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Plant regulator and biostimulant in yellow passion-fruit floral induction under non inductive condition

The objective of the present work was to evaluate the effect of plant regulator and biostimulant in the floral induction of yellow passion-fruit under non inductive conditions in Araguari-MG. Twelve tertiary branches were identified and trimmed per plot (04/02/04), whereas six were exposed, on one side of the supporting stick, with predominant luminosity during the morning and six on the other side of the supporting stick, with luminosity during the evening. The experimental design was subdivided plots, with main treatments (plots): 0mg L-1 (control); 100mg L-1; 200mg L-1 and 300mg L-1 of plant regulator GA3 (i.a.); 2.08 mL L-1; 4,17mL L-1 and 6.25mL L-1 of StimulateTM biostimutant (i.a.), in two leaf applications (04/09/02 e 05/09/02), supplemented with SilwettTM adhesive spread at 0.05%. Besides those treatments, secondary treatments were used (subplots): exposition of the branches to morning and evening light, with four repetitions and three plants per plot. Each subplot was one of the sides of the supporting stick. The data was submitted to the analysis of variance. In both sides of the supporting stick, the length of the branches and internodes, the numbers of nodes, of leaves and of floral buds were evaluated at 75 days after the first application of the treatments. The variables studied were not influenced by the use of GA3 and StimulateTM, however, there was difference when the branches were exposed to morning light in relationship to those exposed to evening light.

flowering; gibberelin; Passiflora edulis Sims f. flavicarpa; Stimulate


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