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Effects of simulated acid rain on leaf anatomy and micromorphology of Genipa americana L. (Rubiaceae)
Provedor de dados: 52
Autores: Sant'Anna-Santos,Bruno Francisco; Silva,Luzimar Campos da; Azevedo,Aristéa Alves; Aguiar,Rosane.
Experiments were conducted in order to characterize the injuries on leaf structure and micromorphology of G. americana and evaluate the degree of susceptibility of this species to simulated acid rain. Plants were exposed to acid rain (pH 3.0) for ten consecutive days. Control plants were submitted only to distilled water (pH 6.0). Leaf tissue was sampled and fixed for light and scanning electron microscopy. Necrotic interveinal spots on the leaf blade occurred. Epidermis and mesophyll cells collapse, hypertrophy of spongy parenchyma cells, accumulation of phenolic compounds and starch grains were observed in leaves exposed to acid rain. The micromorphological analysis showed, in necrotic areas, plasmolized guard cells and cuticle rupture. Epidermal and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genipa americana; Simulated acid rain; Leaf anatomy; Leaf micromorphology.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000300017