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Beilschmiedia rigida (Mez) Kosterm. (Lauraceae): diferenciação e desenvolvimento da lâmina foliar

Carlos Alexandre Marques, Cláudia Franca Barros and Cecilia Gonçalves Costa
Rodriguésia
Vol. 55, No. 84 (2004), pp. 89-100
Stable URL: http://www.jstor.org/stable/23497133
Page Count: 12
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Beilschmiedia rigida (Mez) Kosterm. (Lauraceae): diferenciação e desenvolvimento da lâmina foliar
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Abstract

Neste trabalho descreve-se o desenvolvimento da lâmina foliar de Beilschmiedia rigida (Mez) Kosterm., desde o surgimento do primórdio foliar no ápice vegetativo até sua completa expansão. São apontadas características como — presença de tricomas apenas nas folhas jovens; ocorrência de projeções parietais e invaginações protoplasmáticas nas paredes anticlinais e periclinais das células epidérmicas; estômatos paracíticos de origem mesoperígena; hipoderme em três estratos na face adaxial e em apenas um na face abaxial da lâmina foliar e células secretoras que surgem nos primeiros estágios de diferenciação da folha assim como idioblastos cristalíferos em grupos. The differentiation and development of leaves of Beilschmiedia rigida from the leaf primordium to the complete leaf expansion are described. Characteristics as — presence of trichomes in young leafs only, occurrence of walls and protoplasmic projections in the anticlinal and periclinal walls of epidermal cells, paracitic stomata of mesoperiginous origin; three layers of hipodermis in the adaxial face and one layer in the abaxial face of leaf blade and secretory cells and cristaliferous idioblasts groups that arises in the leaf primordium were pointed.

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