Temperatura e métodos de superação da dormência na germinação de sementes de Banisteriopsis campestris (A. Juss.) Little

Ana Mayra Pereira da Silva; Amanda Ribeiro Correa; Cárita Rodrigues de Aquino Arantes; Luciana Alves Martins; Anna Alice Lima Miguel; Elisangela Clarete Camili

doi:10.53661/1806-9088202650263958

Authors

Ana Mayra Pereira da Silva Universidade Federal do Estado do Mato Grosso, Programa de Pós-Graduação em Agricultura Tropical, Cuiabá, MT, Brasil https://orcid.org/0000-0002-5643-2692
Amanda Ribeiro Correa Universidade Federal do Estado do Mato Grosso, Doutora em Agricultura Tropical, Cuiabá, MT, Brasil https://orcid.org/0000-0002-2468-6073
Cárita Rodrigues de Aquino Arantes Universidade Federal do Estado do Mato Grosso, Doutora em Agricultura Tropical, Cuiabá, MT, Brasil https://orcid.org/0000-0003-1148-4517
Luciana Alves Martins Universidade Federal do Estado do Mato Grosso, Programa de Pós-Graduação em Agricultura Tropical, Cuiabá, MT, Brasil https://orcid.org/0000-0002-2975-9374
Anna Alice Lima Miguel Universidade Federal do Estado do Mato Grosso, Programa de PósGraduação em Agricultura Tropical, Cuiabá, MT, Brasil https://orcid.org/0009-0003-9833-477X
Elisangela Clarete Camili Universidade Federal do Estado do Mato Grosso, Doutora em Horticultura, Cuiabá, MT, Brasil https://orcid.org/0000-0002-4642-2511

DOI:

https://doi.org/10.53661/1806-9088202650263958

Keywords:

Malpighiaceae, Physical dormancy, Rosinha

Abstract

Seed germination is a physiological process strongly influenced by environmental factors, particularly temperature, which regulates both germination speed and percentage. Dormancy, however, can hinder seedling emergence even under apparently favorable environmental conditions. This study evaluated the germination and vigor of Banisteriopsis campestris (A. Juss.) Little seeds under different temperatures (15, 20, 25, 30, and 35 °C) and dormancy-breaking methods (mechanical scarification with sandpaper, wing cutting, immersion in hot water for 1 minute at 70, 80, and 90 °C, and imbibition at 20°C and 30 °C for 24 hours). The experiment was conducted between September and December 2017. Scarification accelerated initial imbibition, whereas intact seeds absorbed water more slowly. Germination was highest at 25 °C, which also resulted in the highest germination speed index (GSI). Extreme temperatures (15°C and 35 °C) significantly reduced both parameters. Among dormancy-breaking treatments, immersion in water at 70 °C for 1 minute yielded the highest germination percentage. GSI was higher in scarified seeds and in those imbibed at 20°C and 30 °C for 24 hours. Seed quality assessment showed a high proportion of empty seeds, with no significant differences among treatments, and higher mortality following sandpaper scarification. The highest residual dormancy was observed in seeds immersed in water at 90 °C.

Keywords: Malpighiaceae, Physical dormancy, Rosinha