SciELO - Scientific Electronic Library Online

vol.6 issue4Nematóides das galhas, Meloidogyne spp., associados ao parasitismo de plantas na região amazônica. I - No Estado do Pará.Uma espécie única de Maprounea (Euphorbiaceae) na América do Sul author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Acta Amazonica

Print version ISSN 0044-5967On-line version ISSN 1809-4392


LLERAS, Eduardo. Sobre parâmetros eco-fisiológicos das folhas. I - Considerações básicas. Acta Amaz. [online]. 1976, vol.6, n.4, pp.409-416. ISSN 0044-5967.

In this initial paper of a series on physio-ecological parameters in leaves, some basic aspects of foliar morphology and anatomy are considered in relation to environmental conditions, the main evolutionary stages that gave rise to leaves are analized. The basic morphology and anatomy of leaves is traced throughout the evolutionary history of plants, from a postulated Rhynia-like ancestor to the more recent (in an evolutionary sense) types of leaves. Some of the problems and selective pressutes that might help elucidate and interpret leaves from a physio-ecological stand point are analized. Also considered is the possible influence, in view of current data, that leaves might have on the structure of the stele. Some of the basic factors that might excert selective pressure, such as temperature, light and water are also considered.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )