Paclobutrazol in the cultivation of Adenium obesum
Abstract
In floriculture, more specifically in the segment of ornamental packaged plants, Adenium obesum has gained popularity. This is due to the important role it plays in the market of ornamental plants. Although its aesthetic standardization as a potted plant has not been defined yet, studies with focus on reducing its size are necessary. Thus, this paper aimed at evaluating the effects of different doses of the vegetal growth retardant paclobutrazol (PBZ) in Adenium obesum plant development and quality, in order to enable a differentiated product for the market of flowers and potted plants. The experiment was conducted in a vegetation house in randomized complete blocks with four repetitions. Six treatments were provided, that is, one single application of: 5; 10; 20; 40 and 80 mL of the active ingredient of PBZ, and the control treated with water only. For the biochemical evaluations, we verified the effect of treatments for the anthocyanin variable, with PBZ impairing the concentration of anthocyanin present in leaf tissues. The dose of 80 mL of PBZ reduced the length of aerial part in 37.29% in relation to the control. Despite the decrease observed in the plant final size, the phytotoxic effects caused by PBZ prevented its utilization in the Adenium obesum commercial production.Downloads
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doi.org/10.33158/ASB