What is the name of the stem’s function of storing reserve nutrients?

This is the storing function of the stem. There is also a transport, support and synthesizing function of this plant organ. Basically, it is the core of the stem that performs the storage function. Special cells are concentrated there, which store the produced organic matter. The plant will be able to use them when the process of photosynthesis is impeded or there is an insufficient amount of inorganic substances for the synthesis of glucose. The plant will use up some of these reserves in winter, when it is in a state of sleep.