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In a greenhouse experiment. the nitrogen uptake and distribution responses of two wheat (Triticum aestivum L) cultivars. one of which known
t()r salt tolerance, were evaluated in a split plot design with three replications. Salinity levels used. were zero. 2.5 and 5.n g/I of NaCI in irrigation water.
starting with 22 days after seed germination. The tissue nitrogen content in different parts of the plant was determined using Kjcldahl method. The results
showed that N uptake decreased with increasing salinity levels. but the slope varied significantly, being lower in the tolerant Tabassi Cy.. as compared with
Inia - 66. It seems that N uptake is inhibited in the presence of high levels of univalent cat ions such as Na + The two cuitivars differed. regarding N
distribution pattern within the plant body. Tabassi CV.. despite an initially
higher N accumulation allocated lower amount of N to straw. and a higher amount to the grain, thereby its nitrogen yield significantly increased as
compared with Inia - 66. The results indicate that nitrogen accumulation and distribution in wheat could be considered as a trait related to and dependent
on salinity resistance.