8.2.3.1. Hormonal Control by the Axis
Most of the support for the possibility that hormones control the develop-
ment of activity of the mobilizing enzymes comes from testing the effects of
adding growth regulators to isolated storage tissue. This approach attempts to
answer the question, can these chemicals replace the influence of the axis? In
many cases, applied growth regulators induce greater breakdown of reserves in
isolated tissue and/or increase the activity of enzymes concerned with mobiliza-
tion. Cytokinins, for example, cause increases in amylolytic and proteolytic