Molecular Genetics of Root Development in Plants
Summary
Plant roots are organised into distinct domains that coordinate nutrient uptake, anchorage and environmental sensing. Their development is orchestrated by a network of genes that regulate cell division, differentiation and patterning within the root apical meristem. In model species such as Arabidopsis thaliana and important crops including rice (Oryza sativa), key regulators have been identified: auxin biosynthesis enzymes (TAA1, YUC family), polar auxin transporters (PIN and AUX/LAX proteins), and downstream transcription factors such as auxin response factors (ARF7 and ARF19), Lateral Organ Boundaries Domain (LBD) proteins and WUSCHEL-RELATED HOMEOBOX (WOX) family members. Auxin gradients define sites of lateral root initiation and control root hair development, while cytokinin modulates meristem size and cell fates. Abscisic acid and ethylene integrate stress signals, adjusting root architecture in response to drought, salinity or flooding. Forward and reverse genetics, coupled with quantitative trait locus mapping, have revealed conserved modules that shape primary, lateral and crown root systems. Molecular genetic insights now underpin strategies to engineer root architectures that enhance water and nutrient foraging, confer tolerance to abiotic stress and improve crop yield stability across diverse environments.
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Molecular Genetics of Root Development in Plants publication trend
The graph below shows the total number of articles in molecular genetics of root development in plants across all publications each year (not limited to Nature Index journals).
Technical terms
Auxin: A plant hormone that regulates cell division and elongation, central to root patterning and lateral root initiation.
Root apical meristem (RAM): The zone at the tip of the root containing stem cells responsible for root growth.
Lateral root primordium (LRP): A group of founder cells that undergo organised divisions to form a lateral root.
Polar auxin transport: The directed movement of auxin across tissues, mediated by PIN and AUX/LAX transporters, establishing hormone gradients.
Transcription factor: A protein that binds DNA to regulate gene expression in developmental pathways.
References
- Rice transcription factor OsMADS25 modulates root growth and confers salinity tolerance via the ABA–mediated regulatory pathway and ROS scavenging. PLOS Genetics (2018).
- The YUCCA-Auxin-WOX11 Module Controls Crown Root Development in Rice. Frontiers in Plant Science (2018).
- Polar Auxin Transport Determines Adventitious Root Emergence and Growth in Rice. Frontiers in Plant Science (2019).
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