Growth attributes,biochemical modulations,antioxidant enzymatic metabolism and yield in Brassica napus varieties for salinity tolerance |
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Authors: | Rashda Naheed Humaira Aslam Hina Kanwal Fozia Farhat Mohammad I Abo Gamar Amina AM Al-Mushhin Dilfuza Jabborova Mohammad Javed Ansari Sehar Shaheen Muhammad Aqeel Ali Noman Kamel Hessini |
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Institution: | 1. Department of Botany, Faculty of Sciences, Government College Women University, Faisalabad, Pakistan;2. Department of Biological Science, Faculty of Science, Yarmouk University, Irbid, Jordan;3. Department of Biology, College of Science and Humanities in Al-Kharj, Prince Sattam bin abdul aziz University, Al-Kharj 11942, Saudi Arabia;4. Laboratory of Medicinal Plants Genetics and Biotechnology, Institute of Genetics and Plant Experimental Biology, Uzbekistan Academy of Sciences, Tashkent Region, Kibray 111208, Uzbekistan;5. Division of Microbiology, ICAR-Indian Agricultural Research Institute, Pusa, New Delhi 110012, India;6. Department of Botany, Hindu College Moradabad (Mahatma Jyotiba Phule Rohilkhand University Bareilly), 244001, India;7. State Key Laboratory of Grassland Agro-ecosystems, School of Life Science, Lanzhou University, Lanzhou, Gansu 730000, People''s Republic of China;8. Department of Botany, Government College University, Faisalabad, Pakistan;9. Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia |
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Abstract: | Improvement in salinity tolerance of plants is of immense significance as salt stress particularly threatens the productivity of agricultural crops. This study was designed to assess the tolerance level of six Brassica napus varieties (Super, Sandal, Faisal, CON-111, AC Excel and Punjab) under different levels of salinity (0, 50, 100, 150 & 200 mM) with three replications under CRD. Salt induced osmotic stress curtailed the plant growth attributes, photosynthetic pigments and disturbed ionic homeostasis (K+, Na+, Ca2+, Cl-) but least disturbance as compared to control was found in Super and Sandal cultivars. Punjab canola and AC Excel canola cultivars were least tolerant to salinity because these displayed greater decline in all growth and biochemical attributes. Plants subjected to NaCl induced stress exhibited considerable decline in all attributes under study with proline as exception. Antioxidants (CAT, SOD & POD) showed an obvious change in Canola plants under stress, but greatest decline was displayed at 200 mM NaCl level in all six cultivars. Over all these attributes presented a comparatively stable trend in super and sandal cultivars. This shows presence of physiological resilience and metabolic capacity in these two cultivars to tackle salinity. Similarly, all yield attributes displayed adverse behavior under 150 mM & 200 mM salinity stress. Our results demonstrated that Super and Sandal cultivars of Brassica napus exhibit good performance in salinity tolerance and can be good option for cultivation in salt affected areas. |
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Keywords: | Canola NaCl induced salt stress Proline Flavonoids Antioxidants Yield |
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