Abstract
The possibility of using the period of free vibrations to determine elastic modulus and flexural rigidity of plant material with contrasting elasticity to viscosity ratios was tested. A simple, easy-to-operate method is described. Both the mature sections of Triticale peduncle as well as those sampled from the meristematic zone were found to behave like a lightly damped linear oscillator, providing that the excitements were of a very small amplitude. Elastic modulus calculated from the period of free vibrations for the meristematic zone was consistent with most data reported in the literature for other growing tissues investigated by the resonance technique. A high gradient of elastic modulus, from 33 MPa to 2-89 GPa per 8 cm was found within the zone of differentiation and development of strengthening tissues. The applicability of the free vibration technique to study plant rigidity as compared to other methods is discussed.
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