Abstract
Menthol mint (Mentha arvensis L.) cultivation is significantly affected by the heavy metals like cadmium (Cd) which also imposes severe health hazards. Two menthol mint cultivars namely Kosi and Kushal were evaluated under Cd stress conditions. Impact of plant growth regulators (PGRs) like salicylic acid (SA), gibberellic acid (GA3) and triacontanol (Tria) on Cd stress tolerance was assessed. Reduced growth, photosynthetic parameters, mineral nutrient concentration, and increased oxidative stress biomarkers like electrolyte leakage, malondialdehyde, and hydrogen peroxide contents were observed under Cd stress. Differential upregulation of proline content and antioxidant activities under Cd stress was observed in both the cultivars. Interestingly, low electrolyte leakage, lipid peroxidation, hydrogen peroxide and Cd concentration in leaves were observed in Kushal compared to Kosi. Among all the PGRs tested, SA proved to be the best in improving Cd-stress tolerance in both the cultivars but Kushal responded better than Kosi.
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Acknowledgements
Abbu Zaid is thankful to Aligarh Muslim University, Aligarh, and UGC-New Delhi India for financial assistance in the form of research fellowship No. BTM-2015-04-GH-7403. We acknowledge Professor Govindjee Govindjee (Professor Emeritus of Biophysics and Plant Biology in the Departments of Plant Biology, Biochemistry and the Center of Biophysics & Computational Biology, University of Illinois at Urbana-Champaign, Urbana, USA) for editing our MS and for making suggestions to improve our paper.
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Zaid, A., Mohammad, F. & Fariduddin, Q. Plant growth regulators improve growth, photosynthesis, mineral nutrient and antioxidant system under cadmium stress in menthol mint (Mentha arvensis L.). Physiol Mol Biol Plants 26, 25–39 (2020). https://doi.org/10.1007/s12298-019-00715-y
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DOI: https://doi.org/10.1007/s12298-019-00715-y