I have successfully acclimatized various species of tissue culture raised Dendrobiums. Although they are thriving well in greenhouse/growth chamber conditions (almost 1 year) flowering is not noted. Can anybody suggest how I can induce the flowering in these greenhouse hardened plants?
As far as flowering in plants is concerned, it is induced after completion of vegetative growth. At that stage only plants can able to synthesize florigen or other hormones required for induction flowering. In vitro flowering from axillary buds, of matured plants, with appropriate growth regulators in the tissue culture medium can be tried or spraying of the PGR on the leaves of greenhouse grown plants can be tried to induce flowering.
If your Dendrobiums originate from a monsoon-area, they might need a strictly dry period to trigger flowering.
I agree with kindren that you need some drye condition to promote flowering, do not irrigate much.
Stress conditions stimulate flowerig. Longterm culture on cytokinis may promote vegetative growth. You may use some growth retardents like dry cpnditions, spry of abscisic acid or treatent of ethalene precurseres.
Dear Prof. Edwards
I am trying to induce flowering in invitro raised Dendrobium nobile, Dendrobium crepidatum basically. Both of them are having identical climatic requirements for growth and flowering.
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