Journal of the Japanese Society for Horticultural Science
Online ISSN : 1880-358X
Print ISSN : 0013-7626
ISSN-L : 0013-7626
EFFECTS OF RINGING WITH DIFFERENT DEGREE OF DEFOLIATION UPON THE MATURATION OF BERRIES AND THE CALLUS FORMATION OF GRAPE VINES
Y. YATOMIH. IJICHI
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1936 Volume 7 Issue 1 Pages 194-199

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Abstract

Many authors think that the organic substances elaborated in the leaves move downward largely through the phloem, and sugars accumulate directly from leaves to berries. On the contrary some indicate that the translocation occours not only from the leaves, but also from the other part of the plant, as forin stances trunk, roots etc.
The writers of this paper found, after their experiments, that if 0-1 leaf were left above the ring the berries would not grow, while if 5-7 leaves were left above the ring the berries were hastened to ripe and were highly increased in sugar content; and the development of callus at the ringed part and the diametrical growth in shoots above the rings increased in proportion to the number of the leaves remained above the rings, and so the writers think that a sufficient amount of the leaf surface, at least more than 5 leaves above the ring, is absolutely necessary to obtain the fair results in ringing operation.
The writers also found that after the callus was vigorously formed at the upper edge of the ringed part before véraison, new callus begins to form rapidly at thelower edge of the ring.
It seems to the writers that, although the evidence may not be conclusive, it at least suggests that the movement of organic substances both upward and downward changes with the governing growth which is determined by the stage of development which OINOUE indicated as the anaptiperiodism.

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