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Lateral root formation and the multiple roles of auxin
- Source :
- Journal of Experimental Botany, 69(2), 155-167, Journal of Experimental Botany 69 (2018) 2
- Publication Year :
- 2018
-
Abstract
- Root systems can display variable architectures that contribute to survival strategies of plants. The model plant Arabidopsis thaliana possesses a tap root system, in which the primary root and lateral roots (LRs) are major architectural determinants. The phytohormone auxin fulfils multiple roles throughout LR development. In this review, we summarize recent advances in our understanding of four aspects of LR formation: (i) LR positioning, which determines the spatial distribution of lateral root primordia (LRP) and LRs along primary roots; (ii) LR initiation, encompassing the activation of nuclear migration in specified lateral root founder cells (LRFCs) up to the first asymmetric cell division; (iii) LR outgrowth, the 'primordium-intrinsic' patterning of de novo organ tissues and a meristem; and (iv) LR emergence, an interaction between LRP and overlaying tissues to allow passage through cell layers. We discuss how auxin signaling, embedded in a changing developmental context, plays important roles in all four phases. In addition, we discuss how rapid progress in gene network identification and analysis, modeling, and four-dimensional imaging techniques have led to an increasingly detailed understanding of the dynamic regulatory networks that control LR development.
- Subjects :
- 0301 basic medicine
Physiology
Arabidopsis
Plant Developmental Biology
Context (language use)
Plant Science
Genes, Plant
Plant Roots
lateral root
03 medical and health sciences
Plant Growth Regulators
Auxin
Asymmetric cell division
emergence
Laboratorium voor Moleculaire Biologie
Primordium
Gene Regulatory Networks
Lateral root formation
chemistry.chemical_classification
biology
Indoleacetic Acids
Lateral root
fungi
food and beverages
Meristem
oscillation
biology.organism_classification
founder cell specification
Cell biology
initiation
030104 developmental biology
chemistry
outgrowth
primordium
Laboratory of Molecular Biology
EPS
auxin
Subjects
Details
- Language :
- English
- ISSN :
- 00220957
- Database :
- OpenAIRE
- Journal :
- Journal of Experimental Botany, 69(2), 155-167, Journal of Experimental Botany 69 (2018) 2
- Accession number :
- edsair.doi.dedup.....bac44bab9454d6b350620e4d583b726b