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PHYTOREMEDIATION: ASSESSING TOLERANCE OF TREE SPECIES AGAINST HEAVY METAL (PB AND CD) TOXICITY

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dc.contributor.author SARWAT ISMAIL
dc.contributor.author KHAN, FARIHA
dc.contributor.author M. ZAFAR IQBAL
dc.date.accessioned 2023-01-05T07:40:24Z
dc.date.available 2023-01-05T07:40:24Z
dc.date.issued 2014-01-18
dc.identifier.citation Ismail, S., Khan, F. A. R. I. H. A., & Iqbal, M. Z. (2013). Phytoremediation: assessing tolerance of tree species against heavy metal (Pb and Cd) toxicity. Pakistan Journal of Botany, 45(6), 2181-2186. en_US
dc.identifier.issn 2070-3368
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/15685
dc.description.abstract The toxicity effects of heavy metals (lead and cadmium) on germination, root length and dry biomass of tree species viz., Thespesia populneoides, Leucaena leucocephala and Delonex regia were evaluated. Cadmium was found to be more toxic than lead. The results further showed that dose response of heavy metals were inversely proportional to germination, root growth and dry biomass. The percentage germination and higher % DFC values showed that the seeds of L. leucocephala were least affected by lead and cadmium toxicity while scoring the best germination response among the three tree species. Exposure to high concentration (125ppm) of Cd decreased the root size of L. leucocephala, T. populneoides and D. regia by 89.79, 71.8 and 62.26% respectively. However, at the same concentration, lead inhibited the root growth (39.62%) in case of D. regia while much higher reduction was observed for L. leucocephala and T. populneoides around 62.7%. Furthermore, the % phytotoxicity and tolerance index confirmed that D. regia appeared to be the most tolerant species whereas, T. populneoides and L. leucocephala were moderately tolerant and less tolerant species respectively against the Pb and Cd treatment. This study gives an insight to the possible mechanism of hypertolerance, signifying that trees can be successfully used for phytoremediation. en_US
dc.language.iso en en_US
dc.publisher Karachi: Pakistan Botanical Society en_US
dc.title PHYTOREMEDIATION: ASSESSING TOLERANCE OF TREE SPECIES AGAINST HEAVY METAL (PB AND CD) TOXICITY en_US
dc.type Article en_US


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