Many of the cells of the root meristem are not undergoing mitosis rather they are in a stage called?

Many of the cells in the root meristem are in a stage called "cell differentiation" or "cell maturation," where they are not actively dividing. During this stage, cells begin to take on specific functions and characteristics necessary for the plant's growth and development. While some cells continue to divide, others will specialize into various types of root tissues, contributing to the overall structure and function of the root system.