Conservation of diaspore from Schlechtendalia luzulifolia Less. (Asteraceae)
Abstract
This study aimed to analyze the emergence of Schlechtendalia luzulifolia in two stages of maturation and conservation of seeds in dry and cold chamber. Diaspores were collected from two populations, in Porto Alegre and Tapes municipalities in Rio Grande do Sul State, Brazil. Cypselae of Porto Alegre access were collected in two stages of maturation: cypselae attached (CA) and abscised cypselae (AC), while cypselae from Tapes were collected in CA stage. Tests of viability with tetrazolium salt were done, as well as germination in different thermic regimes and storage in different environments (camera cold and dry). Regardless of the maturity, the diaspores presented viability around 61 to 77 %. The harvest of AC allowed greater seedling emergence. The highest percentage of emergency and the lowest mean time to emergence occurred at constant temperature of 20 °C. For the preservation of the seeds, the dry chamber environment (17 °C and 45 % of relative humidity) was more appropriate.
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