses indicate that reduced light induces starvation responses, suggesting a switch to a catabolic state to promote growth. Accordingly, reduced light promotes autophagy. In contrast, LRFR promotes anabolism including biosynthesis of plasma-membrane sterols downstream of PHYTOCHROME-INTERACTING FACTORs (PIFs) acting in hypocotyls. Furthermore, sterol biosynthesis and autophagy are indispensable for shade-induced hypocotyl growth. We conclude that vegetative shade enhances hypocotyl growth by combining autophagy-mediated recycling and promotion of specific anabolic processes.

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PIF transcription factors link a neighbor threat cue to accelerated reproduction in Arabidopsis

Cited by 73 publications

References 80 publications

Molecular mechanisms underlying phytochrome-controlled morphogenesis in plants

Molecular mechanisms underlying phytochrome-controlled morphogenesis in plants

Regulation by FLOWERING LOCUS T and TERMINAL FLOWER 1 in Flowering Time and Plant Architecture

Reduced light access promotes hypocotyl growth via autophagy-mediated recycling

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