What is promeristem and where is it located?

Promeristem refers to the earliest, most primitive form of meristematic tissue found at the extreme tips of roots and shoots. It represents the initial meristematic cells that give rise to all primary meristems in a plant. Promeristem cells are characterized by their small size, thin cell walls, dense cytoplasm, and large nuclei relative to cell size. These self-perpetuating cells continuously divide to produce new cells while maintaining their population. The promeristem is the ultimate source of all primary tissues in the plant body, making it crucial for apical growth and organ formation.