How can a complete carrot plant grow from a single mature carrot cell?

The ability of a single mature carrot cell to grow into a complete plant provides striking evidence that individual plant cells contain all the genetic information necessary to produce an entire organism, including roots, stems, and leaves.1

This process is facilitated through tissue culture techniques. By isolating a cell from a mature carrot and placing it in a specialized medium—which typically includes inorganic elements, sugar, vitamins, and specific growth regulators—scientists can induce the cell to undergo cell division and differentiation.12

In these experimental conditions, the balance of plant hormones is critical. For example, cytokinins and auxins are used to regulate development; high auxin and low cytokinin levels generally encourage root development, while low auxin and high cytokinin levels promote the growth of shoots. Through these controlled stages of morphogenesis, the isolated cell can regenerate into a fully functional plant.314