María José Raso

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A ureidoglycolate-degrading activity was analysed in different tissues of French bean (Phaseolus vulgaris L.) plants during development. Activity was detected in all the tissues analysed, although values were very low in seeds before germination and in cotyledons. After radicle emergence, the activity increased due to high activity present in the axes. The(More)
In tropical legumes like French bean (Phaseolus vulgaris) or soybean (Glycine max), most of the atmospheric nitrogen fixed in nodules is used for synthesis of the ureides allantoin and allantoic acid, the major long distance transport forms of organic nitrogen in these species. The purpose of this investigation was to characterise the allantoate degradation(More)
French bean (Phaseolus vulgaris) is a legume that transports most of the atmospheric nitrogen fixed in its nodules to the aerial parts of the plant as ureides. Changes in ureide content and in enzymatic activities involved in their metabolism were identified in the cotyledons and embryonic axes during germination and early seedling development. Accumulation(More)
Allantoinase (allantoin amidohydrolase, EC 3.5.2.5) catalyses the hydrolysis of allantoin to allantoic acid, a key reaction in the biosynthesis and degradation of ureides. This activity was determined in different tissues of French bean plants (Phaseolus vulgaris L.) which were grown under nitrogen-fixing conditions. Allantoinase activity was detected in(More)
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