دراسة تاثير تلوث الهواء الناتج عن عوادم السيارات في العناصر التشخيصية والصفات المورفولوجية لبنى الاوراق عند نبات الدفلة Nerium olender L.

This study has conducted to investigate the effect of air pollution on diagnostic elements and morphologicl characters of leaves of Neruim oleander Cultivated in roadsides in Lattakia City . Samples were collected from tow sites differ in pollution inteusity between october 2012 and september 2013 . The first site ( Al Jmhoria street in Lattakia city ) was more polluted and has more traffic activity . Whil the second site ( tishreen University park ) Was Less polluted and less traffic activity . The results have showed that the length , the weight and the colour of the leaf are negtively incieased because of traffic intensity and this , inturn , affects the shape , the size and the number of diagnostic elements which play animportant rule in differentation the species from each other .