Present communication reports laboratory and pot experiments conducted to study the influence of water and osmotic stress on nitrogen uptake and metabolism in two wheat (Triticum aestivum L) cultivars with and without potassium supplementation. Polyethylene glycol 6000-induced osmotic stress/restricted irrigation caused a considerable decline in the activity of nitrate reductase, glutamate synthase, alanine and aspartate aminotransferases, and glutamate dehydrogenase. Potassium considerably improved nitrogen metabolism under normal water supply conditions and also resulted in amelioration of the negative impact of water and osmotic stresses indicating that potassium supplementation can be used as a potential tool for enhancing the nitrogen use efficiency in wheat for exploiting its genetic potential.
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Thanks to the Head, School of Studies in Botany, Jiwaji University, Gwalior for the facilities. Financial assistance from Jiwaji University (F/DEV/2013-14/33) and MPCST (1466/CST/R&D (BS)/2015), Bhopal to the first author, and UGC-RGNF to MT is gratefully acknowledged. Thanks are due to Prof Nafees A Khan, AMU, Aligarh for suggestions in maintaining sand cultures, and to Dr. Mohd Asgher for sharing SPSS and Sigma plot software.
Manuscript forms part of Ph D work of MA Ahanger. Conceived and designed by Prof RM Agarwal. MA Ahanger performed experiments and wrote the first draft of the manuscript, and RM Agarwal cross checked the results and manuscript. MT and RAM helped in literature survey and final preparation of the manuscript.
Conflict of interest
The authors declare that they have no conflict of interest.
Handling Editor: Néstor Carrillo
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Ahanger, M.A., Tittal, M., Mir, R.A. et al. Alleviation of water and osmotic stress-induced changes in nitrogen metabolizing enzymes in Triticum aestivum L. cultivars by potassium. Protoplasma 254, 1953–1963 (2017). https://doi.org/10.1007/s00709-017-1086-z
- Nitrogen metabolizing enzymes
- Water and osmotic stress
- Triticum aestivum L