Author : H. Ali, Hassan.
journal of kerbala university,
Volume 4, Issue 2, Pages 110-116
A field experiment was conducted between March, 2005 and December 2007 to study the effects of different levels of crude oil ( 0.0 , 0.5 , 1.0 , 2.0 , 3.0 liter/ seedling ) on the growth of ( Casuarina equisetifolia ) under Baghdad district /Iraq environmental conditions. The results showed the adverse effects of crude oil on the plant growth. Seedlings of the experiment showed various symptoms of effects after exposing to crude oil pollution ranging from leaf paleness, yellowing, browning and drying to death depending on the level of crude oil used and period of exposure. These symptoms reflected interruption in the plant growth as a result of pollution effects on physiological processes carried out by plants. The plant growth was reduced significantly in low levels (0.5 and 1.0 liter/seedling) while the result with high levels was the death of 75% and 100% of seedlings polluted with 2.0 and 3.0 liter/seedling respectively. The present study approved that ( Casuarina equisetifolia ) could tolerate a specific levels of crude oil pollution, therefore it was suggested that this tree could be served as a plant bioremediation for soil polluted by crude oil.