the development of enzyme patterns was followed in the course of : ( a ) the irreversible cell differentiation via division and expansion to maturity in the root tip and coleoptile of the intact seedlings , ( b ) the irreversible cell dedifferentation associated with induction and establishment of callus from the growing internodes , and ( c ) the growth cycle ( proliferation ? stationary phase ) in callus and cell-suspension cultures of maize ( zea mays l. ) .
C0007589
the
C0007634
cell