11846 10.30848/PJB2024-6(4) <p> Amelioration of salinity stress in <em>Brassica campestris</em> L.by exogenous application of KH₂PO₄<strong>&nbsp;</strong></p> Sheza Ayaz Khilji, Zahoor Ahmad Sajid and Muhammad Sabir Jamil <p> This investigation was conducted to assess the possible impact of exogenously applied potassium dihydrogen phosphate (KH₂PO₄) in alleviating salinity-induced stress in mustard plants (<em>Brassica campestris</em> L.). A pot experiment was conducted under field conditions with one plant/pot. After 30 days, plants were divided into eight groups <em>i.e</em>., A: Control (without salt and KH₂PO₄) B: Plants irrigated with 60 mM salt and without KH₂PO₄, C: Plants irrigated with 80 mM salt and without KH₂PO_4,D: Plants irrigated with 100 mM salt and without KH₂PO₄, E: Plant treated with 0.5 mM KH₂PO₄ alone, F: with 0.5 M KH₂PO₄ and 60 mM salt, G: with 0.5 M KH₂PO₄ and 80 mM salt, H: with 0.5 M KH₂PO₄ and 100 mM salt. According to the study&#39;s findings, salt significantly decreased all developmental and metabolic indicators. Nevertheless, the application of KH₂PO₄, at a concentration of 0.5 mM demonstrated its remarkable utility in enhancing growth and mitigating the negative consequences of salinity stress. The enhancement in growth could potentially be attributed to its comprehensive ameliorative properties, given that KH₂PO₄ is recognized for triggering seed germination, facilitating water absorption, and potentially functioning as a signaling molecule in saline environments. This study suggests that there is a possibility that suitable concentrations of KH₂PO₄ may be quite helpful in boosting plant growth and yield under stressful environments</p> Published 2024 56 6 2097 2105