Brassinosteroid accelerates the growth of Psidium hybrid during acclimatization of seedlings obtained from minicuttings

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Abstract

Guava rootstocks can be multiplied by minicuttings in environment with a high relative humidity, being necessary an acclimatization period. Certain growth regulators favor the acclimatization, with brassinosteroids being successfully used in other fruit plants. This study aimed to shorten the multiplication time of the BRS Guaraçá hybrid by applying Biobras-16 (BB-16) during the acclimatization of seedlings obtained from minicuttings. The treatments consisted of five BB-16 concentrations (0, 0.1, 0.3, 0.5 and 1.0 mg L-1), applied in a randomized block design, in a split-plot arrangement, with four replications and five seedlings per plot, repeated at two seasons: winter and spring/summer. After 60 days of acclimatization, shoot and root growth indicators increased as a function of the BB-16 application, particularly at concentrations between 0.3 and 0.6 mg L-1. The brassinosteroid can be used to stimulate the growth of BRS Guaraçá seedlings obtained from minicuttings, shortening its production time and improving its seedling quality.

KEYWORDS: Plant growth regulator, guava rootstock, BRS Guaraçá.

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Author Biographies

Mariana Barreto de Souza Arantes, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE

Doutoranda em Produção Vegetal

Laboratório de Fitotecnia

Claudia Sales Marinho, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE

Professora pesquisadora Laboratório de Fitotecnia

Mara de Menezes de Assis Gomes, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE

Pesquisadora Laboratório Melhoramento Genético Vegetal

Raudielle Ferreira dos Santos, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE

Doutoranda em Produção Vegetal do Laboratório de Fitotecnia

Sydney Pereira Galvão, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE

Mestrando em Produção Vegetal no Laboratório de Fitotecnia

Giuliana Pulitini Vaz, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE

Aluna de iniciação científica do Laboratório de Fitotecnia.

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Published

2020-11-25

How to Cite

ARANTES, M. B. de S. .; SALES MARINHO, C.; DE MENEZES DE ASSIS GOMES, M. .; FERREIRA DOS SANTOS, R.; PEREIRA GALVÃO, S.; PULITINI VAZ, G. Brassinosteroid accelerates the growth of Psidium hybrid during acclimatization of seedlings obtained from minicuttings. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 50, p. e64743, 2020. Disponível em: https://revistas.ufg.br/pat/article/view/64743. Acesso em: 19 dec. 2024.

Issue

Vol. 50 (2020)

Section

Research Article

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