General Nature of Amplification - The occurrence of dynamic DNA amplification phenomena in different phases of plant development is widespread.

Extra DNA synthesis has been observed in a variety of differentiating, differentiated and dedifferentiating cell systems.

These observations allow us to formulate a working hypothesis that selective replication might be one of the main control mechanisms in plant growth and morphogenesis.

This process has often been found to be under hormonal control; genotypes may also exert an important influence on it.

The amplified DNA is of labile nature.