Data/hora: 08/06/2024 18:53:24

Provedor de dados: | 88
País: | Brazil
Título: | Morphology, reproduction and development of Hypoglossum hypoglossoides (Stackhouse) Collins &amp;amp; Hervey (Ceramiales, Rhodophyta) from the south and southeastern Brazilian coast
Autores: | Horta,Paulo A.; Yokoya,Nair S.; Guimarães,Silvia M.P.B.; Bacci,Denise S.; Oliveira,Eurico C.
Data: | 2003-12-01
Ano: | 2003
Palavras-chave: | Delesseriaceae; Development; Hypoglossum hypoglossoides; Reproduction; Rhodophyta.
Resumo: | Hypoglossum hypoglossoides (Stackhouse) Collins &amp;amp; Hervey is reported for the first time from the infralittoral of São Paulo and Santa Catarina states. The species was already reported to the states of Rio de Janeiro, Espírito Santo and Bahia as Hypoglossum tenuifolium (Harvey) J. Agardh var. carolinianum Williams. A detailed description of the morphology and reproduction is given based on field-collected material. Unialgal cultures were initiated from tetraspore germination, and growth rates of gametophytes were determined under different conditions of temperature, photoperiod and irradiance. Gametophytes grew well between 15 to 30 ºC, 14L:10D and 10L:14D photoperiods and irradiance from 20 to 120 µmol photons.m-2.s-1, but presented low percentage of fertile plants in low temperature (15 ºC). Gametophytes cultured in laboratory developed only male reproductive structures. Physiological responses of H. hypoglossoides indicate that the species is well adapted to temperature and light variations which could explain its range of vertical (6-26 m depth) and latitudinal distribution (from Fernando de Noronha to Santa Catarina) as well as the absence of sexual reproduction in the southern limit of its distribution.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042003000400004
Editor: | Sociedade Botânica de São Paulo
Relação: | 10.1590/S0100-84042003000400004
Formato: | text/html
Fonte: | Brazilian Journal of Botany  v.26 n.4 2003
Fonte: | info:eu-repo/semantics/openAccess