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Authors Ismail, S; Khan, F; Iqbal, MZ
Author Full Name Ismail, Sarwat; Khan, Fariha; Iqbal, M. Zafar
Title PHYTOREMEDIATION: ASSESSING TOLERANCE OF TREE SPECIES AGAINST HEAVY METAL (PB AND CD) TOXICITY
Source PAKISTAN JOURNAL OF BOTANY
Language English
Document Type Article
Keywords Plus EARLY SEEDLING GROWTH; PLANT-GROWTH; ALBIZIA-LEBBECK; GERMINATION; CADMIUM; LEAD; ACCUMULATION; PHYTOTOXICITY; CHROMIUM; COPPER
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.
Author Address [Ismail, Sarwat] Ctr Environm Studies, Karachi, Pakistan; [Khan, Fariha] Univ Arid Agr, Rawalpindi, Pakistan; [Iqbal, M. Zafar] Univ Karachi, Dept Bot, Karachi 32, Pakistan
Reprint Address Ismail, S (corresponding author), Ctr Environm Studies, PCSIR Labs Complex, Karachi, Pakistan.
E-mail Address sarwat_ismail@yahoo.com
ResearcherID Number Khan, Fariha/V-8742-2019
Times Cited 12
Total Times Cited Count (WoS, BCI, and CSCD) 14
Publisher PAKISTAN BOTANICAL SOC
Publisher City KARACHI
Publisher Address DEPT OF BOTANY UNIV KARACHI, 32 KARACHI, PAKISTAN
ISSN 0556-3321
29-Character Source Abbreviation PAK J BOT
ISO Source Abbreviation Pak. J. Bot.
Publication Date DEC
Year Published 2013
Volume 45
Issue 6
Beginning Page 2181
Ending Page 2186
Page Count 6
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number 297KP
Unique Article Identifier WOS:000330254600049
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