The International Journal of Biological Research (TIJOBR)
Zoya Batool Naqvi1*, Lubaba Shamsi1, Sadia Nazir1, Ayesha Idrees1, Rimsha Abid1, Sania Yaqoob2,
Aqsa Mumtaz2, Hina Firdous3*
1Department of Botany, University of Agriculture, Faisalabad, Pakistan
2Department of Biological Sciences, University of Sargodha, Sub Campus Bhakkar, Pakistan
3Department of Plant Pathology, University of Agriculture, Faisalabad, Pakistan
|Sep 10,2019||Nov 12,2019||Jan 13,2020|
2020 / Vol: 3 / Issue: 1
The maize is major cash crop of Pakistan after wheat and rice. It is exposed to many biotic and abiotic stresses throughout the life. Worldwide the contamination of soils with heavy metals is a serious environmental issue. Among the heavy metals the Cadmium (Cd) is a highly toxic metal because of its negative effects on plant growth and development. To determine the effect of GA and Cd, a pot experiment was conducted in the Old Botanical Garden University of Agriculture Faisalabad. Two different maize varieties were used (Neelam and Desi makai). The two concentrations of cadmium chloride (0 μM and 200 μM) and Gibberellic acid (0mg and 0.25 mg) were applied. The experiment was performed under CRD with three replications. Stress was applied after every 10 days and gibberellic acid was applied once in three leaves stage. After 60 days the plants were harvested. Different physiological parameters like chlorophyll (a, b, a/b), carotenoids contents, photosynthetic rate, transpiration rate, stomatal conductance, CO2 conductance, POD and total soluble proteins were recorded. All studied parameters were negatively affected by cadmium chloride while the foliar application of gibberellic acid improved these traits under cadmium chloride stress. Overall, Desi Makai performed better then Neelam in both stress and spray conditions.
Key word: cadmium chloride, gibberellic acid, Maize
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