INFLUENCE OF TEMPERATURE ON SHOOT ELONGATION IN YOUNG TOMATO PLANTS

U.E. Gertsson
It is desirable to produce compact young tomato plants without retarding development. It is known that shoot elongation in tomatoes can be inhibited to some extent by low temperatures during the morning hours. In this investigation it was found that the effect of a temperature ‘drop’ was similar irrespective of whether the temperature reduction was made at sunrise or some hours later. The rate of flower development was influenced chiefly by the mean temperature. Consequently, a short cool period will not delay development, provided that the temperature integral is not changed.

The early night hours have been reported as an active period for extension growth. Therefore, the effects of high and low temperatures during the first 3 hours after nightfall were studied. The temperature during this period was found not to influence shoot elongation, and it is concluded that the optimal effect of temperature change is not synchronous with the period when the extension growth is greatest.

Gertsson, U.E. (1992). INFLUENCE OF TEMPERATURE ON SHOOT ELONGATION IN YOUNG TOMATO PLANTS. Acta Hortic. 327, 71-76
DOI: 10.17660/ActaHortic.1992.327.8
https://doi.org/10.17660/ActaHortic.1992.327.8