The role of stomata and its importance in resistance of Acasia synophyla trees to gas air pollutants

The present research was conducted to study the resistance of Acasia tree which were near to Banias- Jableh freeway. This study was performed by study the stomata and its distribution on the upper and down leaf surfaces. Also, a concentration of chlorophyll and a severity of photosynthesis, then compared the results between the polluted region with the control one. Results showed that a number of stomata decreased in polluted region compared to the control one, where this reduction play a role in reduce the injury resulting from gas air pollutants, and this reflexes on the severity of photosynthesis and the chlorophyll.

The role of some trees leaves in the detention of marine aerosols at the Syrian coast

In this study, the quantity of deposited particles on some trees leaves at Syrian coast has been determined; and the seasonal changes in the concentration of trace metals (Zn,Mn,Cd,Pb) at both sides corresponding to the land and sea have been identified.

The Accumulative Capacity of three plant species ( Eucaleptus camaldulensis L., Acacia cyanophylla L. and Ricinus communis L.) to cadmium

This study aims to compare the ability of three plant species (Eucaleptus camaldulensis L., Acacia cyanophylla L. and Ricinus communis L.) on the accumulation of cadmium (Cd) resulting from the different existing pollution sources in the study area (Abdul Qader Al Husseini Street - Latakia) especially resulting from traffic. The samples were collected from different parts (leaves, wood, bark) of the species mentioned in addition to samples of the soil, then the samples were processed and analyzed by atomic absorption spectrophotometer. The results showed a difference in the content of cadmium in the studied species, ranged between (0.25 mg/kg) and (0.42 mg/kg) dry weight, where the highest content in Ricinus wood (0.42 mg/kg) and then Eucalyptus wood (0.4 mg/kg) and minimum content in Acacia wood (0.32mg/kg). Ricinus and Acacia showed high ability to accumulate cadmium reaching Bioconcentration factor (BF=1.33) for Ricinus and (BF=1.13) for Acacia

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.