Studies on the mesophyll tissue and xylem elements from major groups of indian pteridophytes with special emphasis on evolutionary significance

Abstract

For successful colonization on land pteridophytes developed true root, true stem and true leaves. They are invaded in different habitats like terrestrial, aquatic, scrambling, climbing, twinning, epiphytic, xerophytic, pyrophytic, pumicicolous, myrmecophylous and halophytic forms. For performing photosynthesis internal tissues differentiation in leaf was occurred with different environmental selection pressure and efficient conduction was also evolved in due course of time. My entire work is designed to investigate the mesophyll tissue differentiation and to revisit the tracheary elements present therein and the work is divided in two chapters, the objectives cover in each chapter is presented. newline newline