Nitrate uptake and N allocation in Triticum aestivum L. and Triticum durum Desf. seedlings
Trckova, M.(Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic))E-mail:trckova@vurv.cz | Stehno, Z. | Raimanova, I.
Inter- and intra-species differences in nitrate uptake and N allocation were studied in wheat seedlings. Two collections of wheat cultivars Triticum aestivum and Triticum durum were grown at controlled conditions in hydroponics. At the age of 3 weeks the net rate of nitrate uptake was measured, the plants were harvested and analyzed for N concentration. In contrast to the net rate of NO3- uptake (3.98-8.57 micromol/g FW/h) the net NO3- uptake capacity of T. aestivum roots (6.37-11.66 micromol/plant/h) significantly differed from T. durum roots (15.26-22.69 micromol/plant/h). Pronounced intra-species differences were found in T. aestivum cultivars, whereas they were not significant in T. durum group. In both species, about 70% total N was found in shoots. Significant differences in N concentration and its allocation were affected by growth rate in early stages of development.
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