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Plants as bio-sensors

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#1 avitaletti

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Posted 18 April 2013 - 09:06 AM

Hello we are trying to measure the electrical signal emitted by plants in reaction to stimuli. In particulr we wish to reproduce the experiment depicted in Fig 17.2 of Electrical Signals in Plants: Facts and Hypotheses by Eric Davies. Consider the follwogin experimenta set-up electrode number 1 (E1) is placed on a leaf, electrode number 2 (E2) on the steam at 5 centimeeters from E1 and finally the reference EREF at 5 ecntimeters from E2. I used the EI1040 Instrumentatino amplifier to increse the impedence of the instrumentation E1 is connected to A+In of the EI1040 EREF is connected to A-In of the EI1040 A-In is connected to the GND by a 10K resistor E2 is connected to B+In of the EI1040 EREF is connected to B-In of the EI1040 B-In is connected to the GND by a 10K resistor The output Aout and Bout of the EI1040 are connected to the U12 sampling at 1Ks Aout is connected to AI0 Bout is connected to AI1 The signals should be in the range tens of millivolts The question is ... Do you think this experimental set-up is appropriate? Any suggestion to improve it? Thanks in advance, Andrea

#2 LabJack Support

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Posted 18 April 2013 - 11:23 AM

Your connections seem reasonable. If you are having trouble, I would initially troubleshoot with only 1 electrode connected, so remove all the channel B connections.

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