The induction of flowering in vitro in stem segments of Plumbago indica L.

Abstract

Internode segments excised from vegetative Plumbago indica plants are responsive to photoperiodic treatments in vitro. Under long days, they produce vegetative buds; under short days, they develop inflorescences. These inflorescences can remain devoid of flowers (“vegetative inflorescences”), or produce normal flowers which open in the test tubes. The minimum duration of the short-day treatment capable of inducing flowering is of the order of 4 weeks.