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Literature DB >> 30125145

SCARECROW and SHORTROOT control the auxin/cytokinin balance necessary for embryonic stem cell niche specification.

Elena Salvi¹, Riccardo Di Mambro², Elena Pacifici¹, Raffaele Dello Ioio¹, Paolo Costantino^1,3, Laila Moubayidin^1,4, Sabrina Sabatini¹.

Abstract

The root apical meristem is established during embryogenesis, when its organizer, the quiescent center, is specified and the stem cell niche is positioned. The SCARECROW-SHORTROOT heterodimer is essential for quiescent center specification and maintenance. As continuous post-embryonic root growth relies upon the SCARECROW-mediated control of the cytokinin/auxin balance, we investigated the role of SCARECROW and SHORTROOT in controlling cytokinin signaling during embryonic quiescent center specification. We found that from embryogenesis onward both SCARECROW and SHORTROOT antagonize cytokinin signaling, thus repressing the expression of the auxin biosynthetic enzyme ANTRANILATHE SYNTHASE BETA 1. This mechanism prevents detrimental and premature high auxin levels in the QC allowing the establishment of a functional embryonic root pole.

Keywords: QC specification; SCARECROW; SHORTROOT; auxin; cytokinin; embryogenesis; stem cell niche

Mesh：

Substances：

Year: 2018 PMID： 30125145 PMCID： PMC6149437 DOI： 10.1080/15592324.2018.1507402

Source DB: PubMed Journal: Plant Signal Behav ISSN： 1559-2316

14 in total

1. An evolutionarily conserved mechanism delimiting SHR movement defines a single layer of endodermis in plants.

Authors: Hongchang Cui; Mitchell P Levesque; Teva Vernoux; Jee W Jung; Alice J Paquette; Kimberly L Gallagher; Jean Y Wang; Ikram Blilou; Ben Scheres; Philip N Benfey
Journal: Science Date: 2007-04-20 Impact factor: 47.728

2. In vivo FRET-FLIM reveals cell-type-specific protein interactions in Arabidopsis roots.

Authors: Yuchen Long; Yvonne Stahl; Stefanie Weidtkamp-Peters; Marten Postma; Wenkun Zhou; Joachim Goedhart; María-Isabel Sánchez-Pérez; Theodorus W J Gadella; Rüdiger Simon; Ben Scheres; Ikram Blilou
Journal: Nature Date: 2017-07-26 Impact factor: 49.962

3. The SHORT-ROOT gene controls radial patterning of the Arabidopsis root through radial signaling.

Authors: Y Helariutta; H Fukaki; J Wysocka-Diller; K Nakajima; J Jung; G Sena; M T Hauser; P N Benfey
Journal: Cell Date: 2000-05-26 Impact factor: 41.582

Review 4. Tissue and Organ Initiation in the Plant Embryo: A First Time for Everything.

Authors: Joakim Palovaara; Thijs de Zeeuw; Dolf Weijers
Journal: Annu Rev Cell Dev Biol Date: 2016-08-19 Impact factor: 13.827

5. Auxin regulates distal stem cell differentiation in Arabidopsis roots.

Authors: Zhaojun Ding; Jirí Friml
Journal: Proc Natl Acad Sci U S A Date: 2010-06-11 Impact factor: 11.205

6. A Link between ethylene and auxin uncovered by the characterization of two root-specific ethylene-insensitive mutants in Arabidopsis.

Authors: Anna N Stepanova; Joyce M Hoyt; Alexandra A Hamilton; Jose M Alonso
Journal: Plant Cell Date: 2005-06-24 Impact factor: 11.277

7. Spatial coordination between stem cell activity and cell differentiation in the root meristem.

Authors: Laila Moubayidin; Riccardo Di Mambro; Rosangela Sozzani; Elena Pacifici; Elena Salvi; Inez Terpstra; Dongping Bao; Anja van Dijken; Raffaele Dello Ioio; Serena Perilli; Karin Ljung; Philip N Benfey; Renze Heidstra; Paolo Costantino; Sabrina Sabatini
Journal: Dev Cell Date: 2013-08-26 Impact factor: 12.270

SCARECROW and SHORTROOT control the auxin/cytokinin balance necessary for embryonic stem cell niche specification.

1. An evolutionarily conserved mechanism delimiting SHR movement defines a single layer of endodermis in plants.

2. In vivo FRET-FLIM reveals cell-type-specific protein interactions in Arabidopsis roots.

3. The SHORT-ROOT gene controls radial patterning of the Arabidopsis root through radial signaling.

Review 4. Tissue and Organ Initiation in the Plant Embryo: A First Time for Everything.

5. Auxin regulates distal stem cell differentiation in Arabidopsis roots.

6. A Link between ethylene and auxin uncovered by the characterization of two root-specific ethylene-insensitive mutants in Arabidopsis.

7. Spatial coordination between stem cell activity and cell differentiation in the root meristem.

8. SCARECROW is involved in positioning the stem cell niche in the Arabidopsis root meristem.

9. Molecular analysis of SCARECROW function reveals a radial patterning mechanism common to root and shoot.

10. A SCARECROW-based regulatory circuit controls Arabidopsis thaliana meristem size from the root endodermis.

1. Characterisation of the ERF102 to ERF105 genes of Arabidopsis thaliana and their role in the response to cold stress.

Review 2. Patterning the Axes: A Lesson from the Root.