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Updated: Apr 18, 2026

Lateral Root Inducible System in Arabidopsis and Maize
Published on: January 14, 2016
Auxins differentially regulate root system architecture and cell cycle protein levels in maize seedlings
Enrique Martínez-de la Cruz1, Elpidio García-Ramírez2, Jorge M Vázquez-Ramos2
1Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio A-1', Ciudad Universitaria Morelia, Morelia 58030, Michoacán, Mexico.
Maize root development involves primary, seminal, adventitious, brace, and lateral roots. Auxins like NAA and IBA promote root growth, while 2,4-D inhibits it, influencing key proteins.
Area of Science:
- Plant Biology
- Developmental Biology
- Molecular Biology
Background:
- Maize (Zea mays) root system architecture is crucial for nutrient and water absorption.
- Understanding early root development is essential for improving crop yield and stress tolerance.
Purpose of the Study:
- To characterize early post-embryonic root development in maize.
- To investigate the effects of four auxins (IAA, NAA, IBA, 2,4-D) on root architecture.
- To analyze auxin-induced changes in heat shock protein HSP101 and cell cycle proteins (CKS1, CYCA1, CDKA1).
Main Methods:
- Comparison of maize seedling growth in cotton beds versus liquid medium.
- Application of different auxins to assess their impact on root development.
- Quantitative analysis of root types (PR, SSR, CR, BR, LR).
- Measurement of HSP101, CKS1, CYCA1, and CDKA1 protein levels in root and leaf tissues.
Main Results:
- Maize seedlings exhibit sequential and simultaneous growth of multiple root types post-germination.
- Auxins influenced root architecture in a dose-dependent manner; NAA and IBA stimulated crown root formation, while 2,4-D inhibited growth.
- Auxins differentially affected HSP101, CKS1, CYCA1, and CDKA1 levels, with HSP101 showing auxin-inducible, root-specific expression.
Conclusions:
- Early maize root development follows a defined branching pattern.
- Auxins regulate maize root development, potentially by modulating HSP101 and cell cycle proteins.
- HSP101 emerges as a key player in auxin-mediated root growth regulation.
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