Paclobutrazol in the cultivation of Adenium obesum
Resumo
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
Referências
Albornoz A, Fernández M, Vilchez J, Fernández C and Martínez L (2014) Efecto del paclobutrazol sobre el crecimiento de plantas de berbería (Nerium oleander L.) en fase de vivero. Revista de la Facultad de Agronomía de la Universidad del Zulia 31(Suppl 1):301-311.
Al-khassawneh NM, Karam NS and Shibli RA (2006) Growth and flowering of black iris (Iris nigricans Dinsm.) following treatment with plant growth regulators. Scientia Horticulturae 107(2):187-193.
Araújo SAC and Deminicis BB (2009) Fotoinibição da fotossíntese. Revista Brasileira de Biociências 7(4):463-472.
Barbosa JG, Barbosa MS, Tsuji SS, Muniz MA, Grossi JAS and Rubim M (2008) Cultivo de girassol ornamental (Helianthus annuus L.) em vaso sob diferentes doses de paclobutrazol. Ornamental Horticulture 14(2):205-208.
Barbosa JG, Muniz MA, Mesquita DZ, Cota FO, Barbosa JM, Mapeli AM, Pinto CMF and Finger FL (2011) Doses de solução nutritiva para fertirrigação de pimentas ornamentais cultivadas em vasos. Ornamental Horticulture 17(1):29-36.
Bonacin GA, Rodrigues TJD and Mattiuz CFM (2006) Aplicação de retardadores de crescimento em híbridos de girassol ornamental. Ornamental Horticulture 12(1):37-42.
Dimmitt M, Joseph G and Palzkill D (2009) Adenium: Sculptural Elegance, Floral Extravagance. Scathingly Brilliant Idea, Tucson.
Junqueira AH and Peetz MS (2014) O setor produtivo de flores e plantas ornamentais do Brasil, no período de 2008 a 2013: atualizações, balanços e perspectivas. Ornamental Horticulture 20(2):115-120.
Lima Júnior JC, Nakatani JK, Monaco Neto LC, Lima LACV, Kalaki RB and Camargo RB (2015) Mapeamento e Quantificação da Cadeia de Flores e Plantas Ornamentais do Brasil. OCESP, São Paulo, 132p.
Mauk CS, Unrath CR, Blankenship SM and Lehman LJ (1990) Influence of method of application of paclobutrazol on soil residues and growth retardation in a �??Starkrimson-Delicious�?? apple orchard. Plant growth regulation 9(1):27-35.
Mcbride K, Henny RJ, Chen J and Mellich TA (2014) Effect of light intensity and nutrition level on growth and flowering of Adenium obesum �??Red�?? and �??Ice Pink�??. HortScience 49(4):430-433.
Murray JR and Hackett WP (1991) Dihydroflavonol reductase activity in relation to differential anthocyanin accumulation in juvenile and mature phase Hedera helix L. Plant Physiology 97:343-351.
Ochoa J, Franco JA, Bañón S and Fernández JA (2009) Distribution in plant, substrate and leachate of paclobutrazol following application to containerized Nerium oleander L. seedlings. Spanish Journal of Agricultural Research 7(3):621-628.
Oyen LPA (2008) Adenium obesum (Forssk.) Roem. & Schult. Schmelzer GH and Gurib-Fakim A (eds.) Medicinal plants 1. Editor Prota, Wageningen,11:1-7.
Pardos M, Calama R, Montero G and Pardos JA (2005) Growth of container-grown cork oak seedlings as affected by foliar and soil application of paclobutrazol. HortScience 40(6):1773-1776.
Scatena VL and Nunes AC (1996) Anatomia de Pleurothallis rupestris lindl. (orchidaceae) dos campos rupestres do brasil. Boletim de Botânica da Universidade de São Paulo 15:35-43.
Scientific J (1991) Table Curve: Curve fitting software. Jandel Scientific, Corte Madera, CA.
Silva FAS and Azevedo CAV (2016) The Assistat Software Version 7.7 and its use in the analysis of experimental data. African Journal of Agricultural Research 11(39):3733-3740.
Taiz L and Zeiger E (2013) Fisiologia vegetal. 5. ed. Artmed, Porto Alegre.
Varella TL, Silva GM, Cruz KZCM, Mikovski AI, Nunes JRS, Carvalho IF and Silva ML (2015) In vitro germination of desert rose varieties. Ornamental Horticulture 21(2):227-234.
Wellburn AR (1994) The spectral determination of chlorophylls a and b, as well as total carotenoids, using various solvents with spectrometers of different resolution. Journal of Plant Physiology 144:307-313.
Copyright (c) 2020 ASB Journal
This work is licensed under a Creative Commons Attribution 4.0 International License.
