cells with chlorophyll are present 2 to 3 cell layers from epidermis on the outer region of the crack, while non-greening cells are present everywhere else. The inner region contains cells with large amyloplasts supporting germination as well as the most interior cells dying to form aerenchyma.

The length of the coleoptile can be divided into an irreversible fraction, length at turgor pressure 0, and reversible fraction, or elastic shrinking. Changes induced by white light