Three types of spring wheat were studied to see how their roots responded to low nitrogen levels. The roots of wheat plants grew less and were shorter under low nitrogen stress. However, one type of wheat, Gzandin, had better root characteristics and absorbed nitrogen more efficiently than the other two types. This means Gzandin is better suited for growing in low nitrogen conditions. The total nitrogen uptake by the roots was closely related to their size and activity under low nitrogen stress, showing that root shape is important for absorbing nitrogen in stressful conditions.