Yusra ZIA
Department of Botany, University of Karachi, Karachi – Pakistan
Muhammad Zafar IQBAL
Department of Botany, University of Karachi, Karachi – Pakistan
Muhammad SHAFIQ 
Department of Botany, University of Karachi, Karachi – Pakistan
https://doi.org/10.47743/jpd.2022.29.1.881
Keywords: bean crops, growth, motor workshop,
phytotoxicity assay, pH, soil.
Abstract: The waste water generation from the
automobile motor workshop activities are responsible for environmental
degradation in the form of water pollution and showed variable
impact on plant growth. This paper gives information, assessment
and screening about the effect of motor work shop waste water
on seedling growth of two different types of legume bean crops
namely, kidney bean (Phaseolus vulgaris L.) and mung
bean (Vigna radiata (L.) R. Wilkczek) in pot culture
experiments. The results showed that the increase in treatment
of 25%, 50%, 75%, and 100% of motor workshop waste water decreased
the root, seedling length, number of leaflets, shoot, leaves dry
weight and root/shoot ratio of common bean as compared to control.
The waste water treatment of 25% significantly (p<0.05) decreased
root growth performance and leaves dry weight of common bean as
compared to control. The treatment of polluted water produced
beneficial and harmful effects on root, shoot length, seedling
size, number of leaves, leaf area and biomass production of mung
bean. The treatment of waste water at 25% significantly (p<0.05)
decreased shoot length, leaf area, shoot dry weight, specific
leaf area and leaf area ratio as compared to control. Increase
in concentrations of polluted water at 50% significantly effects
seedling length, specific leaf area and leaf rea ratio of polluted
water on mung bean.
The seedlings of P. vulgaris and V. radiata
tested different percentage of tolerance to waste water treatment
and found high in control treatment. The results showed that seedlings
of P. vulgaris showed lowest (32.59%) percentage of tolerance
to high concentration (100%) of polluted waste water treatment
of workshop. The treatment of polluted water at 25, 50, 75 and
100% decreased the tolerance indices values in seedlings of V.
radiata by 104.35, 83.37, 67.63 and 63.16 percent as compared
to control. The decrease in seedling growth of growth parameter
of P. vulgaris in this study revealed that it was might
be due to abiotic stress produced by waste water.
The chemical analysis of waste water showed gradually increase
values of pH (7.61-9.32), electrical conductivity (0.56-2.62 mScm-1),
chloride (13.60-50.96 mgL-1) and CaCO3 (45.90-65.21
mgL-1) as compared to control.
How to cite this article:
ZIA Y., IQBAL M. Z. & SHAFIQ M. 2022. The effects of automobile
motor workshop waste water on seedling growth of kidney bean and
mung bean crops under abiotic stress. J. Plant Develop.
29: 133-140.
https://doi.org/10.47743/jpd.2022.29.1.881
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