1. Introduction
  1.1 Background
  1.2 Research Objectives
2. Literature Review
  2.1 Plant Growth Regulators and Root Development
  2.2 Role of Auxins in Root Architecture
  2.3 Role of Cytokinins in Root Architecture
  2.4 Role of Gibberellins in Root Architecture
  2.5 Role of Abscisic Acid in Root Architecture
3. Methodology
  3.1 Selection of Plant Species and Growth Regulators
  3.2 Experimental Design and Treatments
  3.3 Root Phenotyping and Data Collection
  3.4 Statistical Analysis
4. Results
  4.1 Effects of Auxins on Root Architecture
  4.2 Effects of Cytokinins on Root Architecture
  4.3 Effects of Gibberellins on Root Architecture
  4.4 Effects of Abscisic Acid on Root Architecture
5. Discussion
  5.1 Implications of Growth Regulator-Induced Changes in Root Architecture
  5.2 Molecular Mechanisms of Growth Regulator-Mediated Root Development
  5.3 Potential Applications for Improving Plant Nutrient Uptake and Stress Tolerance