Red arrow indicates the progressive basipetal termination of divisions.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

PINOID kinase regulates root gravitropism through modulation of PIN2-dependent basipetal auxin transport in Arabidopsis thaliana.    From Wordnik.com.  [SpaceRef Top Stories] Reference

First, in leaves it has been shown that division ceases in a basipetal wave from the top downward similar to what we see in the sepal.    From Wordnik.com.  [PLoS Biology: New Articles] Reference