Accelerated senescence and nitrogen remobilization in flag leaves enhance nitrogen use efficiency in soft red winter wheat

Wheat (Triticum aestivum L.) production requires a large amount of nitrogen (N) supply because growers aim to achieve high grain yield and appropriate protein content simultaneously. A comprehensive understanding the mechanisms that underpin efficient N usage at limited in wheat can facilitate development new N-saving varieties this major crop. Here, we performed comparative analysis flag leaf responses availability soft red winter with contrasting use efficiency (NUE); VA08MAS-369 (high NUE) VA07W-415 (low NUE). This study demonstrated accelerated senescence along enhanced breakdown starch leaves was correlated higher yield, NUE for under limitation. The more dramatic reductions compounds carbohydrate reserves were linked significantly elevated expression genes enzymes associated these metabolic pathways genotype. Consistent gene data, nitrate reductase, glutamine synthetase, NAD-dependent glutamate dehydrogenase activities highly induced VA08MAS-369. It previously reported contributes increased regular supply. provides molecular physiological evidence vigorous remobilization also benefit deprivation.