Development of Transducer Unit to Transmit Electrical Action Potential of Plants to A Data Acquisition System

摘要

There is a lot of evidence that plants respond to the alteration of the environmental parameters, particularly with respect to nutrient availability and concomitant changes in partitioning and growth. Extracellular electrical signals that produced from plants have different pattern depending on factors that may cause stress such as water deficiency, nutrient elements shortage, high salinity level in roots environment etc. Due to very low current level of electrical signal of plant’s, the transmission of signal must be without distortion. The objective of this work is the development of a transducer unit to transmit electrical action potential of plants to a data acquisition. This transducer could be used to improve the efficiency of data acquisition system, in order to avoid: a) the white Gaussian noise (WGN), (50 Hz power line noise as well as the noise of the operating electrical devices, operating in any commercial greenhouse), and b) the distortion from RF signals. The results show that electrical action potential measurements on plants, obtained with the use of the design transducer unit had a negligible error in contrast to a direct connection of sensors into data acquisition. The measurements are recorded, via a data acquisition system and processed using LabVIEW code.