Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/6800
Título: Caracterização anatómica da casca de Eucalyptus nitens (Deane & Maiden) e Eucalyptus rudis Endl. para identificação das espécies
Autor: Patrício, Helena Sofia Maurício
Orientador: Pereira, Helena Margarida Nunes
Santos, Teresa Quilhó Marques dos
Palavras-chave: Eucalyptus nitens
Eucalyptus rudis
bark
anatomy
cell dimensions
cell type proportions
Data de Defesa: 2014
Editora: ISA
Citação: Patrício, H.S.M. - Caracterização anatómica da casca de Eucalyptus nitens (Deane & Maiden) e Eucalyptus rudis Endl. para identificação das espécies. Lisboa: ISA, 2014, 86 p.
Resumo: The bark of 5 trees of E. nitens with 4 and 10 years of age, and 5 trees of E. rudis with 4 years of age was analyzed. The qualitative characterization and the determination of the tissue proportions were made on histological thin sections and quantitative characterization on dissociated elements; the dimension of fibres, axial parenchyma and expanded cells was also determined. The species showed: reduced rhytidome, periderm composed by phellem with suberised and lignified cells and phelloderm; non-collapsed phloem with tangential layers with axial parenchyma alternating with sieve tube elements and fibre bundles; the collapsed phloem is characterized by the change of the parenchyma cells and sclereids. The length, width and wall thickness of fibers was in 4-year-old E. nitens 0.90 mm; 16.2 μm and 4.7 μm; in 10-year-old E. nitens 1.05 mm; 17.8 μm and 5.2 μm and E. rudis 0.84 mm; 21 μm and 6 μm respectively. The expanded axial parenchyma cells are the most abundant phloem tissue (38-48%) in both species; the percentage of fibers was higher in E. nitens (33%). The species differed in the type of periderm, in the arrangement of the expanded cells and in the occurrence of secretory cavities.
Descrição: Mestrado em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/6800
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis



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