Eichhornia crassipes or water hyacinth has been identified as promising candidate for bioremediation of metal contaminated aquifers due to its thick root system. Knowledge of its developmental plasticity and structural modifications in different eco-zones of Punjab, Pakistan is vital to effectively utilize it for the said purpose. For study of ultra-structural variations in E. crassipes, samples were collected from three different areas of Punjab, Pakistan and changes in root and leaf were investigated. E. crassipes from Head balloki exhibited higher root diameter, thicker epidermis, parenchyma and metaxylem as compared to Head sullemanki and Renala khurd sites The anatomical traits of leaves displayed higher mesophyll thickness and improved vascular system then other ecozones. While no significant differences were observed in stomatal area. Thus, E. crassipes plants from Head balloki area have established an ability for stress tolerance via adaptations in roots and leaf anatomical features as compared to other areas.  

Keywords: Eichhornia crassipes; Anatomical traits, Eco-zones