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Updated: Jul 17, 2026

Lateral Root Inducible System in Arabidopsis and Maize
Published on: January 14, 2016
Auxin-mediated lateral root formation in higher plants.
Hidehiro Fukaki1, Yoko Okushima, Masao Tasaka
1Graduate School of Biological Sciences, Nara Institute of Science and Technology, Ikoma, Nara, Japan.
Lateral root formation is crucial for plant architecture. Auxin hormone and its signaling pathways, involving auxin transport and transcriptional regulators, are key to initiating and developing lateral roots in plants.
Area of Science:
- Plant biology
- Developmental biology
- Genetics
Background:
- Lateral root (LR) formation is a vital organogenetic process in higher plants.
- LRs originate from the pericycle cells of parent roots in angiosperms.
- Auxin is a critical plant hormone regulating LR formation, but its precise molecular mechanisms are not fully understood.
Purpose of the Study:
- To provide an updated overview of the molecular mechanisms governing auxin-mediated lateral root formation.
- To highlight the roles of auxin transport and signaling in LR initiation and development.
- Focus on insights gained from molecular genetic studies in Arabidopsis.
Main Methods:
- Review of molecular genetic studies, particularly utilizing Arabidopsis mutants.
- Analysis of the roles of auxin influx and efflux transporters.
- Examination of auxin signaling pathways involving Aux/IAA and ARF transcriptional regulators.
Main Results:
- A balanced auxin transport system (influx and efflux) is essential for LR initiation and primordium development.
- Proper auxin signaling, mediated by Aux/IAA and ARF families, is necessary for successful LR formation.
- These molecular components are critical for the organogenetic process of LR formation.
Conclusions:
- Auxin's role in lateral root formation is complex, involving intricate transport and signaling mechanisms.
- Understanding these pathways in model organisms like Arabidopsis provides fundamental insights into plant root architecture.
- Further research into these molecular mechanisms is crucial for comprehending plant development.
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