01-30-2009, 03:16 PM
The Plant Whisperer
Join Date: Jul 2004
Location: Harrogate, TN
iTrader Positive Rating: 100%
| | Re: glutaraldehyde instead of excel
Originally Posted by livionakano
Did any of you, Glutaraldehyde users, ever noticed a lowering, or even vanishing concentrations of NO3?
When noticed that, we tested even in a bucket of water, only with some KNO3, and after adding some Glutaraldehyde, concentration as lowered too much!
Could be a reaction from both, or a change in the testing parameters?
P.S. Not registered with Excel, just when using Glutaraldehyde
This is an absolutely fascinating observation and seems to support my suspicions!
The way plants incorporate nitrogen into their tissues is by using an enzyme called glutamine synthase to make glutamine in the following reaction:
(NH4+) + Glutamic acid ----glutamine synthase ---> glutamine
Glutamic acid looks like this:
and glutamine looks like this:
Gluteraldehyde (excel) looks like this:
Just look at the similarity between gluteraldehyde and glutamic acid and glutamine! The drop in nitrates makes total sense because the plant must be using gluteraldehyde as a backbone for adding nitrogen to. This is probably why the nitrate levels in the water drop after adding gluteraldehyde, because the plant can absorb more nitrogen without having to waste energy making the backbone for it.
I wonder if instead of being a CO2 substitute, is gluteraldehyde really just helping the plants absorb nitrogen faster (and therefore helping them grow faster)? After all, if it was providing CO2 then it would drive photosynthesis faster and produce pearling, and I have never seen plants pearl after adding excel, nothing like adding CO2 and seeing pearling.