THE LENGTH AND NUMBER OF EPIDERMAL CELLS IN LEAVES OF STRAWBERRY PLANTS AS INFLUENCED BY CHILLING TREATMENT DURING GROWTH AND RESTING PERIOD
When the plants were chilled, both the petiole length and leaf area increased significantly more that those of the plants which received no chilling, especially in the 3rd to 5th leaves to emerge during the forcing conditions. The increase in both petiole length and leaf area was mainly attributed to the increase in the number of cells, when the plants were chilled from 15 July on. In the plants chilled from 1 October and 22 November on, however, the increase in the petiole length was mainly attributed to the increase in the petiolar cell length; concurrently, the increase in the leaf area was due mainly to the increase in the number of cells per leaf area. The rest period of the strawberry plants was not induced by chilling treatment alone.