 Instead, the microtubules of the mitotic spindle aggregate on the nuclear surface and are reoriented to form the spindle at the end of prophase.The preprophase band also functions in properly orienting the mitotic spindle, and contributes to efficient spindle formation during prometaphase 

The preprophase band disappears as soon as the nuclear envelope breaks down and the mitotic spindle forms, leaving behind an actin-depleted zone.However, its position marks the future fusion sites for the new cell plate with the existing cell wall during telophase.