Nitrate assimilation in leaf blades of wheat of different age

Pokhriyal, T. C. ; Sachdev, M. S. ; Grover, H. L. ; Arora, R. P. ; Abrol, Y. P. (1980) Nitrate assimilation in leaf blades of wheat of different age Physiologia Plantarum, 48 (3). pp. 477-481. ISSN 0031-9317

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A field experiment on wheat (Triticum aestivum L.) ev. Shera grown at 120 kg N ha-1 was conducted. Half of the dose of fertilizer N was applied at the pre-sowing stage and the other half when the seedlings were one month old. The leaf blades were examined for their NO3- content and NO3- assimilatory activity at various stages of growth and development. Soil nitrate level at 50 cm depth was determined throughout the wheat growing season in terms of cencentration (µg/ml) and total amount (kg ha-1). The upper leaf blades were examined for their capacity to assimilate NO3-. Highly significant correlation between NR (nitrate reductase) activity and NO3- content in the leaf blades. NR activity and soil NO3-, and between soil NO3- and leaf blade NO3- was observed. Findings on low soil NO3- status during the reproductive phase and the capacity of the upper leaf blades to assimilate additional amounts of NO3-, point to the need for developing a programme of soil fertilizer application whereby all the leaf blades can utilize the NO3- optimally and thus result in greater N harvest.

Item Type:Article
Source:Copyright of this article belongs to Scandinavian Society for Plant Physiology.
Keywords:Wheat; Triticum aestivum; Nitrate Assimilation; Nitrate; Soil Nitrate
ID Code:28896
Deposited On:18 Dec 2010 05:49
Last Modified:11 May 2011 06:20

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