The transition from cell division to differentiation in primary roots is dependent on precise gradients of phytohormones. including auxin. cytokinins and brassinosteroids. The reorganization of microtubules also plays a key role in determining whether a cell will enter another round of mitosis or begin to rapidly elongate as the first step in terminal differentiation. https://chefesquipmenters.shop/product-category/plastic-tumblers/