What part of the celery turns red if you put it into red coloring an wait a few hours?

When you place celery stalks in red food coloring, the red pigment primarily travels through the xylem, the tissue responsible for water and nutrient transport. As the celery absorbs the colored water, the tips and leaves of the celery will typically show the most intense red coloration. This happens because the xylem vessels extend throughout the plant, allowing the dye to move upward and accumulate in those areas. The base of the celery may also show some coloration, but the most pronounced red will appear at the top.