Adverse Effects of Automobiles Related Pb2+ Pollution on Photosynthetic Attributes and Water Relations of Roadside Vegetation. | [Pakistan Journal of Botany • 2018]

Author(s):

1. IJAZ AHMAD: Department of Botany, University of Agriculture,Faisalabad,Pakistan

2. MUMTAZ HUSSAIN: Department of Botany, University of Agriculture,Faisalabad,Pakistan

3. MANSOOR HAMEED: Department of Botany, University of Agriculture,Faisalabad,Pakistan

4. RASHID AHMAD: Department of Crop Physiology, University of Agriculture,Faisalabad,Pakistan

Abstract:

This research was designed for the phyto-monitoring of Pb2+ pollution emitted from automobiles running along Motorway (M-2) and G.T. road and its effects on photosynthetic attributes and water relations of selected plant species growing along these roads. The data were collected from specified sites at different time intervals during all four seasons of the year. The results revealed significantly (p<0.05) higher Pb2+ content plant leaves growing in the vicinity of roadside (0 m distance) as compared to plant leaves collected from 50 m distance (Control) along both roads (M-2 and G.T. road). The leaves of Nerium oleander (2.45 mg kg-1 dry wt.) collected from M-2 trapped the higher amount of Pb2+ (p<0.001) at Kalar Kahar in Summer and Calotropis procera (2.78 mg kg-1 dry wt.) had the highest (p<0.05) Pb2+ deposition at Bahyria Town during summer. Photosynthetic rate, transpiration rate and stomatal conductance decreased significantly (p<0.01) in plants along roadsides; whereas, inconsistent results in water use efficiency were perceived in plants at 0 m distance as compared to those collected from 50 m distance. These outcomes are important to identify the existence of roadside vehicular pollutants on plants and to its ecological hazards.

Page(s): 517-527

DOI: DOI not available

Published: Journal: Pakistan Journal of Botany, Volume: 50, Issue: 2, Year: 2018

Keywords:

Pb2+ pollution

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