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Plant growth regulators improve growth, photosynthesis, mineral nutrient and antioxidant system under cadmium stress in menthol mint (Mentha arvensis L.)

  • Abbu ZaidEmail author
  • Firoz Mohammad
  • Qazi Fariduddin
Research Article

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.

Keywords

Cadmium toxicity Cadmium tolerance Mentha arvensis Phytoremediation Plant growth regulators 

Notes

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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Copyright information

© Prof. H.S. Srivastava Foundation for Science and Society 2019

Authors and Affiliations

  1. 1.Plant Physiology and Biochemistry Section, Department of BotanyAligarh Muslim UniversityAligarhIndia

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