|
KMID : 0903619900310020125
|
|
Journal of the Korean Society for Horticultural Science
1990 Volume.31 No. 2 p.125 ~ p.134
|
|
|
Some Factors of Rough Bark Disorder in Dwarf Apple Trees (Malus domestica Borkh .)
|
|
|
|
|
Abstract
|
|
|
This study was conducted to investigate the cause of poor root development as related to rough bark appearance in dwarf apple trees. Root development, ^(14)C translocation to root in the nurseries and adult tree of `Fuji´ cultivar grafted on M26 was compared with resistant cultivar. ^(14)C translocation in disordered tree with rough trunk bark and trunk girdled tree was examined to clarify the inhibition effect of damaged trunk bark on translocation of carbohydrates into root and development of roots.
The results obtained were summarized as follows:
1. Over fruiting (non-thinning) caused severe growth inhibition of top and root in the `Fuji´ apple tree, while no adverse effect was observed in the `Tsugaru.´
2. The dry weight of the root of the 1 or 2 year-old young `Fuji´ apple tree was less than that of the young `Tsugaru´ apple tree. But the concentrations of sugar and starch in the root of the `Fuji´ tree were higher than those of the `Tsugaru´ tree.
3. The results of the ^(14)C tracer treatment on photosynthesis and carbohydrates distribution in double nursery plants indicated that the production and translocation of carbohydrates were better progressed in `Tsugaru´ cultivar as compared with `Fuji.´ This trend was more significant in the apple trees treated with girdling.
4. In the case of the 2 year-old apple tree on M26, own rooted stock, the total content of ^(14)C in the `Fuji´ tree was higher and the translocation of carbohydrates with ^(14)C to the root was more active as compared with `Tsugaru´ cultivar. But girdling reduced the total ^(14)C in the two cultivar, particularly the translocation of ^(14)C to the root of `Fuji´ was drastically reduced by girdling.
5. More ^(14)C was absorbed and translocated to the root in 7 year-old bearing tree of `Tsugaru´ cultivar as compared with `Fuji´ tree.
6. Total ^(14)C content in disordered tree with rough trunk bark was no more than on fourth as compared with that of normal tree and ^(14)C translocation into trunk bark and root was markedly lower than normal tree.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|