Cell plate formation is a process of cell division in plant cells, which involves the formation of a new cell wall in the middle of two daughter cells. It begins when the cell membrane at the equator of the dividing cell pinches inwards, forming a vesicle known as the preprophase band. The preprophase band then further develops into a structure called the phragmoplast. The phragmoplast is composed of microtubules, which are arranged into a plate-like structure. This plate-like structure then grows outward, forming a cell plate in the middle of the two daughter cells. The cell plate then develops into a new cell wall, which divides the two daughter cells from each other.