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Mungbean: a nickel indicator, accumulator or excluder?
M S A Ahmad1, M Hussain, R Saddiq
1Department of Botany, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan. sajidakeel@yahoo.com
Bulletin of Environmental Contamination and Toxicology
|July 11, 2007
Summary
Nickel exposure harms mungbean growth, photosynthesis, and yield. Plants showed reduced cation accumulation, with nickel primarily accumulating in roots, limiting its spread to shoots and leaves.
Area of Science:
- Plant Science
- Environmental Toxicology
- Agricultural Science
Background:
- Nickel is a heavy metal pollutant with potential phytotoxicity.
- Mungbean (Vigna radiata) is a vital legume crop susceptible to environmental stressors.
- Understanding nickel's impact on mungbean is crucial for agricultural sustainability.
Purpose of the Study:
- To investigate the effects of varying nickel concentrations on mungbean growth and physiology.
- To quantify nickel's impact on photosynthetic pigments, yield, and cation accumulation.
- To determine nickel's translocation patterns within mungbean plants.
Main Methods:
- Mungbean seeds were treated with nickel sulfate at concentrations of 25, 30, 35, and 40 mg L(-1).
- Control groups received no nickel treatment.
- Growth parameters, photosynthetic pigments, yield attributes, and cation content were analyzed.
Main Results:
- Nickel stress significantly reduced plant growth, photosynthetic pigments, and yield attributes.
- Cation (Na(+), K(+), Ca(2+)) accumulation decreased under nickel stress.
- Nickel accumulation was predominantly observed in roots, with limited translocation to shoots and leaves.
- Lower nickel concentrations (25 mg L(-1)) caused less severe effects compared to higher concentrations (40 mg L(-1)).
Conclusions:
- Nickel contamination negatively impacts mungbean productivity and physiological functions.
- Mungbean exhibits a degree of tolerance by sequestering nickel in its root tissues.
- These findings highlight the importance of managing nickel levels in agricultural soils to protect mungbean cultivation.
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