Related Experiment Video
Updated: May 31, 2026

Lateral Root Inducible System in Arabidopsis and Maize
Published on: January 14, 2016
Molecular regulatory mechanism of root development
Yee Hung1, Xiaofeng Huang, Yang Chai
1Herman Ostrow School of Dentistry, University of Southern California, USA. yeehung@usc.edu
Transforming growth factor-beta (TGF-beta) signaling is crucial for tooth development. Eliminating Smad4, a key mediator, in mouse dental epithelium prevents root formation and causes crown defects, highlighting Smad4
Area of Science:
- Developmental Biology
- Molecular Biology
- Genetics
Background:
- Transforming growth factor-beta (TGF-beta) signaling plays a vital role in embryonic development, including tooth formation.
- The Smad4 protein acts as a common mediator in TGF-beta signaling pathways.
Purpose of the Study:
- To investigate the specific role of TGF-beta signaling, mediated by Smad4, in mouse tooth root development.
- To determine the consequences of Smad4 inactivation in epidermal-derived tissues on root formation.
Main Methods:
- Utilized a two-component genetic system for specific inactivation of Smad4 expression in epidermal-derived tissues of mice.
- Analyzed the effects of Smad4 elimination on tooth root and crown development.
Main Results:
- Complete lack of tooth root formation was observed when Smad4 expression was eliminated in the dental epithelium.
- Severe defects in tooth crown development were also noted in the absence of Smad4.
Conclusions:
- Smad4 is essential for proper tooth root development.
- TGF-beta signaling, mediated by Smad4 in the dental epithelium, is critical for both root formation and crown integrity.
More Related Videos
08:04Poplar Adventitious Roots Induced by Stem Canker Pathogens: An Experimental System for Studying Roots Biology and Light Response-Related Processes
Published on: October 11, 2024
09:27High Resolution Quantification of Crystalline Cellulose Accumulation in Arabidopsis Roots to Monitor Tissue-specific Cell Wall Modifications
Published on: May 10, 2016
Related Concept Videos
Cell Signaling in Plants
Morphogenesis
Gene Regulation During Sporulation
Primary and Secondary Growth in Roots and Shoots
Water and Mineral Acquisition
Meristems and Plant Growth