Monitoring Nutrient Uptake of Chard (Beta vulgaris var. cicla L.) Exposed to Exogenously Applied Nitric Oxide under Drought Stress

Nutrient uptake of chard under well-watered and drought conditions with different no applications were investigated in this research. no solutions were prepared with four doses (0, 50, 100, 150 and 200 μm) of sodium nitroprusside as a nitric oxide source and exogenously applied on only seeds (s) or together with seed and foliar (sf) of chard under different levels of drought according to 100% (control), 67% and 33% of the water required to reach field capacity. nutrient uptake drastically decreased under drought stress. however, progressive effects of no applications on nutrient uptake have been observed under both well-watered conditions and under drought. the increase in n and p uptake of plant were significant especially for doses of 100 and 150 μm for both s and sf applications. the highest fe, cu and zn content were obtained from 150 μm sf no application, while the highest mn and b were obtained from 150 μm s and 200 μm sf no application in 67% level. however, in 33% level the highest cu and b content were obtained from 150 μm sf no application, while the highest mn and zn obtained from 100 μm sf and the highest fe obtained from the 200 μm s no application.