دراسة تشريحية مقارنة لبشرة أوراق النوعين Launeae mucronata و babylonica Picris من العائلة النجمية Asteraceae في مدينة تكريت العراق

Abstract EN

This study included the anatomical characteristics of the leaves of two species launeae mucronata l.

and picris babylonica l.

belong to asteraceae family.

the study included the dimensions of epidermal cells, stomata and surface covering, as well as qualitative characteristics such as the shapes and thickness of epidermal cells, which also had a great taxonomic value in distinguishing between the two types, as it was noted that the average number of stomata of the upper and lower epidermis between the two studied species.

a non glandular trichomes with hook-shaped ends were observed on the upper and lower epidermis of picris Babylonia and multicellular non glandular trichomes with rounded ends longer than the first one, while the upper and lower epidermis in launeae mucronata is devoid of trichomes.

it is worth noting that the frequency of stomata and trichomes was estimated in each microscope field under the power of magnification 40x (the number of stomata and trichomes in each microscope field) and stomatal index was found for tow studied species.