PATRICK LYNCH / SCIENCE PHOTO LIBRARY PATRICK LYNCH / SCIENCE PHOTO LIBRARY
Light micrograph of a cross-section through the root of the buttercup Ranunculus acris, a dicotyl- edon. The photo shows a lateral, or branch root, developing at top right. Laterals are produced deep within the main root from a special layer of cells surrounding the vascular tissue. As the new lateral pushes outwards, it crushes the cells of the root cortex which are in its way. The specimen has been stained with green dye that colours the cell walls, & red dye which has stained starch grains (small particles in the cortical cells) as well as the thickened walls of the xylem cells in the centre of the root & other cells in the lateral itself. Magnification: x5 at 35mm size. Reference: MICROCOSMOS, Fig.
Model release not required. Property release not required.