Regulation of Expression Represents the Difference Between Direct and Indirect Shoot Regeneration.

Somatic cells of higher plants possess the remarkable ability to regenerate new individuals via reestablishing apical meristems. Reconstitution of shoot meristem is the vital process and is required for application of plant biotechnology. Under culture condition, shoot meristem can be formed directly or indirectly, depending on the absence or presence of callus as the intermediate status.