DRYING PERIODS ON THE PHYSIOLOGICAL QUALITY OF Licania rigida Benth SEEDS/PERIODOS DE SECAGEM NA QUALIDADE FISIOLOGICA DE SEMENTES DE Licania rigida Benth

The oiticica (Licania rigida Benth) is a perennial tree species, oilseed, which has great importance in the semiarid region of Northeastern Brazil by preserving the river margins and the temporary stream. Due to the lack of information regarding the desiccation of oiticica seeds, the study aimed to...

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Bibliographic Details
Published in:Ciência florestal Vol. 28; no. 4; p. 1798
Main Authors: Brandao, Eliane Duarte, Neto, Manoel Alexandre Diniz, de Araujo, Luciana Rodrigues, da Silva, Ivandro de Franca, Barbosa, Wagner Magno Catao, Maioli, Maria Gabriela Souza
Format: Journal Article
Language:Portuguese
Published: Universidade Federal de Santa Maria 01-10-2018
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Summary:The oiticica (Licania rigida Benth) is a perennial tree species, oilseed, which has great importance in the semiarid region of Northeastern Brazil by preserving the river margins and the temporary stream. Due to the lack of information regarding the desiccation of oiticica seeds, the study aimed to evaluate the physiological quality of its seeds submitted to different drying periods. The experimental design was completely randomized and the data were submitted to analysis of variance and polynomial regression. The treatments were evaluated by determining the moisture content, seedling emergence, vigor tests (first count, emergency speed index, fresh and dry weight of shoots and roots), and grown analysis (number of leaves, seedling height and stem diameter). Oiticica seeds behave as orthodox, with increase on the emergency when its moisture content is reduced; the critical moisture content below which there is loss of viability is around 6%. Keywords: oiticica; emergency; desiccation; vigor. A oiticica (Licania rigida Benth) e uma especie arborea perene, oleaginosa, que tem grande importancia na regiao semiarida do nordeste do Brasil por preservar as margens dos rios e riachos temporarios. Devido a escassez de informacoes referentes a dessecacao de suas sementes, o trabalho teve como objetivo avaliar a qualidade fisiologica de sementes de oiticica submetidas a diferentes periodos de secagem. O delineamento experimental foi inteiramente ao acaso e os dados, submetidos a analise de variancia e de regressao polinomial. Os tratamentos foram avaliados pela determinacao do teor de agua, emergencia de plantulas, testes de vigor (primeira contagem, indice de velocidade de emergencia, massa fresca e seca da parte aerea e raizes), e analise de crescimento (numero de folhas, altura de plantulas e diametro caulinar). As sementes de oiticica comportam-se como ortodoxas, com elevada emergencia a medida que seu teor de agua e reduzido; o nivel critico de agua, abaixo do qual ha perda de viabilidade, esta em torno de 6%. Palavras-chave: oiticica; emergencia; dessecacao; vigor.
ISSN:1980-5098
1980-5098
DOI:10.5902/1980509835339