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Effects of gibberellic acid (GA) under cadmium chloride stress on maize (Zea mays L.)


The International Journal of Biological Research (TIJOBR)

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Zoya Batool Naqvi1*, Lubaba Shamsi1, Sadia Nazir1, Ayesha Idrees1, Rimsha Abid1, Sania Yaqoob2

Aqsa Mumtaz2, Hina Firdous3*

1Department of BotanyUniversity of Agriculture, Faisalabad, Pakistan

2Department of Biological SciencesUniversity of Sargodha, Sub Campus Bhakkar, Pakistan

3Department of Plant PathologyUniversity of Agriculture, Faisalabad, Pakistan

*Corresponding author’s email: zoya786bk@gmail.comhinafirdous72@yahoo.com
Submitted Accepted Published
Sep 10,2019 Nov 12,2019 Jan 13,2020

2020 / Vol: 3 / Issue: 1


Abstract


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


Reference


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