Morfologia de frutos e sementes de algumas espécies arbóreas utilizadas para o reflorestamento no entorno de hidrelétricas

• Autor(a) principal: Sant'Ana, Vanessa Zaffani [UNESP]
• Data de Publicação: 2016
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/155636; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2017-06-20/000886778.pdf
• topic: Arvores; Botânica - Morfologia; Variação (Biologia); Botany Morphology

The morphological characterization of fruits and seeds of native tree species is indispensable for the formulation of reforestation plans for areas impacted by the construction of hydroelectric power plants, because it provides data relevant to the conservation of species, such as the identification of their ecological aspects. The objective of this study was characterize the fruits and seeds morphology of 15 native tree species and the variations of these species based on morphological traits. Were used ten fruits for each species, of which nine morphological traits of fruit and seeds (length, width, thickness of fruit, number of seeds per fruit, mass of fruits, length, width, thickness of seed and mass of 100 seeds) were analyzed, by descriptive statistic, estimating the averages, the coefficient of variation, the skewness and kurtosis. Was ordained the average values of each traits, according to the Scott-Knott test at 5% probability, considering the randomized block design with 15 species (treatments) and 10 fruits per species (repetitions). For the multivariate analysis, grouping techniques were used, the method of Tocher and analysis of the Mahalanobis distance. Was verified that the distribution of fruit and seed morphology for the species studied was not random (symmetric and mesocuric), allowing to infer that the causes of this distribution are genetic and environmental factors. The univariate analyzes allowed to distinguish six groups in relation to the biometry of fruits and seeds of the species, indicating the presence of variability in this set of traits. The species Handroanthus impetiginosus was the one that most differentiated among the studied ones, being that its group has the greater divergence for the set of morphological traits of the fruits and seeds in relation to the first group, composed of ten species. Numbers of variable groups were observed, by traits, in the multivariate analysis, highlighting the fruit thickness...