The Effect of Air Pollution on Diagnostic Elements and Mor Phological Charactes of Leves of Nerium oleander

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 .

Determination of some trace heavy metals in dust particles deposed on the leafs of some trees along Syrian coast

This study deals with the determination of the quantity of solid dust particles deposed on the leafs of some trees along Syrian coast and the concentration of some heavy metals in it (Zn, Fe, Pb, Cu, Ni, Cd, Co, Mn) .Some sites near to human and industrials activities , and others near to agriculture activities , and others relatively far from pollution sources has been selected. The results showed that the quantity of solid dust particles on leafs trees and concentration of heavy metals in it such as (Pb, Ni, Cd, Co) increasing near the industrials activities and dense traffic, and decreasing in the sites that relatively far from of pollution sources. However Cypress trees attach solid quantities more than Pride of china, following Rever red gum and Blue-leafed wattle and Oleander, and the Palm tree come in the last.

The effect of the polluted air which resulting of car stacks in morphology and chlorophyll concentration and the wools of leaves of Nerium oleander L.

The research was conducted to study the resistance of Nerium plant which are planting on sides of roads and the cities portals. The research was performed by studying the leaves of Nerium plant, through studying the length and weigh of the leaf, and its area and water content. In addition to studying the wools and hiatus and chlorophyll concentration, and compared the results between the polluted region which is the entry of Banias City, and the control one which is the gardens of Tishreen University. Results showed non significant reduction in length, weight and area of the leaf in the polluted region compared with the control one. It attained (16.2 cm, 0.97 g and 26.3 cm2), respectively in the polluted region. Where it was (17.8 cm, 1.25 g and 27.7 cm2), for control region, respectively. Also, there was no significant differences in water content between the two studied regions. It attained respectively (52.2 and 53.9 %). Our results showed: - That a number of hiatus decreased, whereas the wools increased in the polluted region compared with control region insignificantly. The mean of a number of it was 12 in polluted region, compared with 14 in the control region. - A simple insignificant reduction in the concentration of chlorophyll A in polluted region compared with the control, where it attained (0.93 and 0.98), respectively. The Nerium oleander plant was resistance and tolerance to the air pollution.