Spindle motility skews division site determination during asymmetric cell division in Physcomitrella

Abstract

In plants, the site of asymmetric cell division (ACD) is generally thought to be determined by the preprophase band and the mitotic spindle is typically static. However, the authors show here that the moss Physcomitrella has motile mitotic spindles that can skew ACD in the absence of preprophase bands.