Plant physiology, or phytobiology, is the science that describes how plants function in all aspects — anatomical, histological, cytological, and molecular — at every level (cell, tissue, organ, organism), and in relation to their environment (soil, water).
Plant physiology studies the mechanisms that govern the functioning and development of plants.There are two main areas:

    Nutrition and Metabolism:The acquisition of elements essential for life (carbon- or nitrogen-based substances);The transformation of these elements and their integration into organic matter (biomass).

   Growth and Development: Mechanisms involved in the transition of a seed from a dormant state to a reproductive state (developmental cycle).