growth. ACTIN-DEPOLYMERIZING FACTORs (ADFs) typically contribute to actin turnover by
severing/depolymerizing actin filaments. Recently, we demonstrated that Arabidopsis
subclass III ADFs (ADF5 and ADF9) evolved F-actin-bundling function from conserved F-
actin-depolymerizing function. However, little is known about the physiological function, the
evolutional significance, and the actin-bundling mechanism of these neofunctionalized …