A SIMPLE IMPEDIMETRIC DEVICE FOR IN SITU ANALYSIS OF PLANT TISSUES

作者：Simeonov Philip N^*; Kocheva Konstantina V; Kochev Valery K; Georgiev Georgi I

来源：Comptes Rendus de l Academie Bulgare des Sciences, 2013, 66(7): 969-974.

DOI：10.7546/cr-2013-66-7-13101331-6

• impedance analysis
• leaf desiccation
• plant water relations

Construction and major features of a set-up suitable for impedance analysis of plant tissues are disclosed in the paper. The measuring device is based on a simple scheme operating in conjunction with the PC sound card. While many programmes running directly on sound card are capable of simulating impedance analyzer, their performance is not consistent when chemical or biological systems are explored. The main reason is a relatively low input impedance of the card itself. An addition of coordinating preamplifier between the sample and the audio input of the PC drastically improves the implementation of the set-up. On the other hand, a specially designed measuring head gives possibilities for straightforward assessment of plant tissue%26apos;s electrical parameters in situ at various ambient conditions. Some examples of impedance analysis of intact leaves are given and their behaviour in regard to a preliminary imposed desiccation is briefly discussed.

• 出版日期2013