Methodology for performing the germination test and utilization of x-rays to evaluate seed quality of aroeira-branca (Lithraea molleoides (Vell.) Engl.). / Metodologia para a condução do teste de germinação e utilização de raios-X para a avaliação da qualidade de sementes de aroeira-branca (Lithraea molleoides (Vell.) Engl.).

AUTOR(ES)
DATA DE PUBLICAÇÃO

2002

RESUMO

The present work was carried out with the objective to establish a methodology for the germination test and to verify the possibility to use the X-rays in the evaluation of aroeira-branca seed quality. Four seed lots collected in different places in the south region of the State of Minas Gerais in 2001 were used. The conditions for performing the germination test were determinated basing on the percentage and on the rate of seed germination under nine ranges of temperature in a linear gradient between 15 and 35°C and on substrates of blotters, sand and vermiculite. For the X-ray test, radiography of seeds were made as well as classification in relation to stage of development and morphology, normal and abnormal, of embryo; the germination test was run aiming to detect possible relationship between seedlings/seeds and the respective anatomy as revealed by radiographic pictures. It was concluded that the germination test for aroeira-branca seeds may be run at 27 °C on vermiculite substrate; records have to be made on twenty and forty-five days after the begining of the test. The X-ray test was seen to be able to detect successfully damages and abnormalities in embryos of aroeira-branca seeds.

ASSUNTO(S)

árvores florestais germinação de sementes seed quality seed germination forest species sementes – qualidade

ACESSO AO ARTIGO

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