ISHS Acta Horticulturae 567: IV International Strawberry Symposium
INVESTIGATION OF THE DYNAMICS OF FRUIT GROWTH IN TWO STRAWBERRY VARIETIES |
| Authors: | T. Kassai, P. Mosoni, R. Patyi, F. Dénes |
| Keywords: | Fragaria x ananassa, jump size, relative growth rate |
| Abstract:
The effects of the position of the fruits in the inflorescence, the harvest and the environmental conditions, on the dynamics of fruit growth and final fruit size, were investigated in the cvs. Elsanta and Marmolada. Fruiting trusses were recorded by a video camera every second day. Later the frames of the video film were evaluated: the diameter and the length of the fruits on the frames were measured by software, made especially for the purpose. The initial growth of the fruit was slow, then the growth speeded up from a specific point in development. This point was termed “jump size”, and was correlated to final size of the fruit. The absolute growth pattern of fruit were double sigmoid curves for both Elsanta and Marmolada. However, the relative growth patterns of each fruit were irregular. The average relative growth considerably decreased on very hot days (> 20oC). On the days when daily air and soil temperature were very high, the growth rate of Elsanta was lower than Marmolada. The process of harvesting did not influence the growth patterns of the remaining fruit on the truss, nor did the position of fruit within the truss. | |
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