<abstract xmlns="http://www.w3.org/1999/xhtml">

Brazil is home to a great diversity of species of the genus <italic>Dyckia.</italic> However, many of these species are threatened due to habitat destruction and predatory exploitation. An alternative to conserving these plants is sexual propagation using plant regulators to stimulate germination. Gibberellic acid (GA3) is an effective regulator in this process, but its instability and ease of degradation pose challenges. Therefore, nanoencapsulation of GA3 could be used to protect the molecule and allow controlled release. In this study, the effects of different doses of GA3 were evaluated on the germination of four species: <italic>D. cabrerae, D. dusenii, D. pottiorum</italic> and <italic>D. walteriana.</italic> The first stage consisted of soaking the seeds in different concentrations of GA3, in which the species <italic>D. dusenii</italic> and <italic>D. walteriana</italic> showed significant responses to GA3, with an increase from 35% to more than 60% germination. However, the species <italic>D. cabrerae</italic> and <italic>D. pottiorum</italic> responded positively to GA3 only in vegetative growth parameters. In the second stage, the use of nanoparticles of alginate/chitosan (NP ALG/CS) and chitosan/tripolyphosphate (NP CS/TPP) containing GA3 was compared with free GA3 and with NPs without GA3. It was verified that the use of nanoencapsulated GA3 resulted in a more efficient germination response in <italic>D. walteriana</italic> seeds, using smaller doses of the regulator (between 0.75 mg · L−1 and 1.0 mg · L−1), mainly with the ALG/ CS NPs. Therefore, the use of GA3 is recommended for <italic>D. dusenii</italic> and <italic>D. walteriana</italic>, and for the latter, nanoparticles containing ALG/CS-GA3 allow a reduction in the required dose.
</abstract>

Brazil is home to a great diversity of species of the genus Dyckia. However, many of these species are threatened due to habitat destruction and predatory exploitation. An alternative to conserving these plants is sexual propagation using plant regulators to stimulate germination. Gibberellic acid (GA3) is an effective regulator in this process, but its instability and ease of degradation pose challenges. Therefore, nanoencapsulation of GA3 could be used to protect the molecule and allow controlled release. In this study, the effects of different doses of GA3 were evaluated on the germination of four species: D. cabrerae, D. dusenii, D. pottiorum and D. walteriana. The first stage consisted of soaking the seeds in different concentrations of GA3, in which the species D. dusenii and D. walteriana showed significant responses to GA3, with an increase from 35% to more than 60% germination. However, the species D. cabrerae and D. pottiorum responded positively to GA3 only in vegetative growth parameters. In the second stage, the use of nanoparticles of alginate/chitosan (NP ALG/CS) and chitosan/tripolyphosphate (NP CS/TPP) containing GA3 was compared with free GA3 and with NPs without GA3. It was verified that the use of nanoencapsulated GA3 resulted in a more efficient germination response in D. walteriana seeds, using smaller doses of the regulator (between 0.75 mg · L−1 and 1.0 mg · L−1), mainly with the ALG/ CS NPs. Therefore, the use of GA3 is recommended for D. dusenii and D. walteriana, and for the latter, nanoparticles containing ALG/CS-GA3 allow a reduction in the required dose.

Enhanced germination of seeds native to Brazil: A comparative analysis between free and nanoencapsulated gibberellic acid in <italic>Dyckia</italic> sp. (Bromeliaceae)

Folia Horticulturae

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Enhanced germination of seeds native to Brazil: A comparative analysis between free and nanoencapsulated gibberellic acid in  sp. (Bromeliaceae)

Brazil is home to a great diversity of species of the genus Dyckia. However, many of these species are threatened due to habitat destruction and predatory...

Enhanced germination of seeds native to Brazil: A comparative analysis between free and nanoencapsulated gibberellic acid in Dyckia sp. (Bromeliaceae)

Article Category: ORIGINAL ARTICLE

Publié en ligne: 31 déc. 2023

Pages: 403 - 418

Reçu: 14 août 2023

Accepté: 23 oct. 2023

DOI: https://doi.org/10.2478/fhort-2023-0029

Mots clés
bromeliads, domestication, gibberellins, nanotechnology, plant growth regulators

© 2023 Jean Carlo Baudraz de Paula et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Enhanced germination of seeds native to Brazil: A comparative analysis between free and nanoencapsulated gibberellic acid in Dyckia sp. (Bromeliaceae)

Article Category: ORIGINAL ARTICLE

Publié en ligne: 31 déc. 2023

Pages: 403 - 418

Reçu: 14 août 2023

Accepté: 23 oct. 2023

DOI: https://doi.org/10.2478/fhort-2023-0029

Mots clésbromeliads, domestication, gibberellins, nanotechnology, plant growth regulators

© 2023 Jean Carlo Baudraz de Paula et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
bromeliads, domestication, gibberellins, nanotechnology, plant growth regulators