Root-derived GA12 contributes to temperature-induced shoot growth in Arabidopsis

Camut, Lucie; Regnault, Thomas; Sirlin-Josserand, Mathilde; Sakvarelidze-Achard, Lali; Carrera, Esther; Zumsteg, Julie; Heintz, Dimitri; Leonhardt, Nathalie; Lange, Maria João Pimenta; Lange, Theodor; Davière, Jean-Michel; Achard, Patrick

doi:10.1038/s41477-019-0568-8

Cited by 29 publications

(23 citation statements)

References 24 publications

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“…The DELLA proteins interact with and inhibit the activity of BZR1, ARF6, and PIF4 to regulate cell elongation (de Lucas et al, 2008;Feng et al, 2008;Bai et al, 2012;Oh et al, 2014). More recently, an interesting paper showed that root-to-shoot translocation of GA 12 confers shoot elongation in responses to warm temperatures in a DELLA-dependent manner (Camut et al, 2019). These findings suggest that increased GA levels cause the degradation of DELLA proteins, which in turn releases the inhibitory effects of DELLA on PIF4, BZR1, or ARF6, thereby regulating cell elongation under warm conditions.…”

Section: Pif4-mediated Phytohormone Pathways Regulate Plant Thermomorphogenesismentioning

confidence: 99%

Molecular Regulation of Plant Responses to Environmental Temperatures

2020

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Temperature is a key factor governing the growth and development, distribution, and seasonal behavior of plants. The entire plant life cycle is affected by environmental temperatures. Plants grow rapidly and exhibit specific changes in morphology under mild average temperature conditions, a response termed thermomorphogenesis. When exposed to chilling or moist chilling low temperatures, flowering or seed germination is accelerated in some plant species; these processes are known as vernalization and cold stratification, respectively. Interestingly, once many temperate plants are exposed to chilling temperatures for some time, they can acquire the ability to resist freezing stress, a process termed cold acclimation. In the face of global climate change, heat stress has emerged as a frequent challenge, which adversely affects plant growth and development. In this review, we summarize and discuss recent progress in dissecting the molecular mechanisms regulating plant thermomorphogenesis, vernalization, and responses to extreme temperatures. We also discuss the remaining issues that are crucial for understanding the interactions between plants and temperature.

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Section: Pif4-mediated Phytohormone Pathways Regulate Plant Thermomorphogenesismentioning

confidence: 99%

Molecular Regulation of Plant Responses to Environmental Temperatures

2020

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“…It is noteworthy that several studies suggest that precursors [28] and conjugates [19] can also be transported. The GA precursor GA 12 can move from the aerial organs to the root through the phloem and vice versa through the xylem [28], in order to modulate plant growth according to environmental temperature [32].…”

Section: Transportmentioning

confidence: 99%

Interactions of Gibberellins with Phytohormones and Their Role in Stress Responses

Castro-Camba¹,

Sánchez²,

Vidal³

et al. 2022

Horticulturae

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Gibberellins are amongst the main plant growth regulators. Discovered over a century ago, the interest in gibberellins research is growing due to their current and potential applications in crop production and their role in the responses to environmental stresses. In the present review, the current knowledge on gibberellins’ homeostasis and modes of action is outlined. Besides this, the complex interrelations between gibberellins and other plant growth regulators are also described, providing an intricate network of interactions that ultimately drives towards precise and specific gene expression. Thus, genes and proteins identified as being involved in gibberellin responses in model and non-model species are highlighted. Furthermore, the molecular mechanisms governing the gibberellins’ relation to stress responses are also depicted. This review aims to provide a comprehensive picture of the state-of-the-art of the current perceptions of the interactions of gibberellins with other phytohormones, and their responses to plant stresses, thus allowing for the identification of the specific mechanisms involved. This knowledge will help us to improve our understanding of gibberellins’ biology, and might help increase the biotechnological toolbox needed to refine plant resilience, particularly under a climate change scenario.

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“…5). Among these 14 genes, GIBBERELLIN 20-OXIDASE 2 ( GA20ox2 ) encodes an enzyme that is involved in GA biosynthesis and temperature responses [ 42 ], and the basic helix-loop-helix transcription factor gene BASIC HELIX-LOOP-HELIX 87 ( bHLH87 ) was reported as a PIF4 downstream target in Arabidopsis [ 43 ]. GA20ox2 and bHLH87 were upregulated by elevated temperature in wild-type Col, but were inefficiently induced in ref6-5 mutants with high levels of H3K27me3 (Fig.…”

Section: Resultsmentioning

confidence: 99%

The histone H3K27 demethylase REF6/JMJ12 promotes thermomorphogenesis in Arabidopsis

Mei

Zhu

et al. 2021

National Science Review

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Dynamic trimethylation of histone H3 at Lys27 (H3K27me3) affects gene expression and controls plant development and environmental responses. In Arabidopsis thaliana, RELATIVE OF EARLY FLOWERING 6/JUMONJI DOMAIN-CONTAINING PROTEIN 12 (REF6/JMJ12) demethylates H3K27me3 by recognizing a specific DNA motif; however, little is known about how REF6 activates target gene expression after recognition, especially in environmental responses. In response to warm ambient temperature, plants undergo thermomorphogenesis, which involves accelerated growth, early flowering, and changes in morphology. Here we show that REF6 regulates thermomorphogenesis and cooperates with the transcription factor PHYTOCHROME INTERACTING FACTOR 4 (PIF4) to synergistically activate thermo-responsive genes under warm ambient temperature. The ref6 loss-of-function mutants exhibited attenuated hypocotyl elongation at warm temperature, partially due to down-regulation of GIBBERELLIN 20-OXIDASE2 (GA20ox2) and BASIC HELIX-LOOP-HELIX 87 (bHLH87). REF6 enzymatic activity is necessary for warm ambient temperature responses. Together, our results provide direct evidence of an epigenetic modifier and a transcription factor working together to respond to the environment.

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Root-derived GA12 contributes to temperature-induced shoot growth in Arabidopsis

Cited by 29 publications

References 24 publications

Molecular Regulation of Plant Responses to Environmental Temperatures

Molecular Regulation of Plant Responses to Environmental Temperatures

Interactions of Gibberellins with Phytohormones and Their Role in Stress Responses

The histone H3K27 demethylase REF6/JMJ12 promotes thermomorphogenesis in Arabidopsis

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