Abstract
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.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Bourke J. B., Faust M., Massey L. M., Jr A multiple unit radiometric respirometer for the measurement of the metabolism of carbon-14 labelled substrates. Int J Appl Radiat Isot. 1967 Aug;18(8):619–623. doi: 10.1016/0020-708x(67)90062-2. [DOI] [PubMed] [Google Scholar]
- Burg S. P., Burg E. A., Marks R. Relationship of Solute Leakage to Solution Tonicity in Fruits and Other Plant Tissues. Plant Physiol. 1964 Mar;39(2):185–195. doi: 10.1104/pp.39.2.185. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Faust M., Chase B. R., Massey L. M. Ontogenetic changes in respiratory pathways in cortland apple skin during storage. Plant Physiol. 1966 Dec;41(10):1610–1614. doi: 10.1104/pp.41.10.1610. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gibbs M., Beevers H. Glucose Dissimilation in the Higher Plant. Effect of Age of Tissue. Plant Physiol. 1955 Jul;30(4):343–347. doi: 10.1104/pp.30.4.343. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Humphreys T. E., Dugger W. M. The Effect of 2,4-Dichlorophenoxyacetic Acid on Pathways of Glucose Catabolism in Higher Plants. Plant Physiol. 1957 Mar;32(2):136–140. doi: 10.1104/pp.32.2.136. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kolattukudy P. E., Reed D. J. Metabolism of Red Beet Slices II. Effects of Aging. Plant Physiol. 1966 Apr;41(4):661–669. doi: 10.1104/pp.41.4.661. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Zimmerman R. H., Faust M. Pear bud metabolism: seasonal changes in glucose utilization. Plant Physiol. 1969 Sep;44(9):1273–1276. doi: 10.1104/pp.44.9.1273. [DOI] [PMC free article] [PubMed] [Google Scholar]