Re: [DIYbio] Measuring plant voltages

Hi Carlos,

The SpikerBox is an AC amp, and can't record the slow potentials of plants (for example, the action potential of a Venus Fly Trap is ~ 1 second long).

But, you are in luck. You only need about 100-200 gain to amplify the voltages of plants such as fly traps and sensitive mamomas.

There is a book on "plant electrophysiology"

http://www.springer.com/life+sciences/plant+sciences/book/978-3-540-32717-2

That is a bit expensive but perhaps you can find it at your local University Library.

Cheers,

Tim

On Thursday, August 1, 2013 9:23:12 PM UTC-4, Sebastian wrote:

SpikerBox works very well with plant action potentials. If you google Ivan Henriques, you may find his recent art work on a plant controlled robot. It takes the signal moves the not in a random direction. Its a simple DIY box and its very fun to play with. Good luck!

Sent from my Windows Phone

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From: Carlos Castellanos
Sent: 8/1/2013 9:20 PM
To: diy...@googlegroups.com
Subject: [DIYbio] Measuring plant voltages

Hi gang,

I'm hoping there is someone here with some knowledge of plant biology. I would be very grateful for any advice, references, etc on the subject of measuring plant voltages and other properties (e.g. pH). I'm thinking a GSR circuit using a wheatstone bridge and op-amp will do but I would appreciate any schematics/diagrams, etc

I would also like to see discussion of parameters, variables, experiments most galvanically active plants, etc. I am particularly interested in measuring voltages and biochemistry in wetland/marshy areas.

Any suggestions concerning other (simple) techniques for real-time feedback from plants would be appreciated.

Thanks!
-Carlos

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