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STUDIES IN THE RESPIRATORY AND CARBOHYDRATE METABOLISM OF PLANT TISSUES
Author(s) -
BARKER J.
Publication year - 1965
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1965.tb05391.x
Subject(s) - starch , sucrose , carbohydrate , chemistry , sugar , biochemistry , hexose , oxygen , carbohydrate metabolism , uridine diphosphate glucose , nitrogen , phosphate , metabolism , enzyme , organic chemistry
S ummary Earher evidence that starch is not formed from sugar in plant tissues in the absence of oxygen was confirmed for potatoes. The failure to form starch is attributed to a deficiency of glucose‐1‐phosphate in nitrogen. As in other plant tissues the dissolution of starch to sugar also appeared to be retarded in potatoes in the absence of oxygen. This observation would be explained if starch is degraded by phosphorylase to glucose‐1‐phosphate, which is then converted to sucrose before partial inversion to hexose; the rate of formation of sucrose in nitrogen would be retarded by lack of uridine triphosphate.