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The activity of uridine diphosphate-d-glucose-4-epimerase in cambial tissue and differentiating xylem isolated from sycamore (Acer pseudoplatanus) trees

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Summary

It is demonstrated that, contrary to another report, UDPGlc-4-epimerase is present in both sycamore (Acer pseudoplantanus) cambium and xylem tissue. It is suggested that the enzyme may be localised in the non-lignifying primary-walled cells common to both tissue fractions.

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Abbreviations

UDPGlc:

Uridine Diphosphate-D-Glucose

UDPGlcA:

Uridine Diphosphate-D-Glucuronic Acid

UDPXyl:

Uridine Diphosphate-D-Xylose

NAD:

Nicotinamide-adenine dinucleotide

E.C.:

Enzyme commission

References

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  • Northcote, D. H.: Changes in cell walls of plants during differentiation. In: Society for Experimental Biology Symposium 17, 157–174 (1963). London: Cambridge University Press.

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  • Rubery, P. H.: The activity of uridine diphosphate-D-glucose: nicotinamideadenine dinucleotide oxidoreductase in cambial tissue and differentiating xylem isolated from Sycamore trees. Planta (Berl.) 103, 188–192 (1972).

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  • Rubery, P. H., Northcote, D. H.: Site of phenylalanine-ammonia-lyase activity and synthesis of lignin during xylem differentiation. Nature (Lond.) 219, 1230–1234 (1968).

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  • Thornber, J. P., Northcote, D. H.: Changes in chemical composition of a cambial cell during its differentiation into xylem and phloem tissue in trees. 2. Carbohydrate constituents of each main component. Biochem. J. 81, 455–464 (1961).

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Authors and Affiliations

  1. Department of Biochemistry, University of Cambridge, Tennis Court Road, Cambridge, UK

    P. H. Rubery

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  1. P. H. Rubery
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Rubery, P.H. The activity of uridine diphosphate-d-glucose-4-epimerase in cambial tissue and differentiating xylem isolated from sycamore (Acer pseudoplatanus) trees. Planta 111, 267–269 (1973). https://doi.org/10.1007/BF00385110

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  • DOI: https://doi.org/10.1007/BF00385110

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