Gibberellic acid in the emergence and early development of star fruit seedlings

• Autor(a) principal: Passigatto Ortelan, André
• Data de Publicação: 2023
• Outros Autores: Cardozo Loriato, Arthur, Paixão, Marcus Vinicius Sandoval, Fontana Donadia, Gabriel, Dalmonech Zanotti, Kassio, Resende Fernandes, Antônio
• Tipo de documento: Artigo
• Idioma: eng; por
• Título da fonte: Diversitas Journal
• Texto Completo: https://diversitasjournal.com.br/diversitas_journal/article/view/2460
• topic: Propagação; Semente; Carambola; Propagation; Seed; Star fruit

Star fruit (Averrhoa carambola L.) is an exotic fruit originating in Southeast Asia and has seeds with low germination. The objective was to evaluate the effect of gib berellin on the emergence and initial development of star fruit seedlings. The seeds were removed from the fruits and washed in running water, and pl aced in gibberellin sol ution 1,000 mg.L-1, 2,000 mg.L-1, 3,000 mg.L-1, 4,000 mg.L-1and pure water as a control. for 30 minutes. Sowing was carried out b y placing 1 seeds per 280 mL tube in a substrate containing ravine soil + tanned manure (3:1) in a randomized block experimental design. Thirty days after the emergence of the first seedl ing, the percentage of emergence, emergence speed index and mean emergence time were evaluated. Ninety days after the emergence of the first seedling, the seedling height, collar diameter, number of leaves, root length were evaluated; green and dry massof the leaves, green and dry mass of the roots. The star fruit seed has a low percentage of germination, with low emergence rates, and the use of gibberellin was efficient to increase and accelerate emergence, showing a positive response to the variables plant height, number of leaves, stem diameter and length of the seed. source. The treatment with gibberell ic acid had a positive effect on the emergence and devel opment of star fruit seedlings, and on the mass production of leaves and roots, with the concentration of 1,000 mg.L-1showing the best results.