PJB-2025-1549
Influence of exogenous application of L-proline on growth of barley (Hordeum vulgare L.) under cadmium stress
Moazma Batool, Qum Qum Noshad, Muhammad Ajaib, Muhammad Faheem Siddiqui, Haleema Sadia and Aysha Kiran
Abstract
Cadmium contaminated soil poses serious threat to human health and agriculture. Moreover, Cd toxicity poses significant challenges to the development of sustainable food production, particularly in crops like barley. Barley, due to its intrinsic ability to flourish in a variety of environmental stresses, grown on both small and large-scale farms. A pot experiment having completely randomized design with three replications was carried out to study the impact of foliar application of L-Proline (1mM) in reducing the toxic effects of cadmium (120μM) in two barley varieties, Jou-17 and Sultan-17. Cadmium stress results in remarkable reduction in plant biomass, leaf chlorophyll contents, carotenoids while improved the oxidative stress indicators like catalase, peroxidase and superoxide dismutase activity and tissue malondialdehyde and hydrogen peroxide contents. On the other hand, foliarly applied proline was effective in reducing toxicity of cadmium and also showed partial reversal of Cd stress by improving the growth attributes, Chlorophyll content, anthocyanins and carotenoids in barley. Of the two barley varieties, Jou-17 showed better performance under Cd stress in terms of enhanced leaf chlorophyll contents and less accumulation of H2O2 and MDA contents. Proline being an osmoprotectant infuses abiotic stress tolerance in barley plants under cadmium stress by reducing production of reactive oxygen species and enhanced accumulation of protein content
To Cite this article:
Batool, M., Q.Q. Noshad, M. Ajaib, M.F. Siddiqui, H. Sadia and A. Kiran. 2025. Influence of exogenous application of L-proline on growth of barley (Hordeum vulgare L.) under cadmium stress. Pak. J. Bot., 57(6): DOI: http://dx.doi.org/10.30848/PJB2025-6(24)
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