Influencia dos frutos sobre a fixação de nitrogenio em soja (Glycine max L. Merril) ov. Santa Rosa

AUTOR(ES)
DATA DE PUBLICAÇÃO

1987

RESUMO

The main objective of this study was to obtain information on the relationship between reproductive development and nodule activity. For this purpose, we used nodulated soybeans induced to flower at different ages. The plants were grown in vermiculite with a nutrient solution deficient in nitrogen, and maintained in a greenhouse. Flower induction was carried out at the V IND. 2 , V IND. 5 and V IND. 8 stages of development. Other treatments included the removal of flowers and the maintenance of plants in the vegetative state by growing them under long-day conditions. Measurements of nitrogen fixation were made with an intact plant system, which allows the use of the same plants throughout the growth cycle. When these measurements required the simultaneous quantification of nodule number and weight, a detached root system was used, where the shoot was sectioned immediately before the measurements. The intact and detached root systems gave similar activities for nitrogenase, showing that one system is just as reliable as the other. One advantage of the intact system is the possibility of using the same plants throughout the growth cycle. Of the experiments set up, two were carried out in the summer, where plants induces in the V IND. 2 and V IND. 5 stages produced activity curves with similar profiles and these for independent of the stage of reproductive development... Note: The complete abstract is available with the full electronic digital thesis or dissertations.

ASSUNTO(S)

nitrogenio soja

ACESSO AO ARTIGO

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