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

Authors

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

Issue

Vol. 50 (2020)

Section

Research Article

License

Authors will not be paid for published articles and must waive their copyright in favor of the PAT journal. On the other hand, they are solely responsible for the content of those articles, even if the Editor holds the right to adjust them to the norms of the journal. Authors are allowed to publish their articles simultaneously in their institutional repositories, as soon as the original publication at the PAT journal is mentioned.

How to Cite

ARANTES, M. B. DE S. et al. Brassinosteroid accelerates the growth of Psidium hybrid during acclimatization of seedlings obtained from minicuttings. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], v. 50, p. e64743, 25 Nov.2020.