This month's winning image was submitted by John Runions (University of Cambridge (cjr41@cam.ac.uk)). It shows a plant hair cell (trichome) on a leaf primordium of Arabidopsis thaliana.

Green fluorescence represents a green fluorescent protein (GFP)-tagged thaumatin-like protein that is expressed in cell walls. Red fluorescence represents chlorophyll autofluorescence. The image was acquired using a confocal microscope (TCS SP, Leica). Bar, 100 μm.

The winner would like to acknowledge the help of Christopher Wilkins (University of Cambridge).

We are pleased to acknowledge the help of our two external advisors, Ariel Ruiz i Altaba (Developmental Genetics Program, New York Medical Center) and Lelio Orci (Department of Morphology, University Medical Center, Geneva).

To see more Cell of the Month winners, please visit our Cell of the Month archive: Cell of the Month archive