Temperatura e substrato para germinação de sementes de flor-de-maio (Schlumbergera truncata (Haw.) Moran)

Abstract

Temperature and substrate for germination of Christmas Cactus (Schlumbergera truncata (Haw.) Moran)Schlumbergera truncata is a cacti of epiphytic habit known popularly as Christmas Cactus, Thanksgiving Cactus or Crab Cactus, Zygocactus. It is an ornamental plant cultivated in vases and highly appreciated for the beauty of their flowers. The objective of this work was to evaluate the effect of temperature and of substrate on seed germination of S. truncata. The substrates used in the experiment included: blotting paper, sand of medium granulation, charred rice peel and triturated cane pulp. The tested temperatures were 20, 25 and 30 o C. The analyzed variables were: germination percentage, index of germination speed and average germination time. The highest germination percentages were recorded at 20 o C and 25 o C for paper, sand and charred rice peel. Charred rice peel showed the highest index of germination speed and the lowest average germination time. In conclusion, temperature at 20 o C and the substrate charred rice peel showed the best results for seed germination of S. truncata and cane pulp was not a suitable substrate for the germination of the species. Temperatura e substrato para germinação de sementes de flor-de-maio (Schlumbergera truncata (Haw.) Moran)

Physical characterization of Rhipsalis (Cactaceae) fruits and seeds germination in different temperatures and light regimes

“…In relation of daily frequency of germination, similar results were obtained by Lone et al (2010), with the cactus epiphyte Schlumbergera truncata, where the onset of germination was observed between the 5 th (temperatures of 20 and 25 °C) and 7 th days (30 °C), with the end of germination between 22 (to 20 °C) to 26 days (at 30 °C). The germination behavior similar for different species of cacti can be related to the common epiphytic habit shared by them.…”

“…In a study of epiphytic (Bromeliaceae, Orchidaceae e Cactaceae) in the Reserva do Parque do Zizo, São Miguel Arcanjo, São Paulo, França (2003), found that an increased occurrence of epiphytic was in places that had temperatures between 18 and 21 °C. Lone et al (2010) evaluated the germination of epiphytic cactus Schlumbergera truncata and concluded that a temperature of 20 °C was the most suitable for germination of this species. Also according to the authors, the temperature of 30 °C was not favorable for germination percentage, for the GSI and ATG of this species, as observed in this study.…”

Temperatura na germinação de sementes de genótipos de pitaya

“…Segundo Carvalho e Nakagawa (2000), a germinação só ocorre dentro de determinados limites de temperatura, nos quais existe uma temperatura ótima, ou faixa de temperatura na qual o processo ocorre com a máxima eficiência, obtendo-se o máximo de germinação no menor período possível. Diversos autores verificaram que a temperatura ótima para a germinação de sementes de diversas espécies de cactos é, normalmente, em torno de 25 o C (NOBEL, 1988;ROJAS-ARÉCHIGA;VÁZQUEZ-YANES, 2000;LONE et al, 2007), podendo ocorrer exceções, como para o cacto colunar Oreocereus trolii, que apresenta temperatura ótima à 15 o C (ZIMMER, 1969), para Schlumbergera truncata (flor-de-maio) na qual a temperatura ótima é 20 ºC (LONE et al, 2010) e Pereskia aculeata, um cacto com folhas e porte primitivo, que apresenta germinação ótima à 33 o C (DAU; LABOURIAU, 1974). …”

“…As temperaturas ótimas para a germinação de sementes de cactos variam com a espécie, sendo de 20 ºC para Schlumbergera truncata (flor-de-maio) (LONE et al, 2010), 25 ºC para Melocactus bahiensis (coroa-de-frade) (LONE et al, 2007), e 30 ºC para Cereus jamacaru (Mandacaru) (GUEDES et al, 2009 Para a extração das sementes empregou-se o processo de fermentação da polpa por 48 horas, em solução de água + açúcar 2,5%. Após esse período, a solução foi peneirada em água corrente de modo a eliminar os resíduos da polpa e reter somente as sementes as quais foram colocadas para secar à sombra, sobre papel de filtro, durante 48 horas em temperatura ambiente.…”

Optimal conditions for germination of seeds of Epiphyllum oxypetalum

“…Other studies show that both 20 and 25°C are favorable for certain species, since the better performance was observed at 25°C in two cactaceous species, Melocactus bahiensis (Britton and Rose) and Schlumbergera truncate (Haw.) Moran (Lone et al, 2007(Lone et al, , 2010. By contrast, Almeida (2008) evaluated the germination of Cereus fernambucensis Lem., other cactaceous species, and found that 20°C provided the best germination, result that agrees with those obtained in the present study ( Table 2).…”