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

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.

Rol de los brasinoesteroides en frutales con énfasis en condiciones de estrés abiótico: Una revisión

“…Los BRs se pueden utilizar para estimular el crecimiento de plántulas de guayaba obtenidas por miniesquejes, acortando el tiempo a producción y mejorando la calidad de las plántulas (Arantes et al, 2021). También se han utilizado BR en distintas concentraciones (0, 0,1, 0,5 y 1 mg L -1 ), en diferentes cultivares de uva sin semillas.…”