Resumo

PEREZ, Alfredo M. et al. Agronomic and structural response of Petunia × hybrida (Solanaceae) to the application of brassinosteroids. Bonplandia [online]. 2022, vol.31, n.2, pp.103-114. ISSN 0524-0476.  http://dx.doi.org/10.30972/bon.3125931..

The Argentine floriculture presents a challenge that includes the improvement of production through the use of organic compounds. Phytohormones, such as brassinosteroids (BRs), are a promising alternative. The objective of this work was to evaluate the agronomic response and structural changes inPetunia × hybridaleaf against the application of BRs. Dreams® Series seedlings were transplanted into pots, after 15 days the application of the first dose of BRs EP24 and BB16 was carried out. The second application was made after 20 days. For the agronomic analysis the following were evaluated: greenness index, biomass, foliar area and number of flowers; for structural changes: stomatal closure, deposition of callose and lignin. Results showed that plants treated with BB16 and EP24 showed higher biomass production in relation to absolute controls. Plants treated with EP24 showed an increase in the number of flowers, less stomatal opening, and greater deposition of callose and lignin in the vascular bundles of the main nerve. BRs could be used in the cultivation ofPetunia × hybrida, as a biotechnological alternative to improve flower production, promoting plant growth and reducing the use of synthetic fertilizers.

Palavras-chave : Brassinosteroids; floriculture; Petunia.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )