During development many plant cells undergo endoreduplication, whereby ploidy increases to a multiple of the normal 2C content. For eg., trichome development is accompanied by an increase in ploidy to 32C, indicating that trichome cells undergo four rounds of endoreduplication. The method, protocol describes a technique of DNA levels, and hence developmental progress in the corresponding cells, are measured by staining the DNA with a fluorescent marker and then quantifying the fluorescence of individual nuclei.

Protocol: Whole-Mount DAPI Staining and Measurement of DNA Content in Plant Cells