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Australian Journal of Botany Australian Journal of Botany Society
Southern hemisphere botanical ecosystems
RESEARCH ARTICLE

How temperature, substrate, and stratification periods influence Ilex paraguariensis embryonic development

Manoela Mendes Duarte https://orcid.org/0000-0002-9205-6209 A B * , Letícia Siqueira Walter https://orcid.org/0000-0001-9352-3369 A , Mônica Moreno Gabira https://orcid.org/0000-0001-8755-9496 A , Cléberson Porath https://orcid.org/0000-0002-5929-0298 A , Elisa Serra Negra Vieira https://orcid.org/0000-0002-0799-7654 B , Antonio Carlos Nogueira https://orcid.org/0000-0001-7060-3438 A , Ivar Wendling https://orcid.org/0000-0002-1008-6755 B and Dagma Kratz https://orcid.org/0000-0002-3062-424X A
+ Author Affiliations
- Author Affiliations

A Universidade Federal do Paraná, Departamento de Ciências Florestais e da Madeira, Curitiba, Paraná, Brazil.

B Embrapa Florestas – Empresa Brasileira de Pesquisa Agropecuária, Colombo, Paraná, Brazil.

* Correspondence to: manu.florestal@gmail.com

Handling Editor: Chris Blackman

Australian Journal of Botany 71(5) 269-273 https://doi.org/10.1071/BT23010
Submitted: 28 January 2023  Accepted: 30 May 2023   Published: 16 June 2023

© 2023 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Aiming to develop a new stratification protocol for yerba mate seeds, we evaluated how different combinations of temperature, substrate, and period influence the embryonic development of the species, compared to fresh seeds and conventionally stratified seeds. We measured the seeds’ moisture content and performed a tetrazolium test to evaluate embryo viability and embryonic development. Seeds’ initial moisture content was 10.1% and reached 40.6% after stratification. We observed more embryos in advanced development stages after stratification in all treatments, indicating that the protocols used were adequate for the species and have a great potential to be explored for yerba mate seedling.

Keywords: seed development, seed dormancy, seed germination, seed viability, seminal propagation, stratification protocol, tetrazolium test, yerba mate.


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