What is the primary function of phosphorus in plant growth?

Phosphorus plays a crucial role in energy transfer and is a key component in the formation of ATP (adenosine triphosphate), which is the energy currency of the cell. This function is vital for numerous processes in plants, including photosynthesis and respiration, where energy is required to convert light energy into chemical energy. Additionally, phosphorus contributes to the synthesis of nucleic acids, which are necessary for cell division and growth.

While root development is indeed influenced by phosphorus, especially in young plants, it is not its primary function. The role of phosphorus in disease resistance and chlorophyll production is also significant but secondary to its fundamental function in energy transfer. Overall, the essential role of phosphorus in energy metabolism and its impact on overall plant growth and development underscores why it is considered vital in these processes.