Data/hora: 12/06/2024 09:10:41

Provedor de dados: | 42
País: | Brazil
Título: | The effect of temperature on the germination of Melocactus violaceus Pfeiff. (Cactaceae), a threatened species in restinga sandy coastal plain of Brazil
Autores: | ZAMITH,LUIZ R.; CRUZ,DENISE D.; RICHERS,BARBARA T.T.
Data: | 2013-06-01
Ano: | 2013
Palavras-chave: | Cactaceae; Conservation; Germination; Melocactus violaceus; Restinga; Temperature.
Resumo: | Melocactus violaceus is an endangered species due to habitat destruction and the overcollection of this species for ornamental use. The aim of this study was to test the effect of different temperatures on the germination of M. violaceus. Three treatments were conducted: a constant temperature of 25ºC, a 20-35ºC alternating temperature, both inside germination chamber, and an alternating temperature under room temperature (mean temperature ranged from 25-37ºC). The final seed germination rates at the alternating temperature treatments were not significantly different (65% in the seed germinator and 62.5% at room condition). However, both treatments with alternating temperatures had significantly higher germination rates compared to the treatment kept at the constant temperature (8%). Our study showed that alternating temperatures between 20 and 37ºC provides satisfactory conditions to induce a high percentage of seed germination of M. violaceus, without the passage of seeds through the digestive tract of its natural disperser, the lizard Tropidurus torquatus. This condition contributes to efficiently producing seedlings that can be reintroduced into conservation areas or used as ornamentals that may help reduce the overcollection of the remaining native populations.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200615
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/S0001-37652013000200010
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.85 n.2 2013
Fonte: | info:eu-repo/semantics/openAccess