抄録
Freezing tolerance in shoot apices of blueberried honeysuckle (Lonicera caerulea L. var. emphyllocalyx NAKAI) was low in summer, and very high in winter. Levels of freezing tolerance increased from October to December, and decreased from March to April. Water content was low in winter, and high in summer. Six kinds of sugar were detected in shoot apices. Changes in total sugar content and sucrose content did not coincide with the changes in freezing tolerance. Periodicity of accumulation of high raffinose and stachyose is considerably correlated with the period in which shoot apices showed the high freezing tolerance. These results suggest that raffinose and stachyose serve to increase freezing tolerance, and that sugar composition was more important than total sugar content.
