G. Ruizsifre et al., PRODUCTION AND MOVEMENT OF BRANCHING AGENT IN POINSETTIA LEAF AND STEM, The Journal of agriculture of the University of Puerto Rico, 79(3-4), 1995, pp. 139-151
Euphorbia pulcherrima Willd. ex. Klotzsch 'Eckespoint C-1 Red' (C-1) a
restricted-branching cultivar and 'CB' a free-branching vegetative or
graft-hybrid, were homo and heterografted. Length and number of axill
ary shoot nodes of C-1 receiver plants (plants which may receive the b
ranching agent from the donor plants) were partially increased by CB d
onors with leaves removed and with apical and basal parts removed. Sha
ding of CB donors partially increased the length of axillary shoots an
d the number of axillary shoot nodes of C-1 receivers above node 4. Pr
oduction and movement of the branching agent may occur in and go from
both stems and leaves of CB poinsettia donors to C-1 poinsettia receiv
ers. Shading CB donor leaves and stems did not prevent the production
and movement of the branching agent to C-1 receivers.