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Seed germination of Hesperozygis ringens (Benth. ) Epling, an endemic and threatened species
Leite, Leandro Gonçalves; Stefanello, Raquel; Essi, Liliana.
  • Leite, Leandro Gonçalves; Universidade Federal de Santa Maria. Centro de Ciências Naturais e Exatas. Departamento de Biologia. Santa Maria. BR
  • Stefanello, Raquel; Universidade Federal de Santa Maria. Centro de Ciências Naturais e Exatas. Departamento de Biologia. Santa Maria. BR
  • Essi, Liliana; Universidade Federal de Santa Maria. Centro de Ciências Naturais e Exatas. Departamento de Biologia. Santa Maria. BR
Acta sci., Biol. sci ; 44: e58431, mar. 2022. ilus, tab, graf
Article in English | LILACS, VETINDEX | ID: biblio-1391277
ABSTRACT
Hesperozygis ringens (Lamiaceae), popularly known as espanta-pulga, is a threatened species endemic to rocky and sandy regions of the Pampa biome. One factor that can influence the low number of individuals of a species is a low seed germination rate influenced by temperature and/or light. Thus, the objective of this study was to evaluate the influence of light and temperature on the seed germination of H. ringens. The seeds of two lots were sown on a paper substrate and maintained in BOD chambers at temperatures of 15, 20, 25 and 30ºC in the presence and absence of light. The germination speed rate was evaluated every 3 days for 21 days. The experiment was completely randomized with treatments that had a 4 x 2 factorial design. The first visible sign (protrusion of the primary root) of germination was observed seven days after sowing. Germination occurred both in the presence and absence of light and the lowest temperatures significantly influenced the germination process and germination speed. For germinating the species, 15°C was the most favorable temperature compared to 20, 25 and 30°C. It can be concluded that a temperature of 15ºC favors the germination process of H. ringens seeds, which are insensitive to light.(AU)
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Seeds / Temperature / Germination / Lamiaceae / Light Signal Transduction Type of study: Controlled clinical trial Language: English Journal: Acta sci., Biol. sci Year: 2022 Type: Article Institution/Affiliation country: Universidade Federal de Santa Maria/BR

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Full text: Available Index: LILACS (Americas) Main subject: Seeds / Temperature / Germination / Lamiaceae / Light Signal Transduction Type of study: Controlled clinical trial Language: English Journal: Acta sci., Biol. sci Year: 2022 Type: Article Institution/Affiliation country: Universidade Federal de Santa Maria/BR