Genetic portrait of polyamine transporters in barley: insights in the regulation of leaf senescence
Nitrogen (N) is one of the most expensive nutrients to supply, therefore, improving the efficiency of N use is essential to reduce the cost of commercial fertilization in plant production.Since cells cannot store reduced N as NH3 or NH4+, polyamines (PAs), the low molecular weight aliphatic nitrogenous bases, are important N storage compounds in pl