Comparative analysis of growth and movements of the aboveground parts in some deciduous woody species |
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Authors: | Radmila ČíŽková |
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Institution: | (1) Institute of Systematical and Ecological Biology, Czechoslovak Academy of Sciences, Poříčí 3b, 603 00 Brno, Czechoslovakia |
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Abstract: | Vertical projections of nutation movements in the epicotyls of sessile oak, Turkey oak, horse chestnut and hypocotyls of European
beech were recorded by means of photography and time-lapse cinematography at the early stages of their ontogeny. Attention
was paid to the kinetics of growth rate, diameter of the lower part of the elongating zone, and the form, amplitude and frequency
of nutation turns. At the beginning of ontogeny the vertical projection of the movements of all woody species under study
was represented by irregular curves, followed by elliptical trajectories, particularly when reaching the maximum growth rate.
The highest average growth rate was recorded in horse chestnut, followed by oak, and the lowest values were exhibited by beech.
As to the size of amplitudes opposite results were obtained. The frequency of turns proved to be a less sensitive parameter
characterizing the movement. It is suggested that the geocontrol system of horse chestnut is more effective than that of oak
and, especially, of beech. |
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Keywords: | |
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