Molecular investigation of organ‐autonomous expression of Arabidopsis circadian oscillators DOI
Yue Li,

Lingbao Wang,

Yuan Li

et al.

Plant Cell & Environment, Journal Year: 2020, Volume and Issue: 43(6), P. 1501 - 1512

Published: Feb. 3, 2020

The circadian pacemaker in plants is a hierarchical multioscillator system that directs and maintains 24-hr oscillation required for organism homeostasis environmental fitness. Molecular clockwork within individual tissues organs acts cell autonomously, showing differences expression of core oscillators their target genes; there are functional dominance coupling the complex regulatory network. However, molecular characteristics organ-specific clocks still unknown. Here, we showed detached shoot root possess dynamic protein-protein interactions between clock components, periodicity exhibits difference. period length difference was not remarkable prr7-3 prr9-1 mutants. In addition, phase transition curve indicated respond differently to resetting cues ambient temperature. PRR9 PRR7 compensate 22°C 28°C shoot, root. rhythms or transcript accumulation no at but were observed summary, our results reveal specificity organ-autonomous critical roles mechanisms regulating temperature compensation aerial system.

Language: Английский

Light Perception: A Matter of Time DOI Creative Commons
Sabrina E. Sanchez,

Matías L. Rugnone,

Steve A. Kay

et al.

Molecular Plant, Journal Year: 2020, Volume and Issue: 13(3), P. 363 - 385

Published: Feb. 14, 2020

Language: Английский

Citations

103
MSH1-induced heritable enhanced growth vigor through grafting is associated with the RdDM pathway in plants DOI Creative Commons
Hardik Kundariya, Xiaodong Yang, Kyla J. Morton

et al.

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: Oct. 22, 2020

Abstract Plants transmit signals long distances, as evidenced in grafting experiments that create distinct rootstock-scion junctions. Noncoding small RNA is a signaling molecule graft transmissible, participating RNA-directed DNA methylation; but the meiotic transmissibility of graft-mediated epigenetic changes remains unclear. Here, we exploit MSH1 system Arabidopsis and tomato to introduce rootstock variation experiments. Introducing mutations dcl2 , dcl3 dcl4 msh1 disrupts siRNA production reveals RdDM targets methylation repatterning. Progeny from show enhanced growth vigor relative controls. This heritable enhancement-through-grafting phenotype RdDM-dependent, involving 1380 differentially methylated genes, many within auxin-related gene pathways. Growth associated with robust root progeny, auxin transport based on inhibitor assays. Large-scale field effects plant performance, over five generations, demonstrating agricultural potential variation.

Language: Английский

Citations

58
Abscisic Acid and Flowering Regulation: Many Targets, Different Places DOI Open Access
Damiano Martignago, Beata Siemiatkowska,

Alessandra Lombardi

et al.

International Journal of Molecular Sciences, Journal Year: 2020, Volume and Issue: 21(24), P. 9700 - 9700

Published: Dec. 18, 2020

Plants can react to drought stress by anticipating flowering, an adaptive strategy for plant survival in dry climates known as escape (DE). In Arabidopsis, the study of DE brought surface involvement abscisic acid (ABA) controlling floral transition. A central question concerns how and what spatial context ABA signals affect network. leaf, signaling affects flowering genes responsible production main florigen FLOWERING LOCUS T (FT). At shoot apex, FD FD-like transcription factors interact with FT FT-like proteins regulate responses. This knowledge will help separate general specific roles potential benefits both biology agriculture.

Language: Английский

Citations

54
GIGANTEA Shapes the Photoperiodic Rhythms of Thermomorphogenic Growth in Arabidopsis DOI Creative Commons
Young‐Joon Park, Jae Young Kim,

June-Hee Lee

et al.

Molecular Plant, Journal Year: 2020, Volume and Issue: 13(3), P. 459 - 470

Published: Jan. 16, 2020

Language: Английский

Citations

53
The Transcriptional Network in the Arabidopsis Circadian Clock System DOI Open Access
Norihito Nakamichi

Genes, Journal Year: 2020, Volume and Issue: 11(11), P. 1284 - 1284

Published: Oct. 29, 2020

The circadian clock is the biological timekeeping system that governs approximately 24-h rhythms of genetic, metabolic, physiological and behavioral processes in most organisms. This oscillation allows organisms to anticipate adapt day–night changes environment. Molecular studies have indicated a transcription–translation feedback loop (TTFL), consisting transcriptional repressors activators, essential for function Arabidopsis thaliana (Arabidopsis). Omics using next-generation sequencers further revealed transcription factors TTFL directly regulate key genes implicated clock-output pathways. In this review, target clock-associated are summarized. network partly conserved among angiosperms. addition, clock-dependent structure discussed context plant behaviors adapting cycles.

Language: Английский

Citations

52
GIGANTEA accelerates wheat heading time through gene interactions converging on FLOWERING LOCUS T1 DOI Creative Commons
Chengxia Li, Huiqiong Lin, Juan M. Debernardi

et al.

The Plant Journal, Journal Year: 2024, Volume and Issue: 118(2), P. 519 - 533

Published: Jan. 6, 2024

SUMMARY Precise regulation of flowering time is critical for cereal crops to synchronize reproductive development with optimum environmental conditions, thereby maximizing grain yield. The plant‐specific gene GIGANTEA ( GI ) plays an important role in the control time, additional functions on circadian clock and plant stress responses. In this study, we show that loss‐of‐function mutants a photoperiod‐sensitive tetraploid wheat background exhibit significant delays heading under both long‐day (LD) short‐day photoperiods, stronger effects LD. However, interaction between photoperiod no longer observed isogenic lines carrying either photoperiod‐insensitive allele PHOTOPERIOD1 PPD1 or EARLY FLOWERING 3 ELF3 ), known repressor . These results suggest normal required differential effect different photoperiods. Using crosses mutant transgenic plants those genes pathway, accelerates by promoting LOCUS T1 FT1 expression via interactions , VERNALIZATION 2 VRN2 CONSTANS CO age‐dependent microRNA172‐ APETALA2 AP2 at transcriptional protein levels. Our study reveals conserved mechanisms Arabidopsis but also identifies specific distinctive vernalization pathways temperate grasses. provide valuable knowledge modulating engineering new varieties better adapted changing environment.

Language: Английский

Citations

7
A warm temperature-released negative feedback loop fine-tunes PIF4-mediated thermomorphogenesis in Arabidopsis DOI Creative Commons
Hui Li, Mande Xue, Huairen Zhang

et al.

Plant Communications, Journal Year: 2024, Volume and Issue: 5(5), P. 100833 - 100833

Published: Feb. 7, 2024

Plants can sense temperature changes and adjust their growth accordingly. In Arabidopsis, high ambient temperatures stimulate stem elongation by activating a key thermoresponsive regulator, PHYTOCHROME INTERACTING FACTOR 4 (PIF4). Here, we show that warmth promotes the nighttime transcription of GI, which is necessary for temperature-induced TOC1. Genetic analyses suggest GI prevents excessive inhibiting PIF4, with this regulatory mechanism being partially reliant on repressed ELF3 HY5, concurrently inhibit PIF4 expression activity. Temperature elevation causes deactivation or degradation leading to activation relief transcriptional repression at temperatures. This allows further activate in response elevated turn, inhibits establishing negative feedback loop fine-tunes addition, demonstrate ELF3, regulate modulating enrichment histone variant H2A.Z locus. Together, our findings thermal release finely adjusts plant thermomorphogenesis.

Language: Английский

Citations

6
GIGANTEA gates gibberellin signaling through stabilization of the DELLA proteins in Arabidopsis DOI Creative Commons
María A. Nohales, Steve A. Kay

Proceedings of the National Academy of Sciences, Journal Year: 2019, Volume and Issue: 116(43), P. 21893 - 21899

Published: Oct. 9, 2019

Significance The circadian clock integrates environmental cues with internal biological processes to generate robust rhythms in almost all aspects of plant physiology. molecular mechanisms underlying the pervasive regulation physiology and development by are still being unraveled. Our study identifies protein GIGANTEA as a key regulator response gibberellins through pivotal factors signaling this hormone. Direct modulation hub components networks provides means which oscillator can effectively transduce timing information an extensive array physiological pathways.

Language: Английский

Citations

50
Pseudo Response Regulators Regulate Photoperiodic Hypocotyl Growth by Repressing PIF4/5 Transcription DOI Creative Commons
Na Li, Yuanyuan Zhang,

Yuqing He

et al.

PLANT PHYSIOLOGY, Journal Year: 2020, Volume and Issue: 183(2), P. 686 - 699

Published: March 12, 2020

The circadian clock measures and conveys daylength information to control rhythmic hypocotyl growth in photoperiodic conditions achieve optimal fitness, but it operates through largely unknown mechanisms. Here, we show that Pseudo Response Regulators (PRRs) coordinate with the Evening Complex (EC), a transcriptional repressor complex within core oscillator, specifically regulate Arabidopsis (Arabidopsis thaliana). Intriguingly, distinct could shift expression phase extend duration of PRRs. Multiple lines evidence have further demonstrated PRRs directly bind promoters PHYTOCHROME-INTERACTING FACTOR4 (PIF4) PIF5 repress their expression, hence act as repressors positive regulators PIF4 PIF5. Importantly, mutation or truncation TIMING OF CAB EXPRESSION1 (TOC1) DNA binding domain, without compromising its physical interaction PIFs, still caused long under short days, highlighting essential role PRR-PIF module growth. Finally, genetic analyses are epistatic regulation Collectively, propose that, upon perceiving information, cooperate EC transcription together posttranslational PIF activities, thus forming regulatory network mediate clock-regulated

Language: Английский

Citations

49
PHYTOCHROME‐INTERACTING FACTORS at the interface of light and temperature signalling DOI Creative Commons
Martin Balcerowicz

Physiologia Plantarum, Journal Year: 2020, Volume and Issue: 169(3), P. 347 - 356

Published: March 17, 2020

Plant development displays a remarkable degree of plasticity and continuously adjusts to the plant's surroundings, process that is triggered by perception environmental cues such as light temperature. Transcription factors PHYTOCHROME-INTERACTING FACTOR (PIF) family have long been established key negative regulators responses; within last decade, increasing evidence suggests they are also core components temperature signalling, multiple mechanisms which regulates activity these transcription discovered. It has become clear responses cannot be considered in isolation, but occur context of, influenced by, other signals. This review discusses recent advances understanding through affects PIF function how environment.

Language: Английский

Citations

47