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You are here: Home » Latest Issue » Volume 15, 2020 - Number 1 » IMPACT ASSESSMENT OF HEAVY METALS POLLUTION IN THE AIR ON BACTERIAL MICROFLORA OF ELM TREES, Carpathian Journal of Earth and Environmental Sciences, February 2020, Vol. 15, No. 1, p. 87 - 92; DOI:10.26471/cjees/2020/015/111


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Nasrin SABOURMOGHADDAM*1 & Masoud SHAKERY2
1Department of Environmental and Natural Resources, Payame Noor University, Tehran, Iran
2Air Pollution Monitoring and Control Center, Department of Environment, Tabriz, Iran
*Corresponding author email: sabourmoghaddam@pnu.ac.ir, Nasrin.sabourmoghaddam@gmail.com


IMPACT ASSESSMENT OF HEAVY METALS POLLUTION IN THE AIR ON BACTERIAL MICROFLORA OF ELM TREES, Carpathian Journal of Earth and Environmental Sciences, February 2020, Vol. 15, No. 1, p. 87 - 92; DOI:10.26471/cjees/2020/015/111

Full text

Abstract:

Heavy metals are one of the most important environmental pollutants in all over the world. Heavy metals not only are seen in the soil and water but also can be found in the air. In recent years, the concentration of these metals has been increased in the atmosphere of many cities due to human activities. Examining the qualitative and quantitative changes of the endophyte microorganisms is one of the best markers to investigate the long-term impacts of these pollutants. This research was conducted in order to identify the effect of cadmium, lead and mercury on the population of the endophyte bacteria inside the elm trees in Tabriz. The plant samples including leaf and stem were collected during two years (2015-2016) in two different regions of the city randomly and their endophyte bacteria were isolated. One of the selected sampling site was the central region of the city with the highest pollution and the other one was marginal with less pollution in Tabriz. The experiments showed that there was a significant difference between the bacterial micro flora in these two regions. While, in the elm trees of the marginal region with less pollution the dominated bacteria were Gram negative bacteria, mostly from Pseudomonas genus, though in the polluted area, Gram positive bacteria, particularly Actinomyces and Bacillus were dominated.



Keyword: Air pollution, Bacteria, Cadmium, Lead, Mercury


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