I International Symposium on tropical Horticulture edition:1 location:Kingston, Jamaica
In the family of Bromeliaceae it is established that flower induction is promoted by using ethylene or the ethylene precursor 1-aminocyclopropane-1-caboxylic acid (ACC). However an adequate developmental stage of the plant is required to be susceptive for this flowering treatment. On the other hand younger and hence more compact plants are more desired for marketing. In this paper the possibilities of early flowering induction were investigated. Vriesea ‘Ginger’ plants in different stages of development (15, 18, 22, 30, 38, and 52 weeks of greenhouse growth) were subjected to applications with ethylene or ACC. The minimal age required for both treatments to induce flowering was 18 weeks. This was also reflected in the endogenous ACC evolution in young leaves and meristems from vegetative plants which show a considerable increase from 18 weeks on, suggesting that the plants leave the juvenility status around 18 weeks and become prone to flowering induction. Anthesis took place 124 days after flower induction for all developmental stages and treatments independent of plant age. The morphology of the inflorescence (inflorescence’s height and branch number per plant) was independent of the flower induction treatment but was linked with the developmental stage of the plants at the moment of induction. Younger plants presented less branched inflorescences with longer branches than older plants. From 38 weeks on, plants showed at least four branches, achieving appeal for the common market.