1. Introduction
  1.1 Background and significance
  1.2 Objectives of the study
2. Literature Review
  2.1 Plant pathogens: types and effects
  2.2 Carbon allocation in plants: processes and regulation
  2.3 Influence of plant pathogens on plant carbon allocation
3. Materials and Methods
  3.1 Plant selection and growth conditions
  3.2 Pathogen inoculation
  3.3 Stable isotope labeling techniques
  3.4 Analysis of carbon allocation patterns
4. Results
  4.1 Effects of fungal pathogens on plant carbon allocation
  4.2 Effects of bacterial pathogens on plant carbon allocation
  4.3 Effects of viral pathogens on plant carbon allocation
5. Discussion
  5.1 Mechanisms underlying pathogen-induced changes in carbon allocation
  5.2 Implications for plant health and productivity
  5.3 Potential strategies for mitigating pathogen-induced carbon allocation changes