Abstract
The response of excised stem segments of several tree species to freezing and thawing cycles was studied. All species studied (Thuja occidentalis, Fagus grandifolia, and Betula papyrifera) except maple (Acer spp.) exuded sap while freezing and absorbed on thawing. Maple stems absorbed sap while freezing and exuded sap during the thaw only when sucrose was present in the vessel solution. Increased concentration of sucrose in the vessel sap led to increased exudation. In the absence of sucrose, maple stems absorbed sap on thawing. The presence of sucrose enhanced sap absorption during freezing cycles in maples. In general, large sugars, disaccharides and larger, could substitute for sucrose in the maple exudation response while sugar hexoses could not. The results are discussed in relation to the O'Malley-Milburn model (1983 Can J Bot 61: 3100-3106) of sap flow in maples.
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- Marvin J. W., Erickson R. O. A Statistical Evaluation of Some of the Factors Responsible for the Flow of Sap from the Sugar Maple. Plant Physiol. 1956 Jan;31(1):57–61. doi: 10.1104/pp.31.1.57. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Marvin J. W., Greene M. T. TEMPERATURE-INDUCED SAP FLOW IN EXCISED STEMS OF ACER. Plant Physiol. 1951 Jul;26(3):565–580. doi: 10.1104/pp.26.3.565. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Marvin J. W., Morselli M. Rapid low temperature hydrolysis of starch to sugars in maple stems and in maple tissue cultures. Cryobiology. 1971 Aug;8(4):339–344. doi: 10.1016/0011-2240(71)90128-3. [DOI] [PubMed] [Google Scholar]
- Stevens C. L., Eggert R. L. OBSERVATIONS ON THE CAUSES OF THE FLOW OF SAP IN RED MAPLE. Plant Physiol. 1945 Oct;20(4):636–648. doi: 10.1104/pp.20.4.636. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tyree M. T. Maple sap uptake, exudation, and pressure changes correlated with freezing exotherms and thawing endotherms. Plant Physiol. 1983 Oct;73(2):277–285. doi: 10.1104/pp.73.2.277. [DOI] [PMC free article] [PubMed] [Google Scholar]