Hormonal control of proliferation in meristematic agglomerates of Eucalyptus camaldulensis Dehn

Eucalyptus camaldulensis can he micropropagated through so-called meristema tic agglomerates (MAs). MAs (4-6 mm diameter) are dense shoot clusters init iated by the Outgrowth of numerous successive buds. Their reddish nature is associated with an increase ill their endogenous cytokinin level during th e exponential phase of growth. A simultaneous decrease in the auxin level f avors a high cytokinin/auxin ratio. A low level of polyamines occurs at the time of the lowest level of auxins. Slow hormone release by activated char coal plays a role in this very prolific organogenesis.