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Contributions of sucrose synthase and invertase to the metabolism of sucrose in developing leaves

, : Contributions of sucrose synthase and invertase to the metabolism of sucrose in developing leaves. Plant Physiology 85(2): 407-412

The relative contributions of invertase and sucrose synthase to initial cleavage of phloem-imported sucrose was calculated for sink leaves of soyabeans and sugarbeet. Invertase from yeast hydrolysed sucrose 4200 times faster than 1'-deoxy-1'-fluorosucrose (FS) while sucrose cleavage by sucrose synthase from developing soyabean leaves proceeded only 3.6 times faster than cleavage of FS. S, used as tracers of sucrose, were transported at identical rates to developing leaves through the phloem.

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