PJB-2024-1558
Selection of canola (Brassica napus) based on agronomic and physiological responses for better growth under cadmium toxicity
Khalid Bilal, Nosheen Noor Elahi and Muhammad Imtiaz
Abstract
Cadmium (Cd) is one of the potential toxins for plants. It disturbs the physiological and biochemical processes in plants, resulting in poor plant growth and yield of crops. As the complete removal of Cd toxicity from soil is quite difficult, scientists are working on selecting such tolerant varieties. These varieties cannot only provide the optimum crop yield but also can play an important role in the removal of Cd from the soil. Considering the importance of canola, a current study was planned to screen the Cd tolerant, moderate, and susceptible canola variety. For that total, 15 varieties were sown in a hydroponic experiment using different toxicity levels of Cd, i.e., tap water (no Cd), 0.2, 0.4, 0.6, and 0.8 mg/L. Results showed that CON-II and CON-III performance was significantly better for improvement in shoot length, root length, seedling fresh and dry weight than sandal canola, rainbow, and Oscar at all levels of Cd toxicity. A significantly improved chlorophyll content also validated the better tolerance of CON-II and CON-III over sandal canola, rainbow, and Oscar. The highest antioxidant activity and electrolyte leakage at 0.8Cd was noted in AARI canola, Oscar, sandal canola, and rainbow, which showed that these varieties were susceptible to Cd toxicity. In conclusion, CON-II and CON-III were observed as tolerant, sandal canola, rainbow, and Oscar were found susceptible while remaining as moderate canola varieties against Cd toxicity. More investigations are suggested at the pot and field level to declare the best tolerant, moderate, and highly susceptible canola varieties again Cd
To Cite this article:
Bilal, K., N.N. Elahi and M. Imtiaz. 2024. Selection of canola (Brassica napus) based on agronomic and physiological responses for better growth under cadmium toxicity. Pak. J. Bot., 56(6): DOI: http://dx.doi.org/10.30848/PJB2024-6(12)
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