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Growth and accumulation of storage reserves by somatic embryos of Ocotea catharinensis Mez. (Lauraceae)
- Claudete Santa Catarina, Á. M. Randi, A. M. Viana
- BiologyPlant Cell, Tissue and Organ Culture
- 1 July 2003
Analysis of in vitro growth of embryogenic cultures of Ocotea catharinensis Mez.
Effects of sucrose and irradiance on germination and early gametophyte growth of the endangered tree fern Dicksonia sellowiana Hook (Dicksoniaceae)
It is an endangered tree fern that grows in mixed umbrophylus forests in the tropics and the effect of different irradiance on the germination and early gametophyte development of D. sellowiana was analyzed in the autumn of 1998.
Light and storage on the germination of spores of Dicksonia sellowiana (Presl.) Hook., Dicksoniaceae
Os esporos de Dicksonia sellowiana sao fotoblasticos positivos e atingem a maxima porcentagem de germinacao a 23 ± 2°C em luz branca apos sete dias de embebicao. A fase de pre-inducao para esporos…
Cryopreservation of spores of Dicksonia sellowiana: an endangered tree fern indigenous to South and Central America.
Cryopreservation seems to promote germination of some dormant spores of D. sellowiana.
Pleopeltis pleopeltifolia (Polypodiopsida, Polypodiaceae), a poikilochlorophyllous desiccation-tolerant fern: anatomical, biochemical and physiological responses during water stress
Frond anatomy and physiological changes associated with desiccation and rehydration of P. pleopeltifolia were analysed and a significant increase in sugar content in fronds was noticeable during Desiccation, which may favour a possible osmotic adjustment and vitrification.
Spore germination of Gleichenella pectinata (Willd.) Ching (Polypodiopsida-Gleicheniaceae) at different temperatures, levels of light and pH
This study investigated the effects of different temperatures, light levels, and pH on the spore germination of Gleichenella pectinata and found that the rate of and gametophyte development were generally very low.
Aspects of Gametophyte Development of Dicksonia sellowiana Hook (Dicksoniaceae): an Endangered Tree Fern Indigenous to South and Central America
Abstract With the purpose of providing a basis for programs of sustainable management in the conservation of this endangered species, this paper presents morphological aspects on the gametophyte…
Variability in the germination of spores among and within natural populations of the endangered tree fern Dicksonia sellowiana Hook. (Xaxim)
Foi observada uma maior variacao intrapopulacional para a germinacao e porcentagem de esporos inviaveis e resultados sugerem a existencia of estrategias adaptativas that favorecem a entrada gradual e continua de novos individuos na populacao de gametofitos.
Mobilization of storage reserves duringCyathea delgadii spore germination
The majority of spores ofCyathea delgadii germinate during the first seven days after imbibition under constant white light, but the dry weight decreases, and there is a drastic reduction in the amount of lipids.
Water stress and abscisic acid treatments induce the CAM pathway in the epiphytic fern Vittaria lineata (L.) Smith
Findings suggest that V. lineata could change its mode of carbon fixation from C3 to the CAM pathway in response to drought, and the concentrations of carotenoids were stable.