At the root tips of the mustard plant Arabidopsis thaliana (cell walls shown in red), two proteins work together to control the uptake of water and nutrients. When the cell division-promoting protein 'SHORTROOT' (SHR) moves from the center of the tip outward, it triggers the production of another protein (blue) that confines 'Short-root' to the nutrient-filtering endodermis. See Fig 3C in H Cui et al. 2007 Science 316, 421-425
Biological Process: Water uptake
Author: Philip Benfey
Source: The Cell: An Image Library
