The Receptor-Like Kinases GSO1, GSO2, RPK1 and TOAD2 Mediate Arabidopsis Root Patterning and Growth

Persistent Link:
http://hdl.handle.net/10150/312738
Title:
The Receptor-Like Kinases GSO1, GSO2, RPK1 and TOAD2 Mediate Arabidopsis Root Patterning and Growth
Author:
Racolta, Adriana
Issue Date:
2013
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Embargo:
Release 07-Jan-2016
Abstract:
During Arabidopsis embryogenesis, cell-cell signaling plays an essential role in establishing an organized body plan centered around two major axes of development: apical-basal and radial. Two topics of great interest are how the layered structure is initiated and maintained during and after embryogenesis and how communication between layers is achieved to allow for coordinated development. Recent research involving Receptor-Like Kinases (RLKs) in plants suggests that their roles in integrating various signals are important in many aspects of development, including embryonic and post-embryonic patterning. The research presented here describes the roles of two pairs of RLKs with independent roles in two different signaling environments. The first RLK pair, GSO1 and GSO2, function in root development at the transition to photoautotrophic nutrition to integrate sugar signals and regulate root growth. GSO1 and GSO2 regulate root epidermal cell identity by controlling the pattern of cell division of stem cells. The second pair of RLKs, RPK1 and TOAD2, function to control root development by regulation of meristem proliferation and a coordinated response to signaling molecules of the CLE family. The response of wild-type roots to treatment with CLE peptides (A-type) is meristem growth arrest, resulting in short roots. toad2 mutants are insensitive to the effect of CLE peptides in reducing meristem size and TOAD2 also regulates RPK1 upon CLE stimulation. Although responding to different signals, the two pairs of RLK share a common output of regulating cell proliferation in and around the root meristem, especially in the epidermis of the root.
Type:
text; Electronic Dissertation
Keywords:
Receptor-Like Kinases; Root development; Molecular & Cellular Biology; Arabidopsis
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Molecular & Cellular Biology
Degree Grantor:
University of Arizona
Advisor:
Tax, Frans E.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titleThe Receptor-Like Kinases GSO1, GSO2, RPK1 and TOAD2 Mediate Arabidopsis Root Patterning and Growthen_US
dc.creatorRacolta, Adrianaen_US
dc.contributor.authorRacolta, Adrianaen_US
dc.date.issued2013-
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.releaseRelease 07-Jan-2016en_US
dc.description.abstractDuring Arabidopsis embryogenesis, cell-cell signaling plays an essential role in establishing an organized body plan centered around two major axes of development: apical-basal and radial. Two topics of great interest are how the layered structure is initiated and maintained during and after embryogenesis and how communication between layers is achieved to allow for coordinated development. Recent research involving Receptor-Like Kinases (RLKs) in plants suggests that their roles in integrating various signals are important in many aspects of development, including embryonic and post-embryonic patterning. The research presented here describes the roles of two pairs of RLKs with independent roles in two different signaling environments. The first RLK pair, GSO1 and GSO2, function in root development at the transition to photoautotrophic nutrition to integrate sugar signals and regulate root growth. GSO1 and GSO2 regulate root epidermal cell identity by controlling the pattern of cell division of stem cells. The second pair of RLKs, RPK1 and TOAD2, function to control root development by regulation of meristem proliferation and a coordinated response to signaling molecules of the CLE family. The response of wild-type roots to treatment with CLE peptides (A-type) is meristem growth arrest, resulting in short roots. toad2 mutants are insensitive to the effect of CLE peptides in reducing meristem size and TOAD2 also regulates RPK1 upon CLE stimulation. Although responding to different signals, the two pairs of RLK share a common output of regulating cell proliferation in and around the root meristem, especially in the epidermis of the root.en_US
dc.typetexten
dc.typeElectronic Dissertationen
dc.subjectReceptor-Like Kinasesen_US
dc.subjectRoot developmenten_US
dc.subjectMolecular & Cellular Biologyen_US
dc.subjectArabidopsisen_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineMolecular & Cellular Biologyen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorTax, Frans E.en_US
dc.contributor.committeememberFares, Hannaen_US
dc.contributor.committeememberSchumaker, Karenen_US
dc.contributor.committeememberZarnescu, Danielaen_US
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