ORIGINAL_ARTICLE
Biomonitoring of Airborne Heavy Metals Pollution by Delonix regia (Boj. ex Hook.) Raf. in Greater Cairo, Egypt
Delonix regia leaves and bark samples were collected from ten sites along the main motorways from urban and industrial areas of the Greater Cairo (Egypt). Samples were analyzed for the following trace metals by using Inductively Coupled Plasma Mass Spectrometer: Pb, Co, Zn, Fe, Ni, Mn, Cu andAl. Concentrations of the trace metals in leaves were significantly higher (at p <0.05) than in bark and were either within or below the normal ranges. In all the polluted sites, Zn, Co and Ni were the most prevalent and enriched trace metals in the leaves. The Fe concentrations were the highest detected element in the bark in all sites. The ratios of Co, Zn, Ni and Pb concentrations in leaf to bark were high in comparison to the ratios of other metals. The spatial variability of trace metals was only significant (at p <0.05) for Co, Zn and Ni at high probability levels and hangs on the traffic and industrial burden in each site. Our results indicated that Delonix regia is an adequate biomonitor of heavy metals pollution in the Greater Cairo, Egypt.
https://taec.journals.ekb.eg/article_12274_8b65e9a6f63cb3a732238b3e8e5f447c.pdf
2011-12-01
1
15
10.21608/taec.2011.12274
Delonix regia
leaves
bark
heavy
Metal pollution
Biomonitoring
Greater Cairo
Emad
Farahat
emad23_1999@yahoo.com
1
Botany and Microbiology Department, Faculty of Science, He/wan University, Cairo, Egypt.
LEAD_AUTHOR
ORIGINAL_ARTICLE
Cvtolgenetic Effects of the Insecticide (Dralgo) and Herbicide (Fusilade) on the Cellular Characters of Vicia faba L.
Viciafaba L. plants were used to test the combined genotoxic effects of Fusilade (Herbicide) and Drago (Insecticide) and their interaction. Also, germination vigour, vegetative growth and biochemical parameters were used to test the combined physiological effects of two pesticides alone and in combination.To study the cytotoxic effects, the meristem cells in root tips of plant were treated with nine different concentrations (1, 5, 10, 50, 100, 500, 1000, 5000, 10000 ppm) at four different time (3, 6, 12, 24 hrs.). The concentrations of the two pesticides were tested on growth of seeds of ViciafabaL. compared with control where the mean root length of seeds was measured at different times between 24, 48 and 72hrs. Furthermore, after 72h, root degeneration occurred turning the root tips into black colour, which wasn't measurable. lethal concentration LC50% was decreased with the increase in time which caused an increase in percentage of mortality using Probit tables .All the above treatments of two pesticides alone and in combination have been shown to decrease the mitotic index . In the combined pesticides treatments, the decrease in (MI) wasn't like in the individual pesticide treatments which was less when compared with pesticides alone either herbicide or insecticide at the same concentration and duration. Increase the percentage of mutation frequency in each pesticide alone and the combined (Fus.-Dra.) after 6hrs of treatment whereas at the combined the relation was inversed when compared with control, indicating an antagonistic effect. Also, all treatments used have caused different kinds of mitotic abnormalities and chromosomal aberrations, which were generally as follow: C metaphase, chromosome disturbance, stickiness, breaks and fragments, laggard and bridges, multipolar and ring chromosome, micronuclei and binuclear cells. In addition the pesticides have been shown to decrease the protein and DNA and RNA contents below the control level.
https://taec.journals.ekb.eg/article_12275_baea4bc00906a0ebfb1b4dd69ae289a1.pdf
2011-12-01
17
59
10.21608/taec.2011.12275
Cellular characters
Cytogenetics
herbicide
insecticide
Vicia faba
Afaf
Shehata
1
Department of Botany and Microbiology, College of Science, King Saud University, P.0.Box 2455, Riyadh 11451, Saudi Arabia
LEAD_AUTHOR
Ekram
Al-Sanae
2
Department of Botany and Microbiology, College of Science, King Saud University, P.0.Box 2455, Riyadh 11451, Saudi Arabia
AUTHOR
Muna
Al Rumaih
3
Department of Botany and Microbiology, College of Science, King Saud University, P.0.Box 2455, Riyadh 11451, Saudi Arabia
AUTHOR