ABSTRACT
The prevailing environmental conditions may have an influence on the quantity, composition, and morphology of the leaf surfaces waxy coverings. The sub-samples thus obtained were gently rinsed in distilled water to get rid of foreign material adhered to the leaf surfaces. The species were selected and classified into high, medium, and low wax content species based on their total epicuticular wax content. The presence of epicuticular wax on the leaf surfaces enables in a decrease of the transpiration rates because of the solar radiation reflection and also has an influence on other processes as gas exchange, water stress, herbicide resistance. Leaves of many woody trees in Northeastern Mexico contain a waxy coating, commonly denoted as the epicuticular wax. In conclusion, it may be stated that from many researches it is clear that the presence of epicuticular wax on the leaf surface has a significant role in the physiological functions and adaptation of trees in an ecosystem.
