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vol.8 issue3Amarantáceas: Nova opção de espinafres tropicais para a AmazôniaEstudos da flora orquidológica do Estado do Amazonas. III-X Brassocattleya rubyi Braga (Orchidaceae) híbrido natural novo da flora amazônica author indexsubject indexarticles search
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Acta Amazonica

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


LEITE, Angela Ma. C.  and  LLERAS, Eduardo. Ecofisiologia de plantas da Amazônia1-Anatomia foliar e ecofisiologia de Pogonophora schomburgkiana Miers. (Euphorbiaceae). Acta Amaz. [online]. 1978, vol.8, n.3, pp.365-370. ISSN 0044-5967.

The hypothesis that the more exposed the strata of a tree, the more xeric the conditions and thus the more xeroscleromorphic the structure of the leaves was here tested using Pogonophora schomburgkiana. It was found that from the base to the canopy of the tree, the number of stomata/mm2 increased, the mesophyll became thicker, and the leaves decreased in size, these among other characters, that indicate xerophylly. All of these character changes support the hypothesis tested.

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