Phyllotaxis and Rhizotaxis in Arabidopsis Are Modified by Three PLETHORA Transcription Factors

Hofhuis, Hugo; Laskowski, Marta; Du, Yujuan; Prasad, Kalika; Grigg, Stephen P.; Pinon, Violaine; Scheres, Ben

doi:10.1016/j.cub.2013.04.048

Cited by 103 publications

(112 citation statements)

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“…We employed laser scanning confocal microscope live imaging to monitor the expression pattern of all three PLTs during callus formation and shoot regeneration in wild-type. As reported earlier [16], we observed that all three PLTs were expressed at early stages of LRP initiation and in young leaves ( Fig. 1 A,K,U).…”

Section: Plt3 Plt5 and Plt7 Display Dynamic Expression Patterns Durisupporting

confidence: 89%

“…Our studies discover previously unrecognized critical roles of PLETHORA genes in establishing pluripotency and their absolute necessity for shoot regeneration. While PLT5 can induce de novo shoot assembly in a hormone-independent manner on the surface of pluripotent callus, it failed to induce shoots from lateral root primordia, as the function of PLT5 is to promote the outgrowth of LRP during normal development [16]. However, one cannot rule out the possibility that conversion of LRP to a shoot requires forced expression of other shoot-promoting factors.…”

Section: Discussionmentioning

confidence: 99%

“…To understand the mechanisms controlling the intermediate steps leading to shoot regeneration, mutants that are blocked at different developmental phases of shoot regeneration need to be examined. In a search for genes whose loss of function did not affect callus formation but blocked subsequent steps of de novo shoot regeneration, we considered genes that control lateral organ positioning in Arabidopsis [15,16]. The triple mutant plt3; plt5-2; plt7 displays normal shoot outgrowth in planta, but produces aberrant lateral root primordia.…”

Section: Plt3 Plt5 and Plt7 Display Dynamic Expression Patterns Durimentioning

confidence: 99%

“…These fusion proteins are able to complement the plt3; plt5-2; plt7 mutant phenotype and therefore are functional [16]. We employed laser scanning confocal microscope live imaging to monitor the expression pattern of all three PLTs during callus formation and shoot regeneration in wild-type.…”

Section: Plt3 Plt5 and Plt7 Display Dynamic Expression Patterns Durimentioning

confidence: 99%

“…Here, we show that plant-specific AP2-family transcription factors, PLETHORA3 (PLT3) PLT5 and PLT7 [15,16], establish the competence to regenerate shoot progenitor cells by inducing root stem cell regulators PLT1 and PLT2. Independently, PLT3, PLT5 and PLT7 regulate the shoot promoting factor CUC2 to permit the de novo shoot regeneration.…”

Section: Introductionmentioning

confidence: 99%

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PLETHORA Genes Control Regeneration by a Two-Step Mechanism

et al. 2015

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SummaryBackground-Regeneration, a remarkable example of developmental plasticity displayed by both plants and animals, involves successive developmental events driven in response to environmental cues. Despite decades of study on the ability of the plant tissues to regenerate complete fertile shoot system after inductive cues, the mechanisms by which cells acquire pluripotency and subsequently regenerate complete organs remain unknown.

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Section: Plt3 Plt5 and Plt7 Display Dynamic Expression Patterns Durisupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Plt3 Plt5 and Plt7 Display Dynamic Expression Patterns Durimentioning

confidence: 99%

Section: Plt3 Plt5 and Plt7 Display Dynamic Expression Patterns Durimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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PLETHORA Genes Control Regeneration by a Two-Step Mechanism

et al. 2015

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Lateral Root Formation: Building a Meristemde novo

Trinh¹,

Laplaze²,

Guyomarc’h³

2018

Annual Plant Reviews Online

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The complex and adaptable architecture of the plant root system in soil is of paramount importance for crop growth and performance. Root growth depends on the activity of the root apical meristem, an organized population of proliferating progenitor cells continuously replenished from a stem cell niche. Root branching, which greatly contributes to root system architecture in most dicot species, consists in de novo formation of new root meristems in existing root tissues. This phenomenon illustrates the ability of plants to repeatedly generate new tissues specialized in post-embryonic continuous growth and greatly impacts the elaboration of the root system architecture and its adaptation to environmental constraints. Here, we review the recent findings and models related to lateral root organogenesis in the dicot species Arabidopsis 2 thaliana, with emphasis on the mechanisms controlling de novo root meristem formation.Experimental evidence suggests that critical regulatory modules are common between embryonic and post-embryonic root meristem organogenesis, and that the lateral root formation molecular pathway is in part common with organ regeneration from callus.

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De novo assembly of plant body plan: a step ahead of Deadpool

et al. 2016

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While in the movie Deadpool it is possible for a human to recreate an arm from scratch, in reality plants can even surpass that. Not only can they regenerate lost parts, but also the whole plant body can be reborn from a few existing cells. Despite the decades old realization that plant cells possess the ability to regenerate a complete shoot and root system, it is only now that the underlying mechanisms are being unraveled. De novo plant regeneration involves the initiation of regenerative mass, acquisition of the pluripotent state, reconstitution of stem cells and assembly of regulatory interactions. Recent studies have furthered our understanding on the making of a complete plant system in the absence of embryonic positional cues. We review the recent studies probing the molecular mechanisms of de novo plant regeneration in response to external inductive cues and our current knowledge of direct reprogramming of root to shoot and vice versa. We further discuss how de novo regeneration can be exploited to meet the demands of green culture industries and to serve as a general model to address the fundamental questions of regeneration across the plant kingdom.

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Phyllotaxis and Rhizotaxis in Arabidopsis Are Modified by Three PLETHORA Transcription Factors

Abstract: Intriguingly PLT 3, PLT5, and PLT7 not only control the positioning of organs at the shoot meristem but also in the root; a striking observation that raises many evolutionary questions.

Cited by 103 publications

References 28 publications

PLETHORA Genes Control Regeneration by a Two-Step Mechanism

PLETHORA Genes Control Regeneration by a Two-Step Mechanism

Lateral Root Formation: Building a Meristemde novo

De novo assembly of plant body plan: a step ahead of Deadpool

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