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Nonstructural carbohydrates are important back bones of life strategies of long-living trees. In conifers and broadleaf trees, sucrose, glucose, and fructose constitute the dominating soluble, starch the pivotal non-soluble storage carbohydrates. Sucrose is the preferred transport sugar. In addition, species-specific sugar alcohols can be found. Like in herbaceous plants, photoassimilates are allocated from green (source) tissues to nongreen (sink) areas. In addition, leaves of evergreen trees do not only deliver carbohydrates but can also serve as storage organs. Woody axes (branches and the trunk) are not only involved in long distance transport (bark) of carbon. The living wood tissues (sapwood) and the bark are also the major storage compartments of carbon. During heartwood formation, carbohydrates sustain the formation of phenolic extractives, components which ascribe for the natural durability of wood. As roots of most trees are part of plant microbe interactions (mycorrhiza), their carbohydrate status and the role of sugars in this interaction is also of importance. Allocation and partitioning of carbohydrates between and within the individual organs of a tree depend on ontogenetic (eg stage of organ maturation) and environmental (eg mineral nutrition, toxic gases, climate, pathogenic and symbiotic interactions) impacts.
For further detail slog on website :
http://www.sciencedirect.com/science/article/pii/S0378519X00800161
Available online 20 April 2007.
https://doi.org/10.1016/S0378-519X(00)80016-1Nonstructural carbohydrates are important back bones of life strategies of long-living trees. In conifers and broadleaf trees, sucrose, glucose, and fructose constitute the dominating soluble, starch the pivotal non-soluble storage carbohydrates. Sucrose is the preferred transport sugar. In addition, species-specific sugar alcohols can be found. Like in herbaceous plants, photoassimilates are allocated from green (source) tissues to nongreen (sink) areas. In addition, leaves of evergreen trees do not only deliver carbohydrates but can also serve as storage organs. Woody axes (branches and the trunk) are not only involved in long distance transport (bark) of carbon. The living wood tissues (sapwood) and the bark are also the major storage compartments of carbon. During heartwood formation, carbohydrates sustain the formation of phenolic extractives, components which ascribe for the natural durability of wood. As roots of most trees are part of plant microbe interactions (mycorrhiza), their carbohydrate status and the role of sugars in this interaction is also of importance. Allocation and partitioning of carbohydrates between and within the individual organs of a tree depend on ontogenetic (eg stage of organ maturation) and environmental (eg mineral nutrition, toxic gases, climate, pathogenic and symbiotic interactions) impacts.
For further detail slog on website :
http://www.sciencedirect.com/science/article/pii/S0378519X00800161
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