Hormonal control of proliferation in meristematic agglomerates ofEucalyptus camaldulensisDehn


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Abstract

SummaryEucalyptus camaldulensis can be micropropagated through so-called meristematic agglomerates (MAs). MAs (4-6 mm diameter) are dense shoot clusters initiated by the outgrowth of numerous successive buds. Their reddish nature is associated with an increase in their endogeneous cytokinin level during the exponential phase of growth. A simultaneous decrease in the auxin level favors 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 charcoal plays a role in this very prolific organogenesis.

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