Root Tip (IMAGE) Institute of Science and Technology Austria Caption A root tip consists of constantly dividing cells of specific types. These cell types are oriented in concentric circles around the middle cells and originate from a few stem cells in the stem cell niche located in the very tip of the root (white cells). Credit IST Austria/Lukas Hörmayer Usage Restrictions with credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.