_____________________________________________________________________________________________________ *Corresponding author: E-mail: apapurbapal@gmail.com; International Journal of Environment and Climate Change 10(9): 100-111, 2020; Article no.IJECC.59879 ISSN: 2581-8627 (Past name: British Journal of Environment & Climate Change, Past ISSN: 2231–4784) Effect of Salinity Stress on Antioxidative Enzyme Activity in the Leaves of Tolerant and Susceptible Genotypes of Groundnut Apurba Pal 1* , Debjani Dutta 2 , Anjan Kumar Pal 2 and Sunil Kumar Gunri 3 1 Horticulture College, Birsa Agricultural University, Kanke, Ranchi, Jharkhand-834006, India. 2 Department of Plant Physiology, F/Ag, Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal-741252, India. 3 Department of Agronomy, F/Ag, Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal-741252, India. Authors’ contributions This work was carried out in collaboration among all authors. Author AP managed the work, wrote the paper and performed statistical analysis. Author DD helped the author AP during the experiment. Author AKP designed the experiment and guided as and when required. Author SKG provide plant materials for this experiment. All authors read and approved the final manuscript. Article Information DOI: 10.9734/IJECC/2020/v10i930233 Editor(s): (1) Dr. Anthony R. Lupo, University of Missouri, United States of America. Reviewers: (1) Raquele Mendes De Lira, Unidade Acadêmica de Serra Talhada (UAST), Brazil. (2) Roberta Camargos de Oliveira, Ederal University of Uberlândia, Brazil. Complete Peer review History: http://www.sdiarticle4.com/review-history/59879 Received 01 June 2020 Accepted 06 August 2020 Published 12 August 2020 ABSTRACT Aims: To better understand the physiological and biochemical mechanisms in the light of antioxidative enzymes activity under salinity stress between tolerant and susceptible genotypes of groundnut. Study Design: Completely Randomized Design. Place and Duration of Study: The laboratory experiment was carried out in the departmental laboratory of Plant Physiology, Bidhan Chandra Krishi Viswavidyalaya (BCKV), Mohanpur, Nadia, and West Bengal during the year 2017-18. Methodology: A controlled study was conducted to screen 26 genotypes of groundnut under 200 mM NaCl salinity stress. Fourteen-day old seedlings were subjected to salinity treatment. For this, the modified Hoagland nutrient solution containing 200 mM NaCl (osmotic potential: -0.8 MPa) was Original Research Article