Emergência de plântulas de melancieira triploide por tempo embebição e concentrações de ácido giberélico

Carlos Augusto Mota Soares; Francisco Hevilásio Freire Pereira; Francisco de Assis da Silva; Ancélio Ricardo de Oliveira Gondim; Mirandy dos Santos Dias; Marcelo Cleón de Castro Silva; José Ebson Janoca de Souza

doi:10.18378/rvads.v19i4.11273

Authors

Carlos Augusto Mota Soares Universidade Federal de Campina Grande https://orcid.org/0009-0006-3545-5488
Francisco Hevilásio Freire Pereira Universidade Federal de Campina Grande https://orcid.org/0000-0001-5557-3226
Francisco de Assis da Silva Universidade Federal de Campina Grande https://orcid.org/0000-0003-4558-1147
Ancélio Ricardo de Oliveira Gondim Universidade Federal de Campina Grande https://orcid.org/0000-0002-3093-6833
Mirandy dos Santos Dias Universidade Federal de Campina Grande https://orcid.org/0000-0002-0160-6069
Marcelo Cleón de Castro Silva Universidade Federal de Campina Grande https://orcid.org/0000-0003-2429-9214
José Ebson Janoca de Souza Universidade Federal de Campina Grande https://orcid.org/0009-0004-6423-1534

DOI:

https://doi.org/10.18378/rvads.v19i4.11273

Keywords:

Citrullus lanatus, Plant hormone, Gibberellin, Germination, Integumentary dormancy

Abstract

One of the main problems faced by producers who grow triploid watermelon is the low germination percentage of their seeds during crop establishment. Thus, this present study aims to evaluate the effect of gibberellic acid (GA₃) concentration and water imbibition period on the emergence and growth of triploid watermelon seedlings. The experiments were conducted at the Plant Physiology Laboratory and Greenhouse of the Academic Unit of Agricultural Sciences belonging to the Federal University of Campina Grande, Pombal, Paraíba, using the 'Lola' watermelon hybrid. In Experiment I, treatments consisted of four GA3 concentrations (0, 200, 400, 800 mg L^-1). In Experiment II, treatments consisted of four water imbibition period (0, 6, 12, 24 h). The experimental design was completely randomized, with three replications of 25 seeds. After treatment application, seeds were sown in polypropylene trays. Increased plant height and reduced watermelon seed germination were observed with increasing GA₃ concentration. For imbibition period, there was a 23.3% increase in emerged plants when soaked for 24 hours compared to the control. GA₃ did not improve germination in triploid watermelon seeds. The water imbibition response is related to physical limitations in the seed coat not clarified in this study.

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References

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