Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Mg2+ | required | Betula pendula |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
UDP-glucose + D-fructose | Betula pendula | - |
UDP + sucrose | - |
r |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Betula pendula | - |
var. pendula and var. carelica | - |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
phloem | activity of sucrose synthase and the content of starch in the xylem and phloem of the two birch varieties, 40-year-old trees, and 8-year-old trees of Betula carelica, overview | Betula pendula | - |
xylem | activity of sucrose synthase and the content of starch in the xylem and phloem of the two birch varieties, 40-year-old trees, and 8-year-old trees of Betula carelica, overview | Betula pendula | - |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
UDP-glucose + D-fructose | - |
Betula pendula | UDP + sucrose | - |
r |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
30 | - |
assay at | Betula pendula |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7.4 | - |
assay at | Betula pendula |
General Information | Comment | Organism |
---|---|---|
physiological function | low enzyme activity during cambial growth reduces sink capacity of xylem tissues, thus leading to a considerable increase in the sucrose content in the phloem, which can alter the program of cell development in the cambial zone of Karelian birch. Specific texture of Karelian birch wood emerges as a result of deviations in cambial activity, overview. Upon the decline in cambial activity, the dynamics of changes in enzyme activity in Karelian birch is similar to that in common birch: in xylem tissues the enzyme activity becomes lower but the lowering is not as strong as in Betula pendula var. pendula. In phloem tissues the enzyme activity increases but, in contrast to common birch, this increase is not accompanied by substantial accumulation of starch in parenchymal cells of the phloem | Betula pendula |