This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via CrossRef Citing Articles via Web of Science (1) Citing Articles via Google Scholar Google Scholar Articles by Zimmerman, R. H. Articles by Shreve, A. W. Search for Related Content PubMed PubMed Citation Articles by Zimmerman, R. H. Articles by Shreve, A. W. Agricola Articles by Zimmerman, R. H. Articles by Shreve, A. W.

Articles

Glucose Metabolism of Various Tissues of Pear Buds

Crops Research Division, Agricultural Research Service, United State Department of Agriculture, Beltsville, Maryland 20705

Various tissues in flower buds of Pyrus calleryana Decne. differ in their metabolic activity. Brown outer scales utilized more exogenously supplied glucose, particularly through the pentose phosphate pathway, than did the central axes and the green inner scales. They also contained more endogenous reducing sugars, and glucose leaked out more readily from the brown scales than from the other tissues. In contrast, respiration of the central axes was nine times as great as that of the brown scales, and two to four times as much glucose was metabolized through glycolysis. Membranes of the central axes were less permeable to glucose. Because the brown scales are 75% of the dry weight of the bud, they dominate its pattern of glucose metabolism.