GFP - Growing root tip with dividing cells - mitosis

This is a growing root tip of Arabidopsis thaliana - a small plant in the family Brassicaceae related to mustard. Each nucleus glows because the chromosomes are marked with green fluorescent protein. I count 13 cell division events as the root grows. Cell divisions are visible as chromosomes condense during metaphase of mitosis. How many can you find? Video by Smita Kurup and John Runions For lots more confocal microscopy, see the Runions’ lab website: