Data/hora: 23/05/2024 19:01:46

Provedor de dados: | Anais da Academia Brasileira de Ciências
País: | Brazil
Título: | Are sun- and shade-type anatomy required for the acclimation of Neoregelia cruenta?
Autores: | REINERT,FERNANDA; LEAL-COSTA,MARCOS V.; JUNQUEIRA,NICIA E.; TAVARES,ELIANA S.
Data: | 2013-06-01
Ano: | 2013
Palavras-chave: | Bromeliaceae; Crown architecture; Leaf anatomy; Plant morphology.
Resumo: | Sun and shade plants are often discriminated by a number of sun- and shade-type anatomies. Nonetheless, we propose that among tank-bromeliads, changes in rosette architecture satisfy the requirements for coping with contrasting light levels. The tank-bromeliad Neoregelia cruenta naturally colonises sub-habitats ranging from full exposure to direct sunlight, to shaded environments in sand ridge plains. We quantified anatomical and morphological traits of leaves and rosettes of N. cruenta grown under sun and shade conditions. Cells with undulated lateral walls within the water parenchyma are for the first time described for the family. Under high light, leaf blades were wider, shorter, and yellowish. The rosette diameter of sun plants was less than half that of shade plants. Sun leaves overlapped with neighbouring leaves for most of their length, forming a cylindrical rosette where water accumulates. Shade leaves only overlapped in the centre of the rosette. Most anatomical traits were similar under both growth conditions. Stomata were absent from the base of sun leaves, which is probably explained by limited gas exchange at the base of the tight sun-type rosette. Data suggest that the ability of N. cruenta to acclimate to sun and shade is better explained by changes in rosette architecture than by leaf anatomy.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200561
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/S0001-37652013005000034
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.85 n.2 2013
Fonte: | info:eu-repo/semantics/openAccess