Seed germination of Hesperozygis ringens (Benth. ) Epling, an endemic and threatened species
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)
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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