Respiratory costs and rate of protein turnover in the roots of a fast-growing (Dactylis glomerata L.) and a slow-growing (Festuca ovina L.) grass species Abstract this abstract are based on the assumption that 50% recycling of the 14C-labelled leucine took place in the Protein turnover is generally regarded as one of the roots of both grass species. most important maintenance processes in plants in terms of energy requirements. In this study, the contri-Key words: Dactylis glomerata L., Festuca

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... ovina L., mainbution of protein turnover to the respiratory costs for tenance, protein turnover, relative growth rate, specific maintenance in the roots of two grass species, the respiratory costs. fast-growing Dactylis glomerata L. and the slowgrowing Festuca ovina L., is evaluated. Plants were grown under controlled-environment conditions in a