Abstract
Oscillation movements of primary roots of pea seedlings were investigated after low- and high-energy irradiation (10−2 and 106 W m−2) which was applied continuously and in pulses at intervals of 3 and 30 min. Oscillation amplitudes of control roots grown in darkness were lower (1 mm) than those of irradiated ones recorded in our previous experiments. The elongation rate of roots grown under scattered and low-energy irradiation as well as their mean oscillation amplitude (2.6 mm) and frequency (8 h) correspond to the standard values recorded in previous experiments. The same effects on root growth and oscillations had scattered electronic flash irradiation.
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